diff options
Diffstat (limited to 'watch-library/watch')
26 files changed, 1669 insertions, 1144 deletions
diff --git a/watch-library/watch/watch.c b/watch-library/watch/watch.c index 659be1c5..d55b61fe 100644 --- a/watch-library/watch/watch.c +++ b/watch-library/watch/watch.c @@ -23,631 +23,20 @@ */ #include "watch.h" -#include "peripheral_clk_config.h" -#include <stdlib.h> - -////////////////////////////////////////////////////////////////////////////////////////// -// User callbacks and other definitions - -ext_irq_cb_t btn_alarm_callback; -ext_irq_cb_t a2_callback; -ext_irq_cb_t d1_callback; +// TODO: this should all live in watch_deepsleep.c, but right now watch_extint.c needs it +// because we're being too clever about the alarm button. static void extwake_callback(uint8_t reason); +ext_irq_cb_t btn_alarm_callback; - -////////////////////////////////////////////////////////////////////////////////////////// -// Initialization - -void _watch_init() { - // disable the LED pin (it may have been enabled by the bootloader) - watch_disable_digital_output(RED); - - // Use switching regulator for lower power consumption. - SUPC->VREG.bit.SEL = 1; - while(!SUPC->STATUS.bit.VREGRDY); - - // External wake depends on RTC; calendar is a required module. - CALENDAR_0_init(); - calendar_enable(&CALENDAR_0); - - // Not sure if this belongs in every app -- is there a power impact? - delay_driver_init(); - - // set up state - btn_alarm_callback = NULL; - a2_callback = NULL; - d1_callback = NULL; -} - - -////////////////////////////////////////////////////////////////////////////////////////// -// Segmented Display - -static const uint8_t Character_Set[] = -{ - 0b00000000, // - 0b00000000, // ! (unused) - 0b00100010, // " - 0b01100011, // # (degree symbol, hash mark doesn't fit) - 0b00000000, // $ (unused) - 0b00000000, // % (unused) - 0b01000100, // & ("lowercase 7" for positions 4 and 6) - 0b00100000, // ' - 0b00111001, // ( - 0b00001111, // ) - 0b00000000, // * (unused) - 0b11000000, // + (only works in position 0) - 0b00000100, // , - 0b01000000, // - - 0b01000000, // . (same as -, semantically most useful) - 0b00010010, // / - 0b00111111, // 0 - 0b00000110, // 1 - 0b01011011, // 2 - 0b01001111, // 3 - 0b01100110, // 4 - 0b01101101, // 5 - 0b01111101, // 6 - 0b00000111, // 7 - 0b01111111, // 8 - 0b01101111, // 9 - 0b00000000, // : (unused) - 0b00000000, // ; (unused) - 0b01011000, // < - 0b01001000, // = - 0b01001100, // > - 0b01010011, // ? - 0b11111111, // @ (all segments on) - 0b01110111, // A - 0b01111111, // B - 0b00111001, // C - 0b00111111, // D - 0b01111001, // E - 0b01110001, // F - 0b00111101, // G - 0b01110110, // H - 0b10001001, // I (only works in position 0) - 0b00001110, // J - 0b01110101, // K - 0b00111000, // L - 0b10110111, // M (only works in position 0) - 0b00110111, // N - 0b00111111, // O - 0b01110011, // P - 0b01100111, // Q - 0b11110111, // R (only works in position 1) - 0b01101101, // S - 0b10000001, // T (only works in position 0; set (1, 12) to make it work in position 1) - 0b00111110, // U - 0b00111110, // V - 0b10111110, // W (only works in position 0) - 0b01111110, // X - 0b01101110, // Y - 0b00011011, // Z - 0b00111001, // [ - 0b00100100, // backslash - 0b00001111, // ] - 0b00100011, // ^ - 0b00001000, // _ - 0b00000010, // ` - 0b01011111, // a - 0b01111100, // b - 0b01011000, // c - 0b01011110, // d - 0b01111011, // e - 0b01110001, // f - 0b01101111, // g - 0b01110100, // h - 0b00010000, // i - 0b01000010, // j (appears as superscript to work in more positions) - 0b01110101, // k - 0b00110000, // l - 0b10110111, // m (only works in position 0) - 0b01010100, // n - 0b01011100, // o - 0b01110011, // p - 0b01100111, // q - 0b01010000, // r - 0b01101101, // s - 0b01111000, // t - 0b01100010, // u (appears as superscript to work in more positions) - 0b01100010, // v (appears as superscript to work in more positions) - 0b10111110, // w (only works in position 0) - 0b01111110, // x - 0b01101110, // y - 0b00011011, // z - 0b00111001, // { - 0b00110000, // | - 0b00001111, // } - 0b00000001, // ~ -}; - -static const uint64_t Segment_Map[] = { - 0x4e4f0e8e8f8d4d0d, // Position 0, mode - 0xc8c4c4c8b4b4b0b, // Position 1, mode (Segments B and C shared, as are segments E and F) - 0xc049c00a49890949, // Position 2, day of month (Segments A, D, G shared; missing segment F) - 0xc048088886874707, // Position 3, day of month - 0xc053921252139352, // Position 4, clock hours (Segments A and D shared) - 0xc054511415559594, // Position 5, clock hours - 0xc057965616179716, // Position 6, clock minutes (Segments A and D shared) - 0xc041804000018a81, // Position 7, clock minutes - 0xc043420203048382, // Position 8, clock seconds - 0xc045440506468584, // Position 9, clock seconds -}; - -static const uint8_t Num_Chars = 10; - -static const uint32_t IndicatorSegments[6] = { - SLCD_SEGID(0, 17), // WATCH_INDICATOR_SIGNAL - SLCD_SEGID(0, 16), // WATCH_INDICATOR_BELL - SLCD_SEGID(2, 17), // WATCH_INDICATOR_PM - SLCD_SEGID(2, 16), // WATCH_INDICATOR_24H - SLCD_SEGID(1, 10), // WATCH_INDICATOR_LAP -}; - -void watch_enable_display() { - SEGMENT_LCD_0_init(); - slcd_sync_enable(&SEGMENT_LCD_0); -} - -inline void watch_set_pixel(uint8_t com, uint8_t seg) { - slcd_sync_seg_on(&SEGMENT_LCD_0, SLCD_SEGID(com, seg)); -} - -inline void watch_clear_pixel(uint8_t com, uint8_t seg) { - slcd_sync_seg_off(&SEGMENT_LCD_0, SLCD_SEGID(com, seg)); -} - -void watch_display_character(uint8_t character, uint8_t position) { - // handle lowercase 7 if needed - if (character == '7' && (position == 4 || position == 6)) character = '&'; - - uint64_t segmap = Segment_Map[position]; - uint64_t segdata = Character_Set[character - 0x20]; - - for (int i = 0; i < 8; i++) { - uint8_t com = (segmap & 0xFF) >> 6; - if (com > 2) { - // COM3 means no segment exists; skip it. - segmap = segmap >> 8; - segdata = segdata >> 1; - continue; - } - uint8_t seg = segmap & 0x3F; - slcd_sync_seg_off(&SEGMENT_LCD_0, SLCD_SEGID(com, seg)); - if (segdata & 1) slcd_sync_seg_on(&SEGMENT_LCD_0, SLCD_SEGID(com, seg)); - segmap = segmap >> 8; - segdata = segdata >> 1; - } -} - -void watch_display_string(char *string, uint8_t position) { - size_t i = 0; - while(string[i] != 0) { - watch_display_character(string[i], position + i); - i++; - if (i >= Num_Chars) break; - } -} - -inline void watch_set_colon() { - slcd_sync_seg_on(&SEGMENT_LCD_0, SLCD_SEGID(1, 16)); -} - -inline void watch_clear_colon() { - slcd_sync_seg_off(&SEGMENT_LCD_0, SLCD_SEGID(1, 16)); -} - -inline void watch_set_indicator(WatchIndicatorSegment indicator) { - slcd_sync_seg_on(&SEGMENT_LCD_0, IndicatorSegments[indicator]); -} - -inline void watch_clear_indicator(WatchIndicatorSegment indicator) { - slcd_sync_seg_off(&SEGMENT_LCD_0, IndicatorSegments[indicator]); -} - -void watch_clear_all_indicators() { - slcd_sync_seg_off(&SEGMENT_LCD_0, SLCD_SEGID(2, 17)); - slcd_sync_seg_off(&SEGMENT_LCD_0, SLCD_SEGID(2, 16)); - slcd_sync_seg_off(&SEGMENT_LCD_0, SLCD_SEGID(0, 17)); - slcd_sync_seg_off(&SEGMENT_LCD_0, SLCD_SEGID(0, 16)); - slcd_sync_seg_off(&SEGMENT_LCD_0, SLCD_SEGID(1, 10)); -} - - -////////////////////////////////////////////////////////////////////////////////////////// -// Buttons - -void watch_enable_buttons() { - EXTERNAL_IRQ_0_init(); -} - -void watch_register_button_callback(const uint8_t pin, ext_irq_cb_t callback) { - if (pin == BTN_ALARM) { - gpio_set_pin_direction(BTN_ALARM, GPIO_DIRECTION_IN); - gpio_set_pin_pull_mode(BTN_ALARM, GPIO_PULL_DOWN); - gpio_set_pin_function(BTN_ALARM, PINMUX_PA02G_RTC_IN2); - btn_alarm_callback = callback; - _extwake_register_callback(&CALENDAR_0.device, extwake_callback); - } else { - ext_irq_register(pin, callback); - } -} - -////////////////////////////////////////////////////////////////////////////////////////// -// LED - -bool PWM_0_enabled = false; - -void watch_enable_led(bool pwm) { - if (pwm) { - if (PWM_0_enabled) return; - - PWM_0_init(); - pwm_set_parameters(&PWM_0, 10000, 0); - pwm_enable(&PWM_0); - - PWM_0_enabled = true; - } else { - watch_enable_digital_output(RED); - watch_enable_digital_output(GREEN); - } - watch_set_led_off(); -} - -void watch_disable_led(bool pwm) { - if (pwm) { - if (!PWM_0_enabled) return; - pwm_disable(&PWM_0); - PWM_0_enabled = false; - } - - watch_disable_digital_output(RED); - watch_disable_digital_output(GREEN); -} - -void watch_set_led_color(uint16_t red, uint16_t green) { - if (PWM_0_enabled) { - TC3->COUNT16.CC[0].reg = red; - TC3->COUNT16.CC[1].reg = green; - } -} - -void watch_set_led_red() { - if (PWM_0_enabled) { - watch_set_led_color(65535, 0); - } else { - watch_set_pin_level(RED, true); - watch_set_pin_level(GREEN, false); - } -} - -void watch_set_led_green() { - if (PWM_0_enabled) { - watch_set_led_color(65535, 0); - } else { - watch_set_pin_level(RED, false); - watch_set_pin_level(GREEN, true); - } -} - -void watch_set_led_yellow() { - if (PWM_0_enabled) { - watch_set_led_color(65535, 65535); - } else { - watch_set_pin_level(RED, true); - watch_set_pin_level(GREEN, true); - } -} - -void watch_set_led_off() { - if (PWM_0_enabled) { - watch_set_led_color(0, 0); - } else { - watch_set_pin_level(RED, false); - watch_set_pin_level(GREEN, false); - } -} - - -////////////////////////////////////////////////////////////////////////////////////////// -// Buzzer - -inline void watch_enable_buzzer() { - PWM_1_init(); -} - -inline void watch_set_buzzer_period(uint32_t period) { - pwm_set_parameters(&PWM_1, period, period / 2); -} - -inline void watch_set_buzzer_on() { - pwm_enable(&PWM_1); -} - -inline void watch_set_buzzer_off() { - pwm_disable(&PWM_1); -} - -const uint16_t NotePeriods[108] = {31047, 29301, 27649, 26079, 24617, 23224, 21923, 20683, 19515, 18418, 17377, 16399, 15477, 14603, 13780, 13004, 12272, 11580, 10926, 10311, 9730, 9181, 8664, 8175, 7714, 7280, 6869, 6483, 6117, 5772, 5447, 5140, 4850, 4577, 4319, 4076, 3846, 3629, 3425, 3232, 3050, 2878, 2715, 2562, 2418, 2282, 2153, 2032, 1917, 1809, 1707, 1611, 1520, 1435, 1354, 1277, 1205, 1137, 1073, 1013, 956, 902, 851, 803, 758, 715, 675, 637, 601, 567, 535, 505, 476, 450, 424, 400, 378, 357, 336, 317, 300, 283, 267, 252, 238, 224, 212, 200, 188, 178, 168, 158, 149, 141, 133, 125, 118, 112, 105, 99, 94, 89, 84, 79, 74, 70, 66, 63}; - -void watch_buzzer_play_note(BuzzerNote note, uint16_t duration_ms) { - if (note == BUZZER_NOTE_REST) { - watch_set_buzzer_off(); - } else { - pwm_set_parameters(&PWM_1, NotePeriods[note], NotePeriods[note] / 2); - watch_set_buzzer_on(); - } - delay_ms(duration_ms); - watch_set_buzzer_off(); -} - -////////////////////////////////////////////////////////////////////////////////////////// -// Real-time Clock - -bool _watch_rtc_is_enabled() { - return RTC->MODE0.CTRLA.bit.ENABLE; -} - -void watch_set_date_time(struct calendar_date_time date_time) { - calendar_set_date(&CALENDAR_0, &date_time.date); - calendar_set_time(&CALENDAR_0, &date_time.time); -} - -void watch_get_date_time(struct calendar_date_time *date_time) { - calendar_get_date_time(&CALENDAR_0, date_time); -} - -void watch_register_tick_callback(ext_irq_cb_t callback) { - _prescaler_register_callback(&CALENDAR_0.device, callback); -} - -////////////////////////////////////////////////////////////////////////////////////////// -// Analog Input - -static bool ADC_0_ENABLED = false; - -void watch_enable_analog(const uint8_t pin) { - if (!ADC_0_ENABLED) ADC_0_init(); - ADC_0_ENABLED = true; - - gpio_set_pin_direction(pin, GPIO_DIRECTION_OFF); - switch (pin) { - case A0: - gpio_set_pin_function(A0, PINMUX_PB04B_ADC_AIN12); - break; - case A1: - gpio_set_pin_function(A1, PINMUX_PB01B_ADC_AIN9); - break; - case A2: - gpio_set_pin_function(A2, PINMUX_PB02B_ADC_AIN10); - break; - default: - return; - } -} - -////////////////////////////////////////////////////////////////////////////////////////// -// Digital