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clapperboard
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add keep-alive detection

This commit is contained in:
King Kévin 2017-05-04 12:53:20 +02:00
parent ecdcf07811
commit 017495692c
1 changed files with 24 additions and 8 deletions
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32
main.c
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@ -52,6 +52,7 @@
*/
volatile bool rtc_tick_flag = false; /**< flag set when RTC ticked */
volatile bool frame_flag = false; /**< flag set when a frame has passed */
volatile bool keep_alive_flag = false; /**< flag to restart shutdown counter on power switch activity */
/** @} */
#define SQUARE_WAVE_PORT B /**< port connected to RTC DS1307 square wave output */
@ -74,8 +75,10 @@ volatile uint8_t frame_count = 0; /**< number of frames passed */
#define MUX_S2_PORT B /**< port to select multiplexer output */
#define MUX_S2_PIN 5 /**< pin to select multiplexer output */
#define POWER_PORT B /**< port to control power of all devices (including this micro-controller) */
#define POWER_PIN 8 /**< pin to control power of all devices (including this micro-controller) */
#define POWER_SWITCH_PORT B /**< port to switch power of all devices (including this micro-controller) */
#define POWER_SWITCH_PIN 8 /**< pin to switch power of all devices (including this micro-controller) */
#define POWER_BUTTON_PORT B /**< port to detect power switching activity (to keep alive) */
#define POWER_BUTTON_PIN 1 /**< pin to detect power switching activity (to keep alive) */
/** user input command */
static char command[32] = {0};
@ -247,9 +250,16 @@ void main(void)
rcc_clock_setup_in_hse_8mhz_out_72mhz(); // use 8 MHz high speed external clock to generate 72 MHz internal clock
// keep power on a soon as possible
rcc_periph_clock_enable(RCC_GPIO(POWER_PORT)); // enable clock for GPIO
gpio_set_mode(GPIO(POWER_PORT), GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO(POWER_PIN)); // set as output to control power
gpio_set(GPIO(POWER_PORT), GPIO(POWER_PIN)); // enable power by saturating nMOS controlling power
rcc_periph_clock_enable(RCC_GPIO(POWER_SWITCH_PORT)); // enable clock for GPIO
gpio_set_mode(GPIO(POWER_SWITCH_PORT), GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO(POWER_SWITCH_PIN)); // set as output to control power
gpio_set(GPIO(POWER_SWITCH_PORT), GPIO(POWER_SWITCH_PIN)); // enable power by saturating nMOS controlling power
rcc_periph_clock_enable(RCC_GPIO(POWER_BUTTON_PORT)); // enable clock for GPIO domain
gpio_set_mode(GPIO(POWER_BUTTON_PORT), GPIO_MODE_INPUT, GPIO_CNF_INPUT_FLOAT, GPIO(POWER_BUTTON_PIN)); // set pin as input to detect power switching activity
rcc_periph_clock_enable(RCC_AFIO); // enable alternate function clock for external interrupt
exti_select_source(EXTI(POWER_BUTTON_PIN), GPIO(POWER_BUTTON_PORT)); // mask external interrupt of this pin only for this port
exti_set_trigger(EXTI(POWER_BUTTON_PIN), EXTI_TRIGGER_BOTH); // trigger on any activity of the power switch
exti_enable_request(EXTI(POWER_BUTTON_PIN)); // enable external interrupt
nvic_enable_irq(NVIC_EXTI_IRQ(POWER_BUTTON_PIN)); // enable interrupt
#if DEBUG
// enable functionalities for easier debug
@ -460,7 +470,7 @@ void main(void)
mux_select(tm1637); // selecting TM1637 display
led_tm1637_off(); // switch off TM1637 display
}
gpio_clear(GPIO(POWER_PORT), GPIO(POWER_PIN)); // switch power of by disconnecting from battery
gpio_clear(GPIO(POWER_SWITCH_PORT), GPIO(POWER_SWITCH_PIN)); // switch power of by disconnecting from battery
SCB_SCR |= SCB_SCR_SLEEPDEEP; // enable deep sleep
pwr_set_standby_mode(); // go to deep sleep
while (true); // we should be shut down at this point
@ -484,8 +494,8 @@ void main(void)
}
}
}
while (pwr_get_wakeup_flag()) