From b8de35658ffd78ad8b22f91ccbbd3d63663afda9 Mon Sep 17 00:00:00 2001 From: Alexsander Akers Date: Tue, 25 Jan 2022 15:03:22 -0500 Subject: Sensor Watch Simulator (#35) * Put something on screen * Use the 32bit watch_date_time repr to pass from JS * Implement periodic callbacks * Clear display on enabling * Hook up watch_set_led_color() to SVG (green-only) * Make debug output full-width * Remove default Emscripten canvas * Implement sleep and button clicks * Fix time zone conversion bug in beats-time app * Clean up warnings * Fix pin levels * Set time zone to browser value (if available) * Add basic backup data saving * Silence format specifier warnings in both targets * Remove unnecessary, copied files * Use RTC pointer to clear callbacks (if available) * Use preprocessor define to avoid hardcoding MOVEMENT_NUM_FACES * Change each face to const preprocessor definition * Remove Intl.DateTimeFormat usage * Update shell.html title, header * Add touch start/end event handlers on SVG buttons * Update shell.html * Update folder structure (shared, simulator, hardware under watch-library) * Tease out shared components from watch_slcd * Clean up simulator watch_slcd.c inline JS calls * Fix missing newlines at end of file * Add simulator warnings (except format, unused-paremter) * Implement remaining watch_rtc functions * Fix button bug on mouse down then drag out * Implement remaining watch_slcd functions * Link keyboard events to buttons (for keys A, L, M) * Rewrite event handling (mouse, touch, keyboard) in C * Set explicit text UTF-8 charset in shell.html * Address PR comments * Remove unused directories from include paths --- watch-library/hardware/watch/watch_rtc.c | 195 +++++++++++++++++++++++++++++++ 1 file changed, 195 insertions(+) create mode 100644 watch-library/hardware/watch/watch_rtc.c (limited to 'watch-library/hardware/watch/watch_rtc.c') diff --git a/watch-library/hardware/watch/watch_rtc.c b/watch-library/hardware/watch/watch_rtc.c new file mode 100644 index 00000000..14a968c4 --- /dev/null +++ b/watch-library/hardware/watch/watch_rtc.c @@ -0,0 +1,195 @@ +/* + * 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. + */ + +#include "watch_rtc.h" + +ext_irq_cb_t tick_callbacks[8]; +ext_irq_cb_t alarm_callback; +ext_irq_cb_t btn_alarm_callback; +ext_irq_cb_t a2_callback; +ext_irq_cb_t a4_callback; + +bool _watch_rtc_is_enabled(void) { + return RTC->MODE2.CTRLA.bit.ENABLE; +} + +static void _sync_rtc(void) { + while (RTC->MODE2.SYNCBUSY.reg); +} + +void _watch_rtc_init(void) { + MCLK->APBAMASK.reg |= MCLK_APBAMASK_RTC; + + if (_watch_rtc_is_enabled()) return; // don't reset the RTC if it's already set up. + + RTC->MODE2.CTRLA.bit.ENABLE = 0; + _sync_rtc(); + + RTC->MODE2.CTRLA.bit.SWRST = 1; + _sync_rtc(); + + RTC->MODE2.CTRLA.bit.MODE = RTC_MODE2_CTRLA_MODE_CLOCK_Val; + RTC->MODE2.CTRLA.bit.PRESCALER = RTC_MODE2_CTRLA_PRESCALER_DIV1024_Val; + RTC->MODE2.CTRLA.bit.CLOCKSYNC = 1; + RTC->MODE2.CTRLA.bit.ENABLE = 1; + _sync_rtc(); +} + +void watch_rtc_set_date_time(watch_date_time date_time) { + RTC->MODE2.CLOCK.reg = date_time.reg; + _sync_rtc(); +} + +watch_date_time watch_rtc_get_date_time(void) { + watch_date_time retval; + + _sync_rtc(); + retval.reg = RTC->MODE2.CLOCK.reg; + + return retval; +} + +void watch_rtc_register_tick_callback(ext_irq_cb_t callback) { + watch_rtc_register_periodic_callback(callback, 1); +} + +void watch_rtc_disable_tick_callback(void) { + watch_rtc_disable_periodic_callback(1); +} + +void watch_rtc_register_periodic_callback(ext_irq_cb_t callback, uint8_t frequency) { + // we told them, it has to be a power of 2. + if (__builtin_popcount(frequency) != 1) return; + + // this left-justifies the period in a 32-bit integer. + uint32_t tmp = frequency << 24; + // now we can count the leading zeroes to get the value we need. + // 0x01 (1 Hz) will have 7 leading zeros for PER7. 