IO - -void watch_enable_digital_input(const uint8_t pin) { - gpio_set_pin_direction(pin, GPIO_DIRECTION_IN); - gpio_set_pin_function(pin, GPIO_PIN_FUNCTION_OFF); -} - -void watch_enable_pull_up(const uint8_t pin) { - gpio_set_pin_pull_mode(pin, GPIO_PULL_UP); -} - -void watch_enable_pull_down(const uint8_t pin) { - gpio_set_pin_pull_mode(pin, GPIO_PULL_DOWN); -} - -bool watch_get_pin_level(const uint8_t pin) { - return gpio_get_pin_level(pin); -} - -void watch_enable_digital_output(const uint8_t pin) { - gpio_set_pin_direction(pin, GPIO_DIRECTION_OUT); - gpio_set_pin_function(pin, GPIO_PIN_FUNCTION_OFF); -} - -void watch_disable_digital_output(const uint8_t pin) { - gpio_set_pin_direction(pin, GPIO_DIRECTION_OFF); -} - -void watch_set_pin_level(const uint8_t pin, const bool level) { - gpio_set_pin_level(pin, level); -} - -////////////////////////////////////////////////////////////////////////////////////////// -// I2C - -struct io_descriptor *I2C_0_io; - -void watch_enable_i2c() { - I2C_0_init(); - i2c_m_sync_get_io_descriptor(&I2C_0, &I2C_0_io); - i2c_m_sync_enable(&I2C_0); -} - -void watch_i2c_send(int16_t addr, uint8_t *buf, uint16_t length) { - i2c_m_sync_set_periphaddr(&I2C_0, addr, I2C_M_SEVEN); - io_write(I2C_0_io, buf, length); -} - -void watch_i2c_receive(int16_t addr, uint8_t *buf, uint16_t length) { - i2c_m_sync_set_periphaddr(&I2C_0, addr, I2C_M_SEVEN); - io_read(I2C_0_io, buf, length); -} - -void watch_i2c_write8(int16_t addr, uint8_t reg, uint8_t data) { - uint8_t buf[2]; - buf[0] = reg; - buf[1] = data; - - watch_i2c_send(addr, (uint8_t *)&buf, 2); -} - -uint8_t watch_i2c_read8(int16_t addr, uint8_t reg) { - uint8_t data; - - watch_i2c_send(addr, (uint8_t *)®, 1); - watch_i2c_receive(addr, (uint8_t *)&data, 1); - - return data; -} - -uint16_t watch_i2c_read16(int16_t addr, uint8_t reg) { - uint16_t data; - - watch_i2c_send(addr, (uint8_t *)®, 1); - watch_i2c_receive(addr, (uint8_t *)&data, 2); - - return data; -} - -uint32_t watch_i2c_read24(int16_t addr, uint8_t reg) { - uint32_t data; - data = 0; - - watch_i2c_send(addr, (uint8_t *)®, 1); - watch_i2c_receive(addr, (uint8_t *)&data, 3); - - return data << 8; -} - -uint32_t watch_i2c_read32(int16_t addr, uint8_t reg) { - uint32_t data; - - watch_i2c_send(addr, (uint8_t *)®, 1); - watch_i2c_receive(addr, (uint8_t *)&data, 4); - - return data; -} - -////////////////////////////////////////////////////////////////////////////////////////// -// Debug UART - -/* - * UART methods are Copyright (c) 2014-2017, Alex Taradov <alex@taradov.com> - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * - * 1. Redistributions of source code must retain the above copyright notice, - * this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. The name of the author may not be used to endorse or promote products - * derived from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE - * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ - -void watch_enable_debug_uart(uint32_t baud) { - uint64_t br = (uint64_t)65536 * (CONF_CPU_FREQUENCY - 16 * baud) / CONF_CPU_FREQUENCY; - - gpio_set_pin_direction(D1, GPIO_DIRECTION_IN); - gpio_set_pin_function(D1, PINMUX_PB00C_SERCOM3_PAD2); - - MCLK->APBCMASK.reg |= MCLK_APBCMASK_SERCOM3; - - GCLK->PCHCTRL[SERCOM3_GCLK_ID_CORE].reg = GCLK_PCHCTRL_GEN(0) | GCLK_PCHCTRL_CHEN; - while (0 == (GCLK->PCHCTRL[SERCOM3_GCLK_ID_CORE].reg & GCLK_PCHCTRL_CHEN)); - - SERCOM3->USART.CTRLA.reg = - SERCOM_USART_CTRLA_DORD | SERCOM_USART_CTRLA_MODE(1/*USART_INT_CLK*/) | - SERCOM_USART_CTRLA_RXPO(0/*PAD0*/) | SERCOM_USART_CTRLA_TXPO(1/*PAD2*/); - - SERCOM3->USART.CTRLB.reg = SERCOM_USART_CTRLB_RXEN | SERCOM_USART_CTRLB_TXEN | - SERCOM_USART_CTRLB_CHSIZE(0/*8 bits*/); - - SERCOM3->USART.BAUD.reg = (uint16_t)br; - - SERCOM3->USART.CTRLA.reg |= SERCOM_USART_CTRLA_ENABLE; -} - -void watch_debug_putc(char c) { - while (!(SERCOM3->USART.INTFLAG.reg & SERCOM_USART_INTFLAG_DRE)); - SERCOM3->USART.DATA.reg = c; -} - -void watch_debug_puts(char *s) { - while (*s) watch_debug_putc(*s++); -} - -////////////////////////////////////////////////////////////////////////////////////////// -// Deep Sleep - -static void extwake_callback(uint8_t reason) { - if (reason & RTC_TAMPID_TAMPID2) { - if (btn_alarm_callback != NULL) btn_alarm_callback(); - } else if (reason & RTC_TAMPID_TAMPID1) { - if (a2_callback != NULL) a2_callback(); - } else if (reason & RTC_TAMPID_TAMPID0) { - if (d1_callback != NULL) d1_callback(); - } -} - -void watch_register_extwake_callback(uint8_t pin, ext_irq_cb_t callback) { - uint32_t pinmux; - if (pin == D1) { - d1_callback = callback; - pinmux = PINMUX_PB00G_RTC_IN0; - } else if (pin == A2) { - a2_callback = callback; - pinmux = PINMUX_PB02G_RTC_IN1; - } else { - return; - } - gpio_set_pin_direction(pin, GPIO_DIRECTION_IN); - gpio_set_pin_function(pin, pinmux); - _extwake_register_callback(&CALENDAR_0.device, extwake_callback); -} - -void watch_store_backup_data(uint32_t data, uint8_t reg) { - if (reg < 8) { - RTC->MODE0.BKUP[reg].reg = data; - } -} - -uint32_t watch_get_backup_data(uint8_t reg) { - if (reg < 8) { - return RTC->MODE0.BKUP[reg].reg; - } - - return 0; -} - -void watch_enter_deep_sleep() { - // enable and configure the external wake interrupt, if not already set up. - if (btn_alarm_callback == NULL && a2_callback == NULL && d1_callback == NULL) { - gpio_set_pin_direction(BTN_ALARM, GPIO_DIRECTION_IN); - gpio_set_pin_pull_mode(BTN_ALARM, GPIO_PULL_DOWN); - gpio_set_pin_function(BTN_ALARM, PINMUX_PA02G_RTC_IN2); - _extwake_register_callback(&CALENDAR_0.device, extwake_callback); - } - - // disable SLCD - slcd_sync_deinit(&SEGMENT_LCD_0); - hri_mclk_clear_APBCMASK_SLCD_bit(SLCD); - - // TODO: disable other peripherals - - // go into backup sleep mode - sleep(5); -} +#include "watch_rtc.c" +#include "watch_slcd.c" +#include "watch_extint.c" +#include "watch_led.c" +#include "watch_buzzer.c" +#include "watch_adc.c" +#include "watch_gpio.c" +#include "watch_i2c.c" +#include "watch_uart.c" +#include "watch_deepsleep.c" +#include "watch_private.c" diff --git a/watch-library/watch/watch.h b/watch-library/watch/watch.h index 2b8cd4e0..8c207ddb 100644 --- a/watch-library/watch/watch.h +++ b/watch-library/watch/watch.h @@ -26,23 +26,21 @@ #ifndef WATCH_H_ #define WATCH_H_ #include <stdint.h> +#include <stdbool.h> #include "driver_init.h" -#include "hpl_calendar.h" -#include "hal_ext_irq.h" -#include "notes.h" /** @mainpage Sensor Watch Documentation * @brief This documentation covers most of the functions you will use to interact with the Sensor Watch hardware. It is divided into the following sections: - @ref app - This section covers the functions that you will implement in your app.c file when designing a Sensor Watch app. + - @ref rtc - This section covers functions related to the SAM L22's real-time clock peripheral, including + date, time and alarm functions. - @ref slcd - This section covers functions related to the Segment LCD display driver, which is responsible for displaying strings of characters and indicators on the main watch display. - @ref buttons - This section covers functions related to the three buttons: Light, Mode and Alarm. - @ref led - This section covers functions related to the bi-color red/green LED mounted behind the LCD. - @ref buzzer - This section covers functions related to the piezo buzzer. - - @ref rtc - This section covers functions related to the SAM L22's real-time clock peripheral, including - date, time and alarm functions. - @ref adc - This section covers functions related to the SAM L22's analog-to-digital converter, as well as configuring and reading values from the three analog-capable pins on the 9-pin connector. - @ref gpio - This section covers functions related to general-purpose input and output signals. @@ -53,518 +51,18 @@ deepest sleep mode available on the SAM L22. */ -/** @addtogroup app Application Framework - * @brief This section covers the functions that you will implement in your app.c file when designing a Sensor Watch app. - * @details You should be able to write a watch app by simply implementing these functions and declaring callbacks for - * various GPIO and peripheral interrupts. The main.c file takes care of calling these functions for you. The - * general flow: - * - * 1. Your app_init() function is called. - * - This method should only be used to set your initial application state. - * 2. If your app is waking from BACKUP, app_wake_from_deep_sleep() is called. - * - If you saved state in the RTC's backup registers, you can restore it here. - * 3. Your app_setup() method is called. - * - You may wish to enable some functionality and peripherals here. - * - You should definitely set up some interrupts here. - * 4. The main run loop begins: your app_loop() function is called. - * - Run code and update your UI here. - * - Return true if your app is prepared to enter STANDBY mode. - * 5. This step differs depending on the value returned by app_loop: - * - If you returned false, execution resumes at (4). - * - If you returned true, app_prepare_for_sleep() is called; execution moves on to (6). - * 6. The microcontroller enters the STANDBY sleep mode. - * - No user code will run, and the watch will enter a low power mode. - * - The watch will remain in this state until an interrupt wakes it. - * 7. Once woken from STANDBY, your app_wake_from_sleep() function is called. - * - After this, execution resumes at (4). - */ -/// @{ -/** @brief A function you will implement to initialize your application state. The app_init function is called before - * anything else. Use it to set up any internal data structures or application state required by your app, - * but don't configure any peripherals just yet. - */ -void app_init(); - -/** @brief A function you will implement to wake from deep sleep mode. The app_wake_from_deep_sleep function is only - * called if your app is waking from the ultra-low power BACKUP sleep mode. You may have chosen to store some - * state in the RTC's backup registers prior to entering this mode. You may restore that state here. - */ -void app_wake_from_deep_sleep(); - -/** @brief A function you will implement to set up your application. The app_setup function is like setup() in Arduino. - * It is called once when the program begins. You should set pin modes and enable any peripherals you want to - * set up (real-time clock, I2C, etc.) Depending on your application, you may or may not want to configure - * sensors on your sensor board here. For example, a low-power accelerometer that will run at all times should - * be configured here, whereas you may want to enable a more power-hungry sensor only when you need it. - * @note If your app enters the ultra-low power BACKUP sleep mode, this function will be called again when it wakes - * from that deep sleep state. In this state, the RTC will still be configured with the correct date and time. - */ -void app_setup(); - -/** @brief A function you will implement to serve as the app's main run loop. This method will be called repeatedly, - or if you enter STANDBY sleep mode, as soon as the device wakes from sleep. - * @return You should return true if your app is prepared to enter STANDBY sleep mode. If you return false, your - * app's app_loop method will be called again immediately. Note that in STANDBY mode, the watch will consume - * only about 95 microamperes of power, whereas if you return false and keep the app awake, it will consume - * about 355 microamperes. This is the difference between months of battery life and days. As much as - * possible, you should limit the amount of time your app spends awake. - * @note Only the RTC, the segment LCD controller and the external interrupt controller run in STANDBY mode. If you - * are using, e.g. the PWM function to set a custom LED color, you should return false here until you are - * finished with that operation. Note however that the peripherals will continue running after waking up, - * so e.g. the I2C controller, if configured, will sleep in STANDBY. But you can use it again as soon as your - * app wakes up. - */ -bool app_loop(); - -/** @brief A function you will implement to prepare to enter STANDBY sleep mode. The app_prepare_for_sleep function is - * called before the watch goes into the STANDBY sleep mode. In STANDBY mode, most peripherals are shut down, - * and no code will run until the watch receives an interrupt (generally either the 1Hz tick or a press on one - * of the buttons). - * @note If you are PWM'ing the LED or playing a sound on the buzzer, the TC/TCC peripherals that drive those operations - * will not run in STANDBY. BUT! the output pins will retain the state they had when entering standby. This means - * you could end up entering standby with an LED on and draining power, or with a DC potential across the piezo - * buzzer that could damage it if left in this state. If your app_loop does not prevent sleep during these - * activities, you should make sure to disable these outputs in app_prepare_for_sleep. - */ -void app_prepare_for_sleep(); - -/** @brief A method you will implement to configure the app after waking from STANDBY sleep mode. - */ -void app_wake_from_sleep(); - -/// Called by main.c while setting up the app. You should not call this from your app. -void _watch_init(); -/// @} - - -/** @addtogroup slcd Segment LCD Display - * @brief This section covers functions related to the Segment LCD display driver, which is responsible - * for displaying strings of characters and indicators on the main watch display. - * @details The segment LCD controller consumes about 3 microamperes of power with no segments on, and - * about 4 microamperes with all segments on. There is also a slight power impact associated - * with updating the screen (about 1 microampere to update at 1 Hz). For the absolute lowest - * power operation, update the display only when its contents have changed, and disable the - * SLCD peripheral when the screen is not in use. - * For a map of all common and segment pins, see <a href="segmap.html">segmap.html</a>. You can - * hover over any segment in that diagram to view the common and segment pins associated with - * each segment of the display. - */ -/// @{ - -/// An enum listing the icons and indicators available on the watch. -typedef enum WatchIndicatorSegment { - WATCH_INDICATOR_SIGNAL = 0, ///< The hourly signal indicator; also useful for indicating that sensors are on. - WATCH_INDICATOR_BELL, ///< The small bell indicating that an alarm is set. - WATCH_INDICATOR_PM, ///< The PM indicator, indicating that a time is in the afternoon. - WATCH_INDICATOR_24H, ///< The 24H indicator, indicating that the watch is in a 24-hour mode. - WATCH_INDICATOR_LAP ///< The LAP indicator; the F-91W uses this in its stopwatch UI. -} WatchIndicatorSegment; - -/** @brief Enables the Segment LCD display. - * Call this before attempting to set pixels or display strings. - */ -void watch_enable_display(); - -/** @brief Sets a pixel. Use this to manually set a pixel with a given common and segment number. - * See <a href="segmap.html">segmap.html</a>. - * @param com the common pin, numbered from 0-2. - * @param seg the segment pin, numbered from 0-23. - */ -void watch_set_pixel(uint8_t com, uint8_t seg); - -/** @brief Clears a pixel. Use this to manually clear a pixel with a given common and segment number. - * See <a href="segmap.html">segmap.html</a>. - * @param com the common pin, numbered from 0-2. - * @param seg the segment pin, numbered from 0-23. - */ -void watch_clear_pixel(uint8_t com, uint8_t seg); - -/** @brief Displays a string at the given position, starting from the top left. There are ten digits. - A space in any position will clear that digit. - * @param string A null-terminated string. - * @param position The position where you wish to start displaying the string. The day of week digits - * are positions 0 and 1; the day of month digits are positions 2 and 3, and the main - * clock line occupies positions 4-9. - * @note This method does not clear the display; if for example you display a two-character string at - position 0, positions 2-9 will retain whatever state they were previously displaying. - */ -void watch_display_string(char *string, uint8_t position); - -/** @brief Turns the colon segment on. - */ -void watch_set_colon(); - -/** @brief Turns the colon segment off. - */ -void watch_clear_colon(); - -/** @brief Sets an indicator on the LCD. Use this to turn on one of the indicator segments. - * @param indicator One of the indicator segments from the enum. @see WatchIndicatorSegment - */ -void watch_set_indicator(WatchIndicatorSegment indicator); - -/** @brief Clears an indicator on the LCD. Use this to turn off one of the indicator segments. - * @param indicator One of the indicator segments from the enum. @see WatchIndicatorSegment - */ -void watch_clear_indicator(WatchIndicatorSegment indicator); - -/** @brief Clears all indicator segments. - * @see WatchIndicatorSegment - */ -void watch_clear_all_indicators(); - -/// @} - - -/** @addtogroup led LED Control - * @brief This section covers functions related to the bi-color red/green LED mounted behind the LCD. - * @details The SAM L22 is an exceedingly power efficient chip, whereas the LED's are relatively power- - * hungry. The green LED, at full power, consumes more power than the whole chip in active mode, - * and the red LED consumes about twelve times as much power! The LED's should thus be used only - * sparingly in order to preserve battery life. - * @todo Explore running the TC3 PWM driver in standby mode; this would require that the user disable it - * in app_prepare_for_sleep, but could allow for low power, low duty indicator LED usage. - */ -/// @{ -/** @brief Enables the LED. - * @param pwm if true, enables PWM output for brightness control (required to use @ref watch_set_led_color). - If false, configures the LED pins as digital outputs. - * @note The TC driver required for PWM mode does not run in STANDBY mode. You should keep your app awake - while PWM'ing the LED's, and disable them before going to sleep. - */ -void watch_enable_led(bool pwm); - -/** @brief Disables the LEDs. - * @param pwm if true, disables the PWM output. If false, disables the digital outputs. - */ -void watch_disable_led(bool pwm); - -/** @brief Sets the LED to a custom color by modulating each output's duty cycle. - * @param red The red value. - * @param green The green value. - * @note still working on this, 0-65535 works now but these values may change. - */ -void watch_set_led_color(uint16_t red, uint16_t green); - -/** @brief Sets the red LED to full brightness, and turns the green LED off. - * @note Of the two LED's in the RG bi-color LED, the red LED is the less power-efficient one (~4.5 mA). - */ -void watch_set_led_red(); - -/** @brief Sets the green LED to full brightness, and turns the red LED off. - * @note Of the two LED's in the RG bi-color LED, the green LED is the more power-efficient one (~0.44 mA). - */ -void watch_set_led_green(); - -/** @brief Sets both red and green LEDs to full brightness. - * @note The total current draw between the two LED's in this mode will be ~5 mA, which is more than the - * watch draws in any other mode. Take care not to drain the battery. - */ -void watch_set_led_yellow(); - -/** @brief Turns both the red and the green LEDs off. */ -void watch_set_led_off(); -/// @} - - -/** @addtogroup buzzer Buzzer - * @brief This section covers functions related to the piezo buzzer embedded in the F-91W's back plate. - */ -/// @{ -/** @brief Enables the TCC peripheral, which drives the buzzer. - */ -void watch_enable_buzzer(); - -/** @brief Sets the period of the buzzer. - * @param period The period of a single cycle for the PWM peripheral. You can use the following formula to - * convert a desired frequency to a period for this function: period = 513751 * (freq^−1.0043) - */ -void watch_set_buzzer_period(uint32_t period); - -/** @brief Turns the buzzer output on. It will emit a continuous sound at the given frequency. - * @note The TCC peripheral that drives the buzzer does not run in standby mode; if you wish for buzzer - * output to continue, you should prevent your app from going to sleep. - */ -void watch_set_buzzer_on(); - -/** @brief Turns the buzzer output off. - */ -void watch_set_buzzer_off(); - -/** @brief Plays the given note for a set duration. - * @param note The note you wish to play, or BUZZER_NOTE_REST to disable output for the given duration. - * @param duration_ms The duration of the note. - * @note Note that this will block your UI for the duration of the note's play time, and it will - * after this call, the buzzer period will be set to the period of this note. - */ -void watch_buzzer_play_note(BuzzerNote note, uint16_t duration_ms); - -/** @brief An array of periods for all the notes on a piano, corresponding to the names in BuzzerNote. - */ -extern const uint16_t NotePeriods[108]; - -/// @} - - -/** @addtogroup rtc Real-Time Clock - * @brief This section covers functions related to the SAM L22's real-time clock peripheral, including - * date, time and alarm functions. - * @details The real-time clock is the only peripheral that main.c enables for you. It is the cornerstone - * of low power operation on the watch, and it is required for several key functions that we - * assume will be available, namely the wake from BACKUP mode and the callback on the ALARM button. - * It is also required for the operation of the 1 Hz tick interrupt, which you will most likely use - * to wake from STANDBY mode. - */ -/// @{ -/** @brief Called by main.c to check if the RTC is enabled. - * You may call this function, but outside of app_init, it sbould always return true. - */ -bool _watch_rtc_is_enabled(); - -/** @brief Sets the system date and time. - * @param date_time A struct representing the date and time you wish to set. - */ -void watch_set_date_time(struct calendar_date_time date_time); - -/** @brief Returns the system date and time in the provided struct. - * @param date_time A pointer to a calendar_date_time struct. - It will be populated with the correct date and time on return. - */ -void watch_get_date_time(struct calendar_date_time *date_time); - -/** @brief Registers a "tick" callback that will be called once per second. - * @param callback The function you wish to have called when the clock ticks. - */ -void watch_register_tick_callback(ext_irq_cb_t callback); -/// @} - - -/** @addtogroup adc Analog Input - * @brief This section covers functions related to the SAM L22's analog-to-digital converter, as well as - * configuring and reading values from the three analog-capable pins on the 9-pin connector. - */ -/// @{ -/** @brief Enables the ADC peripheral, and configures the selected pin for analog input. - * @param pin One of pins A0, A1 or A2. - */ -void watch_enable_analog(const uint8_t pin); -/// @} - - -/** @addtogroup buttons Buttons - * @brief This section covers functions related to the three buttons: Light, Mode and Alarm. - * @details The buttons are the core input UI of the watch, and the way the user will interact with - * your application. They are active high, pulled down by the microcontroller, and triggered - * when one of the "pushers" brings a tab from the metal frame into contact with the edge - * of the board. Note that the buttons can only wake the watch from STANDBY mode (except maybe for the - * ALARM button; still working on that one). The external interrupt controller runs in - STANDBY mode, but it does not runin BACKUP mode; to wake from BACKUP, buttons will not cut it, - */ -/// @{ -/** @brief Enables the external interrupt controller for use with the buttons. - * @note