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#include "watch.h"
#include <stdlib.h>
//////////////////////////////////////////////////////////////////////////////////////////
// Initialization
void watch_init() {
// 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();
}
//////////////////////////////////////////////////////////////////////////////////////////
// Segmented Display
static const uint8_t Character_Set[] =
{
0b00000000, //
0b00000000, // !
0b00100010, // "
0b01100011, // # (degree symbol, hash mark doesn't fit)
0b00000000, // $
0b00000000, // %
0b01000100, // &
0b00100000, // '
0b00000000, // (
0b00000000, // )
0b00000000, // *
0b11000000, // +
0b00000100, // ,
0b01000000, // -
0b01000000, // .
0b00010010, // /
0b00111111, // 0
0b00000110, // 1
0b01011011, // 2
0b01001111, // 3
0b01100110, // 4
0b01101101, // 5
0b01111101, // 6
0b00000111, // 7
0b01111111, // 8
0b01101111, // 9
0b00000000, // :
0b00000000, // ;
0b01011000, // <
0b01001000, // =
0b01001100, // >
0b01010011, // ?
0b11111111, // @
0b01110111, // A
0b01111111, // B
0b00111001, // C
0b00111111, // D
0b01111001, // E
0b01110001, // F
0b00111101, // G
0b01110110, // H
0b10001001, // I
0b00001110, // J
0b11101010, // K
0b00111000, // L
0b10110111, // M
0b00110111, // N
0b00111111, // O
0b01110011, // P
0b01100111, // Q
0b11110111, // R
0b01101101, // S
0b10000001, // T
0b00111110, // U
0b00111110, // V
0b10111110, // W
0b01111110, // X
0b01101110, // Y
0b00011011, // Z
0b00111001, // [
0b00100100, // backslash
0b00001111, // ]
0b00100110, // ^
0b00001000, // _
0b00000010, // `
0b01011111, // a
0b01111100, // b
0b01011000, // c
0b01011110, // d
0b01111011, // e
0b01110001, // f
0b01101111, // g
0b01110100, // h
0b00010000, // i
0b01000010, // j
0b11101010, // k
0b00110000, // l
0b10110111, // m
0b01010100, // n
0b01011100, // o
0b01110011, // p
0b01100111, // q
0b01010000, // r
0b01101101, // s
0b01111000, // t
0b01100010, // u
0b01100010, // v
0b10111110, // w
0b01111110, // x
0b01101110, // y
0b00011011, // z
0b00111001, // {
0b00110000, // |
0b00001111, // }
0b00000001, // ~
};
static const uint64_t Segment_Map[] = {
0x4e4f0e8e8f8d4d0d, // Position 8
0xc8c4c4c8b4b4b0b, // Position 9
0xc049c00a49890949, // Position 6
0xc048088886874707, // Position 7
0xc053921252139352, // Position 0
0xc054511415559594, // Position 1
0xc057965616179716, // Position 2
0xc041804000018a81, // Position 3
0xc043420203048382, // Position 4
0xc045440506468584, // Position 5
};
static const uint8_t Num_Chars = 10;
void watch_enable_display() {
SEGMENT_LCD_0_init();
slcd_sync_enable(&SEGMENT_LCD_0);
}
void watch_set_pixel(uint8_t com, uint8_t seg) {
slcd_sync_seg_on(&SEGMENT_LCD_0, SLCD_SEGID(com, seg));
}
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) {
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;
}
}
//////////////////////////////////////////////////////////////////////////////////////////
// Buttons
void watch_enable_buttons() {
EXTERNAL_IRQ_0_init();
}
void watch_register_button_callback(const uint32_t pin, ext_irq_cb_t callback) {
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);
}
}
//////////////////////////////////////////////////////////////////////////////////////////
// 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);
}
static ext_irq_cb_t tick_user_callback;
static void tick_callback(struct calendar_dev *const dev) {
tick_user_callback();
}
void watch_register_tick_callback(ext_irq_cb_t callback) {
tick_user_callback = callback;
_prescaler_register_callback(&CALENDAR_0.device, &tick_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;
}
//////////////////////////////////////////////////////////////////////////////////////////
// Deep Sleep
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;
}
static void extwake_callback(struct calendar_dev *const dev) {
// this will never get called since we are basically waking from reset
}
void watch_enter_deep_sleep() {
// enable and configure the external wake interrupt
_extwake_register_callback(&CALENDAR_0.device, &extwake_callback);
_tamper_enable_debounce_asynchronous(&CALENDAR_0.device);
// disable SLCD
slcd_sync_deinit(&SEGMENT_LCD_0);
hri_mclk_clear_APBCMASK_SLCD_bit(SLCD);
// TODO: disable other peripherals
// disable EIC interrupt on ALARM pin (if any) and enable RTC interrupt.
ext_irq_disable(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);
// go into backup sleep mode
sleep(5);
}
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