0xF0 (128 Hz) will have no leading zeroes for PER0. + uint8_t per_n = __builtin_clz(tmp); + + // this also maps nicely to an index for our list of tick callbacks. + tick_callbacks[per_n] = callback; + + NVIC_ClearPendingIRQ(RTC_IRQn); + NVIC_EnableIRQ(RTC_IRQn); + RTC->MODE2.INTENSET.reg = 1 << per_n; +} + +void watch_rtc_disable_periodic_callback(uint8_t frequency) { + if (__builtin_popcount(frequency) != 1) return; + uint8_t per_n = __builtin_clz(frequency << 24); + RTC->MODE2.INTENCLR.reg = 1 << per_n; +} + +void watch_rtc_disable_all_periodic_callbacks(void) { + RTC->MODE2.INTENCLR.reg = 0xFF; +} + +void watch_rtc_register_alarm_callback(ext_irq_cb_t callback, watch_date_time alarm_time, watch_rtc_alarm_match mask) { + RTC->MODE2.Mode2Alarm[0].ALARM.reg = alarm_time.reg; + RTC->MODE2.Mode2Alarm[0].MASK.reg = mask; + RTC->MODE2.INTENSET.reg = RTC_MODE2_INTENSET_ALARM0; + alarm_callback = callback; + NVIC_ClearPendingIRQ(RTC_IRQn); + NVIC_EnableIRQ(RTC_IRQn); + RTC->MODE2.INTENSET.reg = RTC_MODE2_INTENSET_ALARM0; +} + +void watch_rtc_disable_alarm_callback(void) { + RTC->MODE2.INTENCLR.reg = RTC_MODE2_INTENCLR_ALARM0; +} + +void RTC_Handler(void) { + uint16_t interrupt_status = RTC->MODE2.INTFLAG.reg; + uint16_t interrupt_enabled = RTC->MODE2.INTENSET.reg; + + if ((interrupt_status & interrupt_enabled) & RTC_MODE2_INTFLAG_PER_Msk) { + // handle the tick callback first, it's what we do the most. + // start from PER7, the 1 Hz tick. + for(int8_t i = 7; i >= 0; i--) { + if ((interrupt_status & interrupt_enabled) & (1 << i)) { + if (tick_callbacks[i] != NULL) { + tick_callbacks[i](); + } + RTC->MODE2.INTFLAG.reg = 1 << i; + break; + } + } + } else if ((interrupt_status & interrupt_enabled) & RTC_MODE2_INTFLAG_TAMPER) { + // handle the extwake interrupts next. + uint8_t reason = RTC->MODE2.TAMPID.reg; + 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 (a4_callback != NULL) a4_callback(); + } + RTC->MODE2.TAMPID.reg = reason; + RTC->MODE2.INTFLAG.reg = RTC_MODE2_INTFLAG_TAMPER; + } else if ((interrupt_status & interrupt_enabled) & RTC_MODE2_INTFLAG_ALARM0) { + // finally handle the alarm. + if (alarm_callback != NULL) { + alarm_callback(); + } + RTC->MODE2.INTFLAG.reg = RTC_MODE2_INTFLAG_ALARM0; + } +} + +/////////////////////// +// Deprecated functions + +void watch_set_date_time(struct calendar_date_time date_time) { + RTC_MODE2_CLOCK_Type val; + + val.bit.SECOND = date_time.time.sec; + val.bit.MINUTE = date_time.time.min; + val.bit.HOUR = date_time.time.hour; + val.bit.DAY = date_time.date.day; + val.bit.MONTH = date_time.date.month; + val.bit.YEAR = (uint8_t)(date_time.date.year - WATCH_RTC_REFERENCE_YEAR); + + RTC->MODE2.CLOCK.reg = val.reg; + + _sync_rtc(); +} + +void watch_get_date_time(struct calendar_date_time *date_time) { + _sync_rtc(); + RTC_MODE2_CLOCK_Type val = RTC->MODE2.CLOCK; + + date_time->time.sec = val.bit.SECOND; + date_time->time.min = val.bit.MINUTE; + date_time->time.hour = val.bit.HOUR; + date_time->date.day = val.bit.DAY; + date_time->date.month = val.bit.MONTH; + date_time->date.year = val.bit.YEAR + WATCH_RTC_REFERENCE_YEAR; +} + +void watch_register_tick_callback(ext_irq_cb_t callback) { + tick_callbacks[7] = callback; + NVIC_ClearPendingIRQ(RTC_IRQn); + NVIC_EnableIRQ(RTC_IRQn); + RTC->MODE2.INTENSET.reg = RTC_MODE2_INTENSET_PER7; +} -- cgit v1.2.3