The BTN_ALARM button runs off of an interrupt in the the RTC controller, not the EIC. If your - * application ONLY makes use of the alarm button, you do not need to call this method; you can - * save ~5µA by leaving the EIC disabled and only registering a callback for BTN_ALARM. - */ -void watch_enable_buttons(); - -/** @brief Configures an external interrupt on one of the button pins. - * @param pin One of pins BTN_LIGHT, BTN_MODE or BTN_ALARM. - * @param callback The function you wish to have called when the button is pressed. - * @note The BTN_ALARM button runs off of an interrupt in the the RTC controller, not the EIC. This - * implementation detail should not make any difference to your app, - */ -void watch_register_button_callback(const uint8_t pin, ext_irq_cb_t callback); -/// @} - - -/** @addtogroup gpio Digital Input and Output - * @brief This section covers functions related to general-purpose input and output signals. - */ -/// @{ -/** @brief Configures the selected pin for digital input. - * @param pin The pin that you wish to act as an input. - */ -void watch_enable_digital_input(const uint8_t pin); - -/** @brief Enables a pull-up resistor on the selected pin. - * @param pin The pin that you wish to configure. - */ -void watch_enable_pull_up(const uint8_t pin); - -/** @brief Enables a pull-down resistor on the selected pin. - * @param pin The pin that you wish to configure. - */ -void watch_enable_pull_down(const uint8_t pin); - -/** @brief Gets the level of the selected pin. - * @param pin The pin whose value you wish to read. - * @return true if the pin was logic high; otherwise, false. - */ -bool watch_get_pin_level(const uint8_t pin); - -/** @brief Configures the selected pin for digital output. - * @param pin The pin that you wish to act as an output. - */ -void watch_enable_digital_output(const uint8_t pin); - -/** @brief Disables digital output on the selected pin. - * @param pin The pin that you wish disable. - */ -void watch_disable_digital_output(const uint8_t pin); - -/** @brief Sets the level of the selected pin. - * @param pin The pin whose value you wish to set. - * @param level The level you wish to set: true for high, false for low. - */ -void watch_set_pin_level(const uint8_t pin, const bool level); -/// @} - - -/** @addtogroup i2c I2C Controller Driver - * @brief This section covers functions related to the SAM L22's built-I2C driver, including - * configuring the I2C bus, putting values directly on the bus and reading data from - * registers on I2C devices. - */ -/// @{ -/** @brief Enables the I2C peripheral. Call this before attempting to interface with I2C devices. - */ -void watch_enable_i2c(); - -/** @brief Sends a series of values to a device on the I2C bus. - * @param addr The address of the device you wish to talk to. - * @param buf A series of unsigned bytes; the data you wish to transmit. - * @param length The number of bytes in buf that you wish to send. - */ -void watch_i2c_send(int16_t addr, uint8_t *buf, uint16_t length); - -/** @brief Receives a series of values from a device on the I2C bus. - * @param addr The address of the device you wish to hear from. - * @param buf Storage for the incoming bytes; on return, it will contain the received data. - * @param length The number of bytes that you wish to receive. - */ -void watch_i2c_receive(int16_t addr, uint8_t *buf, uint16_t length); - -/** @brief Writes a byte to a register in an I2C device. - * @param addr The address of the device you wish to address. - * @param reg The register on the device that you wish to set. - * @param data The value that you wish to set the register to. - */ -void watch_i2c_write8(int16_t addr, uint8_t reg, uint8_t data); - -/** @brief Reads a byte from a register in an I2C device. - * @param addr The address of the device you wish to address. - * @param reg The register on the device that you wish to read. - * @return An unsigned byte representing the value of the register that was read. - */ -uint8_t watch_i2c_read8(int16_t addr, uint8_t reg); - -/** @brief Reads an unsigned little-endian word from a register in an I2C device. - * @param addr The address of the device you wish to address. - * @param reg The register on the device that you wish to read. - * @return An unsigned word representing the value of the register that was read. - * @note This reads two bytes into the word in bus order. If the device returns - the LSB first and then the MSB, you can use this value as returned. - If the device returns the data in big-endian order or uses some other - kind of fancy bit packing, you may need to shuffle some bits around. - */ -uint16_t watch_i2c_read16(int16_t addr, uint8_t reg); - -/** @brief Reads three bytes as an unsigned little-endian int from a register in an I2C device. - * @param addr The address of the device you wish to address. - * @param reg The register on the device that you wish to read. - * @return An unsigned word representing the value of the register that was read. - * @note This reads three bytes into the word in bus order. If the device returns - these bytes LSB first, you can use this value as returned. If there is a - sign bit, the device returns the data in big-endian order, or it uses some - other kind of fancy bit packing, you may need to shuffle some bits around. - */ -uint32_t watch_i2c_read24(int16_t addr, uint8_t reg); - - -/** @brief Reads an unsigned little-endian int from a register in an I2C device. - * @param addr The address of the device you wish to address. - * @param reg The register on the device that you wish to read. - * @return An unsigned word representing the value of the register that was read. - * @note This reads three bytes into the word in bus order. If the device returns - these bytes LSB first, you can use this value as returned. If the device - returns the data in big-endian order, or it uses some other kind of fancy - bit packing, you may need to shuffle some bits around. - */ -uint32_t watch_i2c_read32(int16_t addr, uint8_t reg); -/// @} - -/** @addtogroup debug Debug UART - * @brief This section covers functions related to the debug UART, available on - * pin D1 of the 9-pin connector. - * @todo Refactor this as a USB CDC so that folks can debug over USB. - */ -/// @{ -/** @brief Initializes the debug UART. - * @param baud The baud rate - */ -void watch_enable_debug_uart(uint32_t baud); - -/** @brief Outputs a single character on the debug UART. - * @param c The character you wish to output. - */ -void watch_debug_putc(char c); - -/** @brief Outputs a string on the debug UART. - * @param s A null-terminated string. - */ -void watch_debug_puts(char *s); -/// @} - - -/** @addtogroup deepsleep Deep Sleep Control - * @brief This section covers functions related to preparing for and entering BACKUP mode, the - * deepest sleep mode available on the SAM L22 - */ -/// @{ -/** @brief Registers a callback on one of the RTC's external wake pins, which can wake the device - * from deep sleep mode. - * @param pin Either pin A2 or pin D1, the two external wake pins on the nine-pin connector. - * @param callback The callback to be called if this pin triggers outside of deep sleep mode. - * @note When in normal or STANDBY mode, this will function much like a standard external interrupt - * situation: these pins will wake from standby, and your callback will be called. However, - * if the device enters deep sleep and one of these pins wakes the device, your callback - * WILL NOT be called. - */ -void watch_register_extwake_callback(uint8_t pin, ext_irq_cb_t callback); - -/** @brief Stores data in one of the RTC's backup registers, which retain their data in deep sleep. - * @param data An unsigned 32 bit integer with the data you wish to store. - * @param reg A register from 0-7. - */ -void watch_store_backup_data(uint32_t data, uint8_t reg); - -/** @brief Gets 32 bits of data from the RTC's backup register, which retains its data in deep sleep. - * @param reg A register from 0-7. - * @return An unsigned 32 bit integer with the from the backup register. - */ -uint32_t watch_get_backup_data(uint8_t reg); - -/** @brief Enters the SAM L22's lowest-power mode, BACKUP. - * @details This function does some housekeeping before entering BACKUP mode. It first disables all - * peripherals except for the RTC, and disables the tick interrupt (since that would wake) - * us up from deep sleep. It also sets an external wake source on the ALARM button, if one - * was not already set. If you wish to wake from another source, such as one of the external - * wake interrupt pins on the 9-pin connector, set that up prior to calling this function. - * @note If you have a callback set for an external wake interrupt, it will be called if triggered while - * in ACTIVE, IDLE or STANDBY modes, but it *will not be called* when waking from BACKUP. - * Waking from backup is effectively like waking from reset, except that your @ref - * app_wake_from_deep_sleep function will be called. - * @warning In initial testing, it seems like the ALARM_BTN pin (PA02 RTC/IN2) cannot wake the device - * from deep sleep mode. There is an errata note (Reference: 15010, linked) that says that - * due to a silicon bug, PB01 cannot be used as RTC/IN2. It seems though that this bug may - * also affect PA02. As a result — and I'm very bummed about this — you cannot use deep sleep - * mode unless you set up an external wake interrupt using a device on the nine-pin connector - * (i.e. an accelerometer with an interrupt pin). Otherwise your only option for waking will - * be to unscrew the watch case and press the reset button on the back of the board. - * http://ww1.microchip.com/downloads/en/DeviceDoc/SAM_L22_Family_Errata_DS80000782B.pdf - */ -void watch_enter_deep_sleep(); -/// @} +#include "watch_app.h" +#include "watch_rtc.h" +#include "watch_slcd.h" +#include "watch_extint.h" +#include "watch_led.h" +#include "watch_buzzer.h" +#include "watch_adc.h" +#include "watch_gpio.h" +#include "watch_i2c.h" +#include "watch_uart.h" +#include "watch_deepsleep.h" + +#include "watch_private.h" #endif /* WATCH_H_ */
\ No newline at end of file diff --git a/watch-library/watch/watch_adc.c b/watch-library/watch/watch_adc.c new file mode 100644 index 00000000..ebb8bb60 --- /dev/null +++ b/watch-library/watch/watch_adc.c @@ -0,0 +1,45 @@ +/* + * MIT License + * + * Copyright (c) 2020 Joey Castillo + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + + static bool ADC_0_ENABLED = false; + +void watch_enable_analog(const uint8_t pin) { + if (!ADC_0_ENABLED) ADC_0_init(); + ADC_0_ENABLED = true; + + gpio_set_pin_direction(pin, GPIO_DIRECTION_OFF); + switch (pin) { + case A0: + gpio_set_pin_function(A0, PINMUX_PB04B_ADC_AIN12); + break; + case A1: + gpio_set_pin_function(A1, PINMUX_PB01B_ADC_AIN9); + break; + case A2: + gpio_set_pin_function(A2, PINMUX_PB02B_ADC_AIN10); + break; + default: + return; + } +} diff --git a/watch-library/watch/watch_adc.h b/watch-library/watch/watch_adc.h new file mode 100644 index 00000000..d4620365 --- /dev/null +++ b/watch-library/watch/watch_adc.h @@ -0,0 +1,35 @@ +/* + * MIT License + * + * Copyright (c) 2020 Joey Castillo + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ +////< @file watch_adc.h + +/** @addtogroup adc Analog Input + * @brief This section covers functions related to the SAM L22's analog-to-digital converter, as well as + * configuring and reading values from the three analog-capable pins on the 9-pin connector. + */ +/// @{ +/** @brief Enables the ADC peripheral, and configures the selected pin for analog input. + * @param pin One of pins A0, A1 or A2. + */ +void watch_enable_analog(const uint8_t pin); +/// @} diff --git a/watch-library/watch/watch_app.c b/watch-library/watch/watch_app.c new file mode 100644 index 00000000..0fb87b9a --- /dev/null +++ b/watch-library/watch/watch_app.c @@ -0,0 +1,25 @@ +/* + * MIT License + * + * Copyright (c) 2020 Joey Castillo + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +
