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clapperboard
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add stand by and wake up functionnality

This commit is contained in:
King Kévin 2017-04-02 16:14:55 +02:00
parent 5b2703bda2
commit 813e9366ad
1 changed files with 27 additions and 1 deletions
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28
main.c
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@ -58,6 +58,9 @@ volatile bool frame_flag = false; /**< flag set when a frame has passed */
#define SQUARE_WAVE_PIN 0 /**< pin connected to RTC DS1307 square wave output */
volatile uint8_t rtc_seconds = 0; /**< number of seconds passed incremented by the square wave */
#define STANDBY_TIMEOUT 30 /**< number of seconds after last shake before going down */
volatile uint16_t standby_timer = 0; /**< number of seconds since last wake-up/activity */
#define FRAME_TIMER 1 /**< timer to count frame time */
#define FRAME_RATE 25 /**< frame rate */
volatile uint8_t frame_count = 0; /**< number of frames passed */
@ -209,12 +212,20 @@ void main(void)
}
#endif
// enable wake up
rcc_periph_clock_enable(RCC_PWR); // enable power domain clock
if (pwr_get_wakeup_flag()) {
printf("woke up from standby\n");
}
pwr_enable_wakeup_pin();
// disable internal RTC
printf("disable internal RTC: ");
rcc_periph_clock_enable(RCC_PWR); // enable power domain clock
rcc_periph_clock_enable(RCC_BKP); // enable backup domain clock
pwr_disable_backup_domain_write_protect(); // enable write on backup domain (including RTC)
RCC_BDCR &= ~RCC_BDCR_RTCEN; // disable RTC
pwr_enable_backup_domain_write_protect(); // re-enable write protect
printf("OK\n");
// setup external RTC
@ -357,6 +368,14 @@ void main(void)
action = true; // action has been performed
led_toggle(); // toggle LED (good to indicate if main function is stuck)
frame_count = 0; // resync frame counter to second
if (standby_timer>=STANDBY_TIMEOUT) { // standby timeout complete
// go into standby mode
printf("standing by\n");
led_max7219_off(0xff); // switch displays off
pwr_clear_wakeup_flag(); // clear flag
SCB_SCR |= SCB_SCR_SLEEPDEEP; // enable deep sleep
pwr_set_standby_mode(); // go to deep sleep
}
if (rtc_seconds>=60) { // one minute passed
rtc_ds1307_time = rtc_ds1307_read_time(); // get time/date from external RTC
if (rtc_ds1307_time==NULL) {
@ -370,10 +389,14 @@ void main(void)
}
}
}
while (pwr_get_wakeup_flag()) { // someone is moving the clapperboard
pwr_clear_wakeup_flag(); // clear flag
standby_timer = 0; // restart standby timer
}
if (action) { // go to sleep if nothing had to be done, else recheck for activity
action = false;
} else {
__WFI(); // go to sleep
__WFI(); // go to sleep and wait for interrupt
}
} // main loop
}
@ -383,6 +406,9 @@ void EXTI_ISR(SQUARE_WAVE_PIN)(void)
{
exti_reset_request(EXTI(SQUARE_WAVE_PIN)); // reset interrupt
rtc_seconds++; // increment number of seconds passed
if (standby_timer<STANDBY_TIMEOUT) { // timeout countdown not complete
standby_timer++; // continue counting down
}
rtc_tick_flag = true; // let main know a second passed
}