\ No newline at end of file diff --git a/watch-library/watch/watch_app.h b/watch-library/watch/watch_app.h new file mode 100644 index 00000000..fd7ea706 --- /dev/null +++ b/watch-library/watch/watch_app.h @@ -0,0 +1,105 @@ +/* + * MIT License + * + * Copyright (c) 2020 Joey Castillo + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ +////< @file watch_app.h + +/** @addtogroup app Application Framework + * @brief This section covers the functions that you will implement in your app.c file when designing a Sensor Watch app. + * @details You should be able to write a watch app by simply implementing these functions and declaring callbacks for + * various GPIO and peripheral interrupts. The main.c file takes care of calling these functions for you. The + * general flow: + * + * 1. Your app_init() function is called. + * - This method should only be used to set your initial application state. + * 2. If your app is waking from BACKUP, app_wake_from_deep_sleep() is called. + * - If you saved state in the RTC's backup registers, you can restore it here. + * 3. Your app_setup() method is called. + * - You may wish to enable some functionality and peripherals here. + * - You should definitely set up some interrupts here. + * 4. The main run loop begins: your app_loop() function is called. + * - Run code and update your UI here. + * - Return true if your app is prepared to enter STANDBY mode. + * 5. This step differs depending on the value returned by app_loop: + * - If you returned false, execution resumes at (4). + * - If you returned true, app_prepare_for_sleep() is called; execution moves on to (6). + * 6. The microcontroller enters the STANDBY sleep mode. + * - No user code will run, and the watch will enter a low power mode. + * - The watch will remain in this state until an interrupt wakes it. + * 7. Once woken from STANDBY, your app_wake_from_sleep() function is called. + * - After this, execution resumes at (4). + */ +/// @{ +/** @brief A function you will implement to initialize your application state. The app_init function is called before + * anything else. Use it to set up any internal data structures or application state required by your app, + * but don't configure any peripherals just yet. + */ +void app_init(); + +/** @brief A function you will implement to wake from deep sleep mode. The app_wake_from_deep_sleep function is only + * called if your app is waking from the ultra-low power BACKUP sleep mode. You may have chosen to store some + * state in the RTC's backup registers prior to entering this mode. You may restore that state here. + */ +void app_wake_from_deep_sleep(); + +/** @brief A function you will implement to set up your application. The app_setup function is like setup() in Arduino. + * It is called once when the program begins. You should set pin modes and enable any peripherals you want to + * set up (real-time clock, I2C, etc.) Depending on your application, you may or may not want to configure + * sensors on your sensor board here. For example, a low-power accelerometer that will run at all times should + * be configured here, whereas you may want to enable a more power-hungry sensor only when you need it. + * @note If your app enters the ultra-low power BACKUP sleep mode, this function will be called again when it wakes + * from that deep sleep state. In this state, the RTC will still be configured with the correct date and time. + */ +void app_setup(); + +/** @brief A function you will implement to serve as the app's main run loop. This method will be called repeatedly, + or if you enter STANDBY sleep mode, as soon as the device wakes from sleep. + * @return You should return true if your app is prepared to enter STANDBY sleep mode. If you return false, your + * app's app_loop method will be called again immediately. Note that in STANDBY mode, the watch will consume + * only about 95 microamperes of power, whereas if you return false and keep the app awake, it will consume + * about 355 microamperes. This is the difference between months of battery life and days. As much as + * possible, you should limit the amount of time your app spends awake. + * @note Only the RTC, the segment LCD controller and the external interrupt controller run in STANDBY mode. If you + * are using, e.g. the PWM function to set a custom LED color, you should return false here until you are + * finished with that operation. Note however that the peripherals will continue running after waking up, + * so e.g. the I2C controller, if configured, will sleep in STANDBY. But you can use it again as soon as your + * app wakes up. + */ +bool app_loop(); + +/** @brief A function you will implement to prepare to enter STANDBY sleep mode. The app_prepare_for_sleep function is + * called before the watch goes into the STANDBY sleep mode. In STANDBY mode, most peripherals are shut down, + * and no code will run until the watch receives an interrupt (generally either the 1Hz tick or a press on one + * of the buttons). + * @note If you are PWM'ing the LED or playing a sound on the buzzer, the TC/TCC peripherals that drive those operations + * will not run in STANDBY. BUT! the output pins will retain the state they had when entering standby. This means + * you could end up entering standby with an LED on and draining power, or with a DC potential across the piezo + * buzzer that could damage it if left in this state. If your app_loop does not prevent sleep during these + * activities, you should make sure to disable these outputs in app_prepare_for_sleep. + */ +void app_prepare_for_sleep(); + +/** @brief A method you will implement to configure the app after waking from STANDBY sleep mode. + */ +void app_wake_from_sleep(); + +/// @} diff --git a/watch-library/watch/watch_buzzer.c b/watch-library/watch/watch_buzzer.c new file mode 100644 index 00000000..04746416 --- /dev/null +++ b/watch-library/watch/watch_buzzer.c @@ -0,0 +1,52 @@ +/* + * MIT License + * + * Copyright (c) 2020 Joey Castillo + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + + inline void watch_enable_buzzer() { + PWM_1_init(); +} + +inline void watch_set_buzzer_period(uint32_t period) { + pwm_set_parameters(&PWM_1, period, period / 2); +} + +inline void watch_set_buzzer_on() { + pwm_enable(&PWM_1); +} + +inline void watch_set_buzzer_off() { + pwm_disable(&PWM_1); +} + +const uint16_t NotePeriods[108] = {31047, 29301, 27649, 26079, 24617, 23224, 21923, 20683, 19515, 18418, 17377, 16399, 15477, 14603, 13780, 13004, 12272, 11580, 10926, 10311, 9730, 9181, 8664, 8175, 7714, 7280, 6869, 6483, 6117, 5772, 5447, 5140, 4850, 4577, 4319, 4076, 3846, 3629, 3425, 3232, 3050, 2878, 2715, 2562, 2418, 2282, 2153, 2032, 1917, 1809, 1707, 1611, 1520, 1435, 1354, 1277, 1205, 1137, 1073, 1013, 956, 902, 851, 803, 758, 715, 675, 637, 601, 567, 535, 505, 476, 450, 424, 400, 378, 357, 336, 317, 300, 283, 267, 252, 238, 224, 212, 200, 188, 178, 168, 158, 149, 141, 133, 125, 118, 112, 105, 99, 94, 89, 84, 79, 74, 70, 66, 63}; + +void watch_buzzer_play_note(BuzzerNote note, uint16_t duration_ms) { + if (note == BUZZER_NOTE_REST) { + watch_set_buzzer_off(); + } else { + pwm_set_parameters(&PWM_1, NotePeriods[note], NotePeriods[note] / 2); + watch_set_buzzer_on(); + } + delay_ms(duration_ms); + watch_set_buzzer_off(); +} diff --git a/watch-library/watch/notes.h b/watch-library/watch/watch_buzzer.h index bc4a3fa2..75b30a79 100644 --- a/watch-library/watch/notes.h +++ b/watch-library/watch/watch_buzzer.h @@ -21,7 +21,31 @@ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ -////< @file notes.h +////< @file watch_buzzer.h + +/** @addtogroup buzzer Buzzer + * @brief This section covers functions related to the piezo buzzer embedded in the F-91W's back plate. + */ +/// @{ +/** @brief Enables the TCC peripheral, which drives the buzzer. + */ +void watch_enable_buzzer(); + +/** @brief Sets the period of the buzzer. + * @param period The period of a single cycle for the PWM peripheral. You can use the following formula to + * convert a desired frequency to a period for this function: period = 513751 * (freq^−1.0043) + */ +void watch_set_buzzer_period(uint32_t period); + +/** @brief Turns the buzzer output on. It will emit a continuous sound at the given frequency. + * @note The TCC peripheral that drives the buzzer does not run in standby mode; if you wish for buzzer + * output to continue, you should prevent your app from going to sleep. + */ +void watch_set_buzzer_on(); + +/** @brief Turns the buzzer output off. + */ +void watch_set_buzzer_off(); /// @brief 108 notes for use with watch_buzzer_play_note typedef enum BuzzerNote { @@ -135,3 +159,16 @@ typedef enum BuzzerNote { BUZZER_NOTE_B8, ///< 7902.13 Hz BUZZER_NOTE_REST ///< no sound } BuzzerNote; + +/** @brief Plays the given note for a set duration. + * @param note The note you wish to play, or BUZZER_NOTE_REST to disable output for the given duration. + * @param duration_ms The duration of the note. + * @note Note that this will block your UI for the duration of the note's play time, and it will + * after this call, the buzzer period will be set to the period of this note. + */ +void watch_buzzer_play_note(BuzzerNote note, uint16_t duration_ms); + +/// @brief An array of periods for all the notes on a piano, corresponding to the names in BuzzerNote. +extern const uint16_t NotePeriods[108]; + +/// @} diff --git a/watch-library/watch/watch_deepsleep.c b/watch-library/watch/watch_deepsleep.c new file mode 100644 index 00000000..53a41b5c --- /dev/null +++ b/watch-library/watch/watch_deepsleep.c @@ -0,0 +1,85 @@ +/* + * MIT License + * + * Copyright (c) 2020 Joey Castillo + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +ext_irq_cb_t a2_callback; +ext_irq_cb_t d1_callback; + + static void extwake_callback(uint8_t reason) { + if (reason & RTC_TAMPID_TAMPID2) { + if (btn_alarm_callback != NULL) btn_alarm_callback(); + } else if (reason & RTC_TAMPID_TAMPID1) { + if (a2_callback != NULL) a2_callback(); + } else if (reason & RTC_TAMPID_TAMPID0) { + if (d1_callback != NULL) d1_callback(); + } +} + +void watch_register_extwake_callback(uint8_t pin, ext_irq_cb_t callback) { + uint32_t pinmux; + if (pin == D1) { + d1_callback = callback; + pinmux = PINMUX_PB00G_RTC_IN0; + } else if (pin == A2) { + a2_callback = callback; + pinmux = PINMUX_PB02G_RTC_IN1; + } else { + return; + } + gpio_set_pin_direction(pin, GPIO_DIRECTION_IN); + gpio_set_pin_function(pin, pinmux); + _extwake_register_callback(&CALENDAR_0.device, extwake_callback); +} + +void watch_store_backup_data(uint32_t data, uint8_t reg) { + if (reg < 8) { + RTC->MODE0.BKUP[reg].reg = data; + } +} + +uint32_t watch_get_backup_data(uint8_t reg) { + if (reg < 8) { + return RTC->MODE0.BKUP[reg].reg; + } + + return 0; +} + +void watch_enter_deep_sleep() { + // enable and configure the external wake interrupt, if not already set up. + if (btn_alarm_callback == NULL && a2_callback == NULL && d1_callback == NULL) { + gpio_set_pin_direction(BTN_ALARM, GPIO_DIRECTION_IN); + gpio_set_pin_pull_mode(BTN_ALARM, GPIO_PULL_DOWN); + gpio_set_pin_function(BTN_ALARM, PINMUX_PA02G_RTC_IN2); + _extwake_register_callback(&CALENDAR_0.device, extwake_callback); + } + + // disable SLCD + slcd_sync_deinit(&SEGMENT_LCD_0); + hri_mclk_clear_APBCMASK_SLCD_bit(SLCD); + + // TODO: disable other peripherals + + // go into backup sleep mode + sleep(5); +} diff --git a/watch-library/watch/watch_deepsleep.h b/watch-library/watch/watch_deepsleep.h new file mode 100644 index 00000000..cea6f1aa --- /dev/null +++ b/watch-library/watch/watch_deepsleep.h @@ -0,0 +1,74 @@ +/* + * MIT License + * + * Copyright (c) 2020 Joey Castillo + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ +////< @file watch_deepsleep.h + +/** @addtogroup deepsleep Deep Sleep Control + * @brief This section covers functions related to preparing for and entering BACKUP mode, the + * deepest sleep mode available on the SAM L22 + */ +/// @{ +/** @brief Registers a callback on one of the RTC's external wake pins, which can wake the device + * from deep sleep mode. + * @param pin Either pin A2 or pin D1, the two external wake pins on the nine-pin connector. + * @param callback The callback to be called if this pin triggers outside of deep sleep mode. + * @note When in normal or STANDBY mode, this will function much like a standard external interrupt + * situation: these pins will wake from standby, and your callback will be called. However, + * if the device enters deep sleep and one of these pins wakes the device, your callback + * WILL NOT be called. + */ +void watch_register_extwake_callback(uint8_t pin, ext_irq_cb_t callback); + +/** @brief Stores data in one of the RTC's backup registers, which retain their data in deep sleep. + * @param data An unsigned 32 bit integer with the data you wish to store. + * @param reg A register from 0-7. + */ +void watch_store_backup_data(uint32_t data, uint8_t reg); + +/** @brief Gets 32 bits of data from the RTC's backup register, which retains its data in deep sleep. + * @param reg A register from 0-7. + * @return An unsigned 32 bit integer with the from the backup register. + */ +uint32_t watch_get_backup_data(uint8_t reg); + +/** @brief Enters the SAM L22's lowest-power mode, BACKUP. + * @details This function does some housekeeping before entering BACKUP mode. It first disables all + * peripherals except for the RTC, and disables the tick interrupt (since that would wake) + * us up from deep sleep. It also sets an external wake source on the ALARM button, if one + * was not already set. If you wish to wake from another source, such as one of the external + * wake interrupt pins on the 9-pin connector, set that up prior to calling this function. + * @note If you have a callback set for an external wake interrupt, it will be called if triggered while + * in ACTIVE, IDLE or STANDBY modes, but it *will not be called* when waking from BACKUP. + * Waking from backup is effectively like waking from reset, except that your @ref + * app_wake_from_deep_sleep function will be called. + * @warning In initial testing, it seems like the ALARM_BTN pin (PA02 RTC/IN2) cannot wake the device + * from deep sleep mode. There is an errata note (Reference: 15010, linked) that says that + * due to a silicon bug, PB01 cannot be used as RTC/IN2. It seems though that this bug may + * also affect PA02. As a result — and I'm very bummed about this — you cannot use deep sleep + * mode unless you set up an external wake interrupt using a device on the nine-pin connector + * (i.e. an accelerometer with an interrupt pin). Otherwise your only option for waking will + * be to unscrew the watch case and press the reset button on the back of the board. + * http://ww1.microchip.com/downloads/en/DeviceDoc/SAM_L22_Family_Errata_DS80000782B.pdf + */ +void watch_enter_deep_sleep(); +/// @} diff --git a/watch-library/watch/watch_extint.c b/watch-library/watch/watch_extint.c new file mode 100644 index 00000000..19f6041a --- /dev/null +++ b/watch-library/watch/watch_extint.c @@ -0,0 +1,39 @@ +/* + * MIT License + * + * Copyright (c) 2020 Joey Castillo + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + + void watch_enable_buttons() { + EXTERNAL_IRQ_0_init(); +} + +void watch_register_button_callback(const uint8_t pin, ext_irq_cb_t callback) { + if (pin == BTN_ALARM) { + gpio_set_pin_direction(BTN_ALARM, GPIO_DIRECTION_IN); + gpio_set_pin_pull_mode(BTN_ALARM, GPIO_PULL_DOWN); + gpio_set_pin_function(BTN_ALARM, PINMUX_PA02G_RTC_IN2); + btn_alarm_callback = callback; + _extwake_register_callback(&CALENDAR_0.device, extwake_callback); + } else { + ext_irq_register(pin, callback); + } +} diff --git a/watch-library/watch/watch_extint.h b/watch-library/watch/watch_extint.h new file mode 100644 index 00000000..71295902 --- /dev/null +++ b/watch-library/watch/watch_extint.h @@ -0,0 +1,52 @@ +/* + * MIT License + * + * Copyright (c) 2020 Joey Castillo + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ +////< @file watch_extint.h + +#include "hal_ext_irq.h" + +/** @addtogroup buttons Buttons + * @brief This section covers functions related to the three buttons: Light, Mode and Alarm. + * @details The buttons are the core input UI of the watch, and the way the user will interact with + * your application. They are active high, pulled down by the microcontroller, and triggered + * when one of the "pushers" brings a tab from the metal frame into contact with the edge + * of the board. Note that the buttons can only wake the watch from STANDBY mode (except maybe for the + * ALARM button; still working on that one). The external interrupt controller runs in + STANDBY mode, but it does not runin BACKUP mode; to wake from BACKUP, buttons will not cut it, + */ +/// @{ +/** @brief Enables the external interrupt controller for use with the buttons. + * @note The BTN_ALARM button runs off of an interrupt in the the RTC controller, not the EIC. If your + * application ONLY makes use of the alarm button, you do not need to call this method; you can + * save ~5µA by leaving the EIC disabled and only registering a callback for BTN_ALARM. + */ +void watch_enable_buttons(); + +/** @brief Configures an external interrupt on one of the button pins. + * @param pin One of pins BTN_LIGHT, BTN_MODE or BTN_ALARM. + * @param callback The function you wish to have called when the button is pressed. + * @note The BTN_ALARM button runs off of an interrupt in the the RTC controller, not the EIC. This + * implementation detail should not make any difference to your app, + */ +void watch_register_button_callback(const uint8_t pin, ext_irq_cb_t callback); +/// @} diff --git a/watch-library/watch/watch_gpio.c b/watch-library/watch/watch_gpio.c new file mode 100644 index 00000000..460a38df --- /dev/null +++ b/watch-library/watch/watch_gpio.c @@ -0,0 +1,53 @@ +/* + * MIT License + * + * Copyright (c) 2020 Joey Castillo + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + + void watch_enable_digital_input(const uint8_t pin) { + gpio_set_pin_direction(pin, GPIO_DIRECTION_IN); + gpio_set_pin_function(pin, GPIO_PIN_FUNCTION_OFF); +} + +void watch_enable_pull_up(const uint8_t pin) { + gpio_set_pin_pull_mode(pin, GPIO_PULL_UP); +} + +void watch_enable_pull_down(const uint8_t pin) { + gpio_set_pin_pull_mode(pin, GPIO_PULL_DOWN); +} + +bool watch_get_pin_level(const uint8_t pin) { + return gpio_get_pin_level(pin); +} + +void watch_enable_digital_output(const uint8_t pin) { + gpio_set_pin_direction(pin, GPIO_DIRECTION_OUT); + gpio_set_pin_function(pin, GPIO_PIN_FUNCTION_OFF); +} + +void watch_disable_digital_output(const uint8_t pin) { + gpio_set_pin_direction(pin, GPIO_DIRECTION_OFF); +} + +void watch_set_pin_level(const uint8_t pin, const bool level) { + gpio_set_pin_level(pin, level); +} diff --git a/watch-library/watch/watch_gpio.h b/watch-library/watch/watch_gpio.h new file mode 100644 index 00000000..f7678f6f --- /dev/null +++ b/watch-library/watch/watch_gpio.h @@ -0,0 +1,66 @@ +/* + * MIT License + * + * Copyright (c) 2020 Joey Castillo + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ +////< @file watch_gpio.h + +/** @addtogroup gpio Digital Input and Output + * @brief This section covers functions related to general-purpose input and output signals. + */ +/// @{ +/** @brief Configures the selected pin for digital input. + * @param pin The pin that you wish to act as an input. + */ +void watch_enable_digital_input(const uint8_t pin); + +/** @brief Enables a pull-up resistor on the selected pin. + * @param pin The pin that you wish to configure. + */ +void watch_enable_pull_up(const uint8_t pin); + +/** @brief Enables a pull-down resistor on the selected pin. + * @param pin The pin that you wish to configure. + */ +void watch_enable_pull_down(const uint8_t pin); + +/** @brief Gets the level of the selected pin. + * @param pin The pin whose value you wish to read. + * @return true if the pin was logic high; otherwise, false. + */ +bool watch_get_pin_level(const uint8_t pin); + +/** @brief Configures the selected pin for digital output. + * @param pin The pin that you wish to act as an output. + */ +void watch_enable_digital_output(const uint8_t pin); + +/** @brief Disables digital output on the selected pin. + * @param pin The pin that you wish disable. + */ +void watch_disable_digital_output(const uint8_t pin); + +/** @brief Sets the level of the selected pin. + * @param pin The pin whose value you wish to set. + * @param level The level you wish to set: true for high, false for low. + */ +void watch_set_pin_level(const uint8_t pin, const bool level); +/// @} diff --git a/watch-library/watch/watch_i2c.c b/watch-library/watch/watch_i2c.c new file mode 100644 index 00000000..bded405b --- /dev/null +++ b/watch-library/watch/watch_i2c.c @@ -0,0 +1,86 @@ +/* + * MIT License + * + * Copyright (c) 2020 Joey Castillo + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + + struct io_descriptor *I2C_0_io; + +void watch_enable_i2c() { + I2C_0_init(); + i2c_m_sync_get_io_descriptor(&I2C_0, &I2C_0_io); + i2c_m_sync_enable(&I2C_0); +} + +void watch_i2c_send(int16_t addr, uint8_t *buf, uint16_t length) { + i2c_m_sync_set_periphaddr(&I2C_0, addr, I2C_M_SEVEN); + io_write(I2C_0_io, buf, length); +} + +void watch_i2c_receive(int16_t addr, uint8_t *buf, uint16_t length) { + i2c_m_sync_set_periphaddr(&I2C_0, addr, I2C_M_SEVEN); + io_read(I2C_0_io, buf, length); +} + +void watch_i2c_write8(int16_t addr, uint8_t reg, uint8_t data) { + uint8_t buf[2]; + buf[0] = reg; + buf[1] = data; + + watch_i2c_send(addr, (uint8_t *)&buf, 2); +} + +uint8_t watch_i2c_read8(int16_t addr, uint8_t reg) { + uint8_t data; + + watch_i2c_send(addr, (uint8_t *)®, 1); + watch_i2c_receive(addr, (uint8_t *)&data, 1); + + return data; +} + +uint16_t watch_i2c_read16(int16_t addr, uint8_t reg) { + uint16_t data; + + watch_i2c_send(addr, (uint8_t *)®, 1); + watch_i2c_receive(addr, (uint8_t *)&data, 2); + + return data; +} + +uint32_t watch_i2c_read24(int16_t addr, uint8_t reg) { + uint32_t data; + data = 0; + + watch_i2c_send(addr, (uint8_t *)®, 1); + watch_i2c_receive(addr, (uint8_t *)&data, 3); + + return data << 8; +} + +uint32_t watch_i2c_read32(int16_t addr, uint8_t reg) { + uint32_t data; + + watch_i2c_send(addr, (uint8_t *)®, 1); + watch_i2c_receive(addr, (uint8_t *)&data, 4); + + return data; +} diff --git a/watch-library/watch/watch_i2c.h b/watch-library/watch/watch_i2c.h new file mode 100644 index 00000000..e944bbab --- /dev/null +++ b/watch-library/watch/watch_i2c.h @@ -0,0 +1,97 @@ +/* + * MIT License + * + * Copyright (c) 2020 Joey Castillo + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ +////< @file watch_i2c.h + +/** @addtogroup i2c I2C Controller Driver + * @brief This section covers functions related to the SAM L22's built-I2C driver, including + * configuring the I2C bus, putting values directly on the bus and reading data from + * registers on I2C devices. + */ +/// @{ +/** @brief Enables the I2C peripheral. Call this before attempting to interface with I2C devices. + */ +void watch_enable_i2c(); + +/** @brief Sends a series of values to a device on the I2C bus. + * @param addr The address of the device you wish to talk to. + * @param buf A series of unsigned bytes; the data you wish to transmit. + * @param length The number of bytes in buf that you wish to send. + */ +void watch_i2c_send(int16_t addr, uint8_t *buf, uint16_t length); + +/** @brief Receives a series of values from a device on the I2C bus. + * @param addr The address of the device you wish to hear from. + * @param buf Storage for the incoming bytes; on return, it will contain the received data. + * @param length The number of bytes that you wish to receive. + */ +void watch_i2c_receive(int16_t addr, uint8_t *buf, uint16_t length); + +/** @brief Writes a byte to a register in an I2C device. + * @param addr The address of the device you wish to address. + * @param reg The register on the device that you wish to set. + * @param data The value that you wish to set the register to. + */ +void watch_i2c_write8(int16_t addr, uint8_t reg, uint8_t data); + +/** @brief Reads a byte from a register in an I2C device. + * @param addr The address of the device you wish to address. + * @param reg The register on the device that you wish to read. + * @return An unsigned byte representing the value of the register that was read. + */ +uint8_t watch_i2c_read8(int16_t addr, uint8_t reg); + +/** @brief Reads an unsigned little-endian word from a register in an I2C device. + * @param addr The address of the device you wish to address. + * @param reg The register on the device that you wish to read. + * @return An unsigned word representing the value of the register that was read. + * @note This reads two bytes into the word in bus order. If the device returns + the LSB first and then the MSB, you can use this value as returned. + If the device returns the data in big-endian order or uses some other + kind of fancy bit packing, you may need to shuffle some bits around. + */ +uint16_t watch_i2c_read16(int16_t addr, uint8_t reg); + +/** @brief Reads three bytes as an unsigned little-endian int from a register in an I2C device. + * @param addr The address of the device you wish to address. + * @param reg The register on the device that you wish to read. + * @return An unsigned word representing the value of the register that was read. + * @note This reads three bytes into the word in bus order. If the device returns + these bytes LSB first, you can use this value as returned. If there is a + sign bit, the device returns the data in big-endian order, or it uses some + other kind of fancy bit packing, you may need to shuffle some bits around. + */ +uint32_t watch_i2c_read24(int16_t addr, uint8_t reg); + + +/** @brief Reads an unsigned little-endian int from a register in an I2C device. + * @param addr The address of the device you wish to address. + * @param reg The register on the device that you wish to read. + * @return An unsigned word representing the value of the register that was read. + * @note This reads three bytes into the word in bus order. If the device returns + these bytes LSB first, you can use this value as returned. If the device + returns the data in big-endian order, or it uses some other kind of fancy + bit packing, you may need to shuffle some bits around. + */ +uint32_t watch_i2c_read32(int16_t addr, uint8_t reg); +/// @} diff --git a/watch-library/watch/watch_led.c b/watch-library/watch/watch_led.c new file mode 100644 index 00000000..01f59fc4 --- /dev/null +++ b/watch-library/watch/watch_led.c @@ -0,0 +1,95 @@ +/* + * MIT License + * + * Copyright (c) 2020 Joey Castillo + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + + bool PWM_0_enabled = false; + +void watch_enable_led(bool pwm) { + if (pwm) { + if (PWM_0_enabled) return; + + PWM_0_init(); + pwm_set_parameters(&PWM_0, 10000, 0); + pwm_enable(&PWM_0); + + PWM_0_enabled = true; + } else { + watch_enable_digital_output(RED); + watch_enable_digital_output(GREEN); + } + watch_set_led_off(); +} + +void watch_disable_led(bool pwm) { + if (pwm) { + if (!PWM_0_enabled) return; + pwm_disable(&PWM_0); + PWM_0_enabled = false; + } + + watch_disable_digital_output(RED); + watch_disable_digital_output(GREEN); +} + +void watch_set_led_color(uint16_t red, uint16_t green) { + if (PWM_0_enabled) { + TC3->COUNT16.CC[0].reg = red; + TC3->COUNT16.CC[1].reg = green; + } +} + +void watch_set_led_red() { + if (PWM_0_enabled) { + watch_set_led_color(65535, 0); + } else { + watch_set_pin_level(RED, true); + watch_set_pin_level(GREEN, false); + } +} + +void watch_set_led_green() { + if (PWM_0_enabled) { + watch_set_led_color(65535, 0); + } else { + watch_set_pin_level(RED, false); + watch_set_pin_level(GREEN, true); + } +} + +void watch_set_led_yellow() { + if (PWM_0_enabled) { + watch_set_led_color(65535, 65535); + } else { + watch_set_pin_level(RED, true); + watch_set_pin_level(GREEN, true); + } +} + +void watch_set_led_off() { + if (PWM_0_enabled) { + watch_set_led_color(0, 0); + } else { + watch_set_pin_level(RED, false); + watch_set_pin_level(GREEN, false); + } +} diff --git a/watch-library/watch/watch_led.h b/watch-library/watch/watch_led.h new file mode 100644 index 00000000..04b6e5fa --- /dev/null +++ b/watch-library/watch/watch_led.h @@ -0,0 +1,74 @@ +/* + * MIT License + * + * Copyright (c) 2020 Joey Castillo + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ +////< @file watch_led.h + +/** @addtogroup led LED Control + * @brief This section covers functions related to the bi-color red/green LED mounted behind the LCD. + * @details The SAM L22 is an exceedingly power efficient chip, whereas the LED's are relatively power- + * hungry. The green LED, at full power, consumes more power than the whole chip in active mode, + * and the red LED consumes about twelve times as much power! The LED's should thus be used only + * sparingly in order to preserve battery life. + * @todo Explore running the TC3 PWM driver in standby mode; this would require that the user disable it + * in app_prepare_for_sleep, but could allow for low power, low duty indicator LED usage. + */ +/// @{ +/** @brief Enables the LED. + * @param pwm if true, enables PWM output for brightness control (required to use @ref watch_set_led_color). + If false, configures the LED pins as digital outputs. + * @note The TC driver required for PWM mode does not run in STANDBY mode. You should keep your app awake + while PWM'ing the LED's, and disable them before going to sleep. + */ +void watch_enable_led(bool pwm); + +/** @brief Disables the LEDs. + * @param pwm if true, disables the PWM output. If false, disables the digital outputs. + */ +void watch_disable_led(bool pwm); + +/** @brief Sets the LED to a custom color by modulating each output's duty cycle. + * @param red The red value. + * @param green The green value. + * @note still working on this, 0-65535 works now but these values may change. + */ +void watch_set_led_color(uint16_t red, uint16_t green); + +/** @brief Sets the red LED to full brightness, and turns the green LED off. + * @note Of the two LED's in the RG bi-color LED, the red LED is the less power-efficient one (~4.5 mA). + */ +void watch_set_led_red(); + +/** @brief Sets the green LED to full brightness, and turns the red LED off. + * @note Of the two LED's in the RG bi-color LED, the green LED is the more power-efficient one (~0.44 mA). + */ +void watch_set_led_green(); + +/** @brief Sets both red and green LEDs to full brightness. + * @note The total current draw between the two LED's in this mode will be ~5 mA, which is more than the + * watch draws in any other mode. Take care not to drain the battery. + */ +void watch_set_led_yellow(); + +/** @brief Turns both the red and the green LEDs off. */ +void watch_set_led_off(); +/// @} diff --git a/watch-library/watch/watch_private.c b/watch-library/watch/watch_private.c new file mode 100644 index 00000000..bfe171f1 --- /dev/null +++ b/watch-library/watch/watch_private.c @@ -0,0 +1,44 @@ +/* + * MIT License + * + * Copyright (c) 2020 Joey Castillo + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +void _watch_init() { + // disable the LED pin (it may have been enabled by the bootloader) + watch_disable_digital_output(RED); + + // Use switching regulator for lower power consumption. + SUPC->VREG.bit.SEL = 1; + while(!SUPC->STATUS.bit.VREGRDY); + + // External wake depends on RTC; calendar is a required module. + CALENDAR_0_init(); + calendar_enable(&CALENDAR_0); + + // Not sure if this belongs in every app -- is there a power impact? + delay_driver_init(); + + // set up state + btn_alarm_callback = NULL; + a2_callback = NULL; + d1_callback = NULL; +} diff --git a/watch-library/watch/watch_private.h b/watch-library/watch/watch_private.h new file mode 100644 index 00000000..99171126 --- /dev/null +++ b/watch-library/watch/watch_private.h @@ -0,0 +1,26 @@ +/* + * MIT License + * + * Copyright (c) 2021 Joey Castillo + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +/// Called by main.c while setting up the app. You should not call this from your app. +void _watch_init(); diff --git a/watch-library/watch/watch_rtc.c b/watch-library/watch/watch_rtc.c new file mode 100644 index 00000000..2d6d598f --- /dev/null +++ b/watch-library/watch/watch_rtc.c @@ -0,0 +1,40 @@ +/* + * MIT License + * + * Copyright (c) 2020 Joey Castillo + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + + bool _watch_rtc_is_enabled() { + return RTC->MODE0.CTRLA.bit.ENABLE; +} + +void watch_set_date_time(struct calendar_date_time date_time) { + calendar_set_date(&CALENDAR_0, &date_time.date); + calendar_set_time(&CALENDAR_0, &date_time.time); +} + +void watch_get_date_time(struct calendar_date_time *date_time) { + calendar_get_date_time(&CALENDAR_0, date_time); +} + +void watch_register_tick_callback(ext_irq_cb_t callback) { + _prescaler_register_callback(&CALENDAR_0.device, callback); +} diff --git a/watch-library/watch/watch_rtc.h b/watch-library/watch/watch_rtc.h new file mode 100644 index 00000000..c685ac26 --- /dev/null +++ b/watch-library/watch/watch_rtc.h @@ -0,0 +1,58 @@ +/* + * MIT License + * + * Copyright (c) 2020 Joey Castillo + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ +////< @file watch_rtc.h + +#include "hpl_calendar.h" + +/** @addtogroup rtc Real-Time Clock + * @brief This section covers functions related to the SAM L22's real-time clock peripheral, including + * date, time and alarm functions. + * @details The real-time clock is the only peripheral that main.c enables for you. It is the cornerstone + * of low power operation on the watch, and it is required for several key functions that we + * assume will be available, namely the wake from BACKUP mode and the callback on the ALARM button. + * It is also required for the operation of the 1 Hz tick interrupt, which you will most likely use + * to wake from STANDBY mode. + */ +/// @{ +/** @brief Called by main.c to check if the RTC is enabled. + * You may call this function, but outside of app_init, it sbould always return true. + */ +bool _watch_rtc_is_enabled(); + +/** @brief Sets the system date and time. + * @param date_time A struct representing the date and time you wish to set. + */ +void watch_set_date_time(struct calendar_date_time date_time); + +/** @brief Returns the system date and time in the provided struct. + * @param date_time A pointer to a calendar_date_time struct. + It will be populated with the correct date and time on return. + */ +void watch_get_date_time(struct calendar_date_time *date_time); + +/** @brief Registers a "tick" callback that will be called once per second. + * @param callback The function you wish to have called when the clock ticks. + */ +void watch_register_tick_callback(ext_irq_cb_t callback); +/// @} diff --git a/watch-library/watch/watch_slcd.c b/watch-library/watch/watch_slcd.c new file mode 100644 index 00000000..cdade07f --- /dev/null +++ b/watch-library/watch/watch_slcd.c @@ -0,0 +1,217 @@ +/* + * MIT License + * + * Copyright (c) 2020 Joey Castillo + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + + ////////////////////////////////////////////////////////////////////////////////////////// +// Segmented Display + +static const uint8_t Character_Set[] = +{ + 0b00000000, // + 0b00000000, // ! (unused) + 0b00100010, // " + 0b01100011, // # (degree symbol, hash mark doesn't fit) + 0b00000000, // $ (unused) + 0b00000000, // % (unused) + 0b01000100, // & ("lowercase 7" for positions 4 and 6) + 0b00100000, // ' + 0b00111001, // ( + 0b00001111, // ) + 0b00000000, // * (unused) + 0b11000000, // + (only works in position 0) + 0b00000100, // , + 0b01000000, // - + 0b01000000, // . (same as -, semantically most useful) + 0b00010010, // / + 0b00111111, // 0 + 0b00000110, // 1 + 0b01011011, // 2 + 0b01001111, // 3 + 0b01100110, // 4 + 0b01101101, // 5 + 0b01111101, // 6 + 0b00000111, // 7 + 0b01111111, // 8 + 0b01101111, // 9 + 0b00000000, // : (unused) + 0b00000000, // ; (unused) + 0b01011000, // < + 0b01001000, // = + 0b01001100, // > + 0b01010011, // ? + 0b11111111, // @ (all segments on) + 0b01110111, // A + 0b01111111, // B + 0b00111001, // C + 0b00111111, // D + 0b01111001, // E + 0b01110001, // F + 0b00111101, // G + 0b01110110, // H + 0b10001001, // I (only works in position 0) + 0b00001110, // J + 0b01110101, // K + 0b00111000, // L + 0b10110111, // M (only works in position 0) + 0b00110111, // N + 0b00111111, // O + 0b01110011, // P + 0b01100111, // Q + 0b11110111, // R (only works in position 1) + 0b01101101, // S + 0b10000001, // T (only works in position 0; set (1, 12) to make it work in position 1) + 0b00111110, // U + 0b00111110, // V + 0b10111110, // W (only works in position 0) + 0b01111110, // X + 0b01101110, // Y + 0b00011011, // Z + 0b00111001, // [ + 0b00100100, // backslash + 0b00001111, // ] + 0b00100011, // ^ + 0b00001000, // _ + 0b00000010, // ` + 0b01011111, // a + 0b01111100, // b + 0b01011000, // c + 0b01011110, // d + 0b01111011, // e + 0b01110001, // f + 0b01101111, // g + 0b01110100, // h + 0b00010000, // i + 0b01000010, // j (appears as superscript to work in more positions) + 0b01110101, // k + 0b00110000, // l + 0b10110111, // m (only works in position 0) + 0b01010100, // n + 0b01011100, // o + 0b01110011, // p + 0b01100111, // q + 0b01010000, // r + 0b01101101, // s + 0b01111000, // t + 0b01100010, // u (appears as superscript to work in more positions) + 0b01100010, // v (appears as superscript to work in more positions) + 0b10111110, // w (only works in position 0) + 0b01111110, // x + 0b01101110, // y + 0b00011011, // z + 0b00111001, // { + 0b00110000, // | + 0b00001111, // } + 0b00000001, // ~ +}; + +static const uint64_t Segment_Map[] = { + 0x4e4f0e8e8f8d4d0d, // Position 0, mode + 0xc8c4c4c8b4b4b0b, // Position 1, mode (Segments B and C shared, as are segments E and F) + 0xc049c00a49890949, // Position 2, day of month (Segments A, D, G shared; missing segment F) + 0xc048088886874707, // Position 3, day of month + 0xc053921252139352, // Position 4, clock hours (Segments A and D shared) + 0xc054511415559594, // Position 5, clock hours + 0xc057965616179716, // Position 6, clock minutes (Segments A and D shared) + 0xc041804000018a81, // Position 7, clock minutes + 0xc043420203048382, // Position 8, clock seconds + 0xc045440506468584, // Position 9, clock seconds +}; + +static const uint8_t Num_Chars = 10; + +static const uint32_t IndicatorSegments[6] = { + SLCD_SEGID(0, 17), // WATCH_INDICATOR_SIGNAL + SLCD_SEGID(0, 16), // WATCH_INDICATOR_BELL + SLCD_SEGID(2, 17), // WATCH_INDICATOR_PM + SLCD_SEGID(2, 16), // WATCH_INDICATOR_24H + SLCD_SEGID(1, 10), // WATCH_INDICATOR_LAP +}; + +void watch_enable_display() { + SEGMENT_LCD_0_init(); + slcd_sync_enable(&SEGMENT_LCD_0); +} + +inline void watch_set_pixel(uint8_t com, uint8_t seg) { + slcd_sync_seg_on(&SEGMENT_LCD_0, SLCD_SEGID(com, seg)); +} + +inline void watch_clear_pixel(uint8_t com, uint8_t seg) { + slcd_sync_seg_off(&SEGMENT_LCD_0, SLCD_SEGID(com, seg)); +} + +void watch_display_character(uint8_t character, uint8_t position) { + // handle lowercase 7 if needed + if (character == '7' && (position == 4 || position == 6)) character = '&'; + + uint64_t segmap = Segment_Map[position]; + uint64_t segdata = Character_Set[character - 0x20]; + + for (int i = 0; i < 8; i++) { + uint8_t com = (segmap & 0xFF) >> 6; + if (com > 2) { + // COM3 means no segment exists; skip it. + segmap = segmap >> 8; + segdata = segdata >> 1; + continue; + } + uint8_t seg = segmap & 0x3F; + slcd_sync_seg_off(&SEGMENT_LCD_0, SLCD_SEGID(com, seg)); + if (segdata & 1) slcd_sync_seg_on(&SEGMENT_LCD_0, SLCD_SEGID(com, seg)); + segmap = segmap >> 8; + segdata = segdata >> 1; + } +} + +void watch_display_string(char *string, uint8_t position) { + size_t i = 0; + while(string[i] != 0) { + watch_display_character(string[i], position + i); + i++; + if (i >= Num_Chars) break; + } +} + +inline void watch_set_colon() { + slcd_sync_seg_on(&SEGMENT_LCD_0, SLCD_SEGID(1, 16)); +} + +inline void watch_clear_colon() { + slcd_sync_seg_off(&SEGMENT_LCD_0, SLCD_SEGID(1, 16)); +} + +inline void watch_set_indicator(WatchIndicatorSegment indicator) { + slcd_sync_seg_on(&SEGMENT_LCD_0, IndicatorSegments[indicator]); +} + +inline void watch_clear_indicator(WatchIndicatorSegment indicator) { + slcd_sync_seg_off(&SEGMENT_LCD_0, IndicatorSegments[indicator]); +} + +void watch_clear_all_indicators() { + slcd_sync_seg_off(&SEGMENT_LCD_0, SLCD_SEGID(2, 17)); + slcd_sync_seg_off(&SEGMENT_LCD_0, SLCD_SEGID(2, 16)); + slcd_sync_seg_off(&SEGMENT_LCD_0, SLCD_SEGID(0, 17)); + slcd_sync_seg_off(&SEGMENT_LCD_0, SLCD_SEGID(0, 16)); + slcd_sync_seg_off(&SEGMENT_LCD_0, SLCD_SEGID(1, 10)); +} diff --git a/watch-library/watch/watch_slcd.h b/watch-library/watch/watch_slcd.h new file mode 100644 index 00000000..efef99ac --- /dev/null +++ b/watch-library/watch/watch_slcd.h @@ -0,0 +1,102 @@ +/* + * MIT License + * + * Copyright (c) 2020 Joey Castillo + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ +////< @file watch_slcd.h + +/** @addtogroup slcd Segment LCD Display + * @brief This section covers functions related to the Segment LCD display driver, which is responsible + * for displaying strings of characters and indicators on the main watch display. + * @details The segment LCD controller consumes about 3 microamperes of power with no segments on, and + * about 4 microamperes with all segments on. There is also a slight power impact associated + * with updating the screen (about 1 microampere to update at 1 Hz). For the absolute lowest + * power operation, update the display only when its contents have changed, and disable the + * SLCD peripheral when the screen is not in use. + * For a map of all common and segment pins, see <a href="segmap.html">segmap.html</a>. You can + * hover over any segment in that diagram to view the common and segment pins associated with + * each segment of the display. + */ +/// @{ + +/// An enum listing the icons and indicators available on the watch. +typedef enum WatchIndicatorSegment { + WATCH_INDICATOR_SIGNAL = 0, ///< The hourly signal indicator; also useful for indicating that sensors are on. + WATCH_INDICATOR_BELL, ///< The small bell indicating that an alarm is set. + WATCH_INDICATOR_PM, ///< The PM indicator, indicating that a time is in the afternoon. + WATCH_INDICATOR_24H, ///< The 24H indicator, indicating that the watch is in a 24-hour mode. + WATCH_INDICATOR_LAP ///< The LAP indicator; the F-91W uses this in its stopwatch UI. +} WatchIndicatorSegment; + +/** @brief Enables the Segment LCD display. + * Call this before attempting to set pixels or display strings. + */ +void watch_enable_display(); + +/** @brief Sets a pixel. Use this to manually set a pixel with a given common and segment number. + * See <a href="segmap.html">segmap.html</a>. + * @param com the common pin, numbered from 0-2. + * @param seg the segment pin, numbered from 0-23. + */ +void watch_set_pixel(uint8_t com, uint8_t seg); + +/** @brief Clears a pixel. Use this to manually clear a pixel with a given common and segment number. + * See <a href="segmap.html">segmap.html</a>. + * @param com the common pin, numbered from 0-2. + * @param seg the segment pin, numbered from 0-23. + */ +void watch_clear_pixel(uint8_t com, uint8_t seg); + +/** @brief Displays a string at the given position, starting from the top left. There are ten digits. + A space in any position will clear that digit. + * @param string A null-terminated string. + * @param position The position where you wish to start displaying the string. The day of week digits + * are positions 0 and 1; the day of month digits are positions 2 and 3, and the main + * clock line occupies positions 4-9. + * @note This method does not clear the display; if for example you display a two-character string at + position 0, positions 2-9 will retain whatever state they were previously displaying. + */ +void watch_display_string(char *string, uint8_t position); + +/** @brief Turns the colon segment on. + */ +void watch_set_colon(); + +/** @brief Turns the colon segment off. + */ +void watch_clear_colon(); + +/** @brief Sets an indicator on the LCD. Use this to turn on one of the indicator segments. + * @param indicator One of the indicator segments from the enum. @see WatchIndicatorSegment + */ +void watch_set_indicator(WatchIndicatorSegment indicator); + +/** @brief Clears an indicator on the LCD. Use this to turn off one of the indicator segments. + * @param indicator One of the indicator segments from the enum. @see WatchIndicatorSegment + */ +void watch_clear_indicator(WatchIndicatorSegment indicator); + +/** @brief Clears all indicator segments. + * @see WatchIndicatorSegment + */ +void watch_clear_all_indicators(); + +/// @} diff --git a/watch-library/watch/watch_uart.c b/watch-library/watch/watch_uart.c new file mode 100644 index 00000000..4cbac89b --- /dev/null +++ b/watch-library/watch/watch_uart.c @@ -0,0 +1,85 @@ +/* + * MIT License + * + * Copyright (c) 2020 Joey Castillo + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + + /* + * UART methods are Copyright (c) 2014-2017, Alex Taradov <alex@taradov.com> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include "peripheral_clk_config.h" + +void watch_enable_debug_uart(uint32_t baud) { + uint64_t br = (uint64_t)65536 * (CONF_CPU_FREQUENCY - 16 * baud) / CONF_CPU_FREQUENCY; + + gpio_set_pin_direction(D1, GPIO_DIRECTION_IN); + gpio_set_pin_function(D1, PINMUX_PB00C_SERCOM3_PAD2); + + MCLK->APBCMASK.reg |= MCLK_APBCMASK_SERCOM3; + + GCLK->PCHCTRL[SERCOM3_GCLK_ID_CORE].reg = GCLK_PCHCTRL_GEN(0) | GCLK_PCHCTRL_CHEN; + while (0 == (GCLK->PCHCTRL[SERCOM3_GCLK_ID_CORE].reg & GCLK_PCHCTRL_CHEN)); + + SERCOM3->USART.CTRLA.reg = + SERCOM_USART_CTRLA_DORD | SERCOM_USART_CTRLA_MODE(1/*USART_INT_CLK*/) | + SERCOM_USART_CTRLA_RXPO(0/*PAD0*/) | SERCOM_USART_CTRLA_TXPO(1/*PAD2*/); + + SERCOM3->USART.CTRLB.reg = SERCOM_USART_CTRLB_RXEN | SERCOM_USART_CTRLB_TXEN | + SERCOM_USART_CTRLB_CHSIZE(0/*8 bits*/); + + SERCOM3->USART.BAUD.reg = (uint16_t)br; + + SERCOM3->USART.CTRLA.reg |= SERCOM_USART_CTRLA_ENABLE; +} + +void watch_debug_putc(char c) { + while (!(SERCOM3->USART.INTFLAG.reg & SERCOM_USART_INTFLAG_DRE)); + SERCOM3->USART.DATA.reg = c; +} + +void watch_debug_puts(char *s) { + while (*s) watch_debug_putc(*s++); +} diff --git a/watch-library/watch/watch_uart.h b/watch-library/watch/watch_uart.h new file mode 100644 index 00000000..a26d60d2 --- /dev/null +++ b/watch-library/watch/watch_uart.h @@ -0,0 +1,46 @@ +/* + * MIT License + * + * Copyright (c) 2020 Joey Castillo + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ +////< @file watch_uart.h + +/** @addtogroup debug Debug UART + * @brief This section covers functions related to the debug UART, available on + * pin D1 of the 9-pin connector. + * @todo Refactor this as a USB CDC so that folks can debug over USB. + */ +/// @{ +/** @brief Initializes the debug UART. + * @param baud The baud rate + */ +void watch_enable_debug_uart(uint32_t baud); + +/** @brief Outputs a single character on the debug UART. + * @param c The character you wish to output. + */ +void watch_debug_putc(char c); + +/** @brief Outputs a string on the debug UART. + * @param s A null-terminated string. + */ +void watch_debug_puts(char *s); +/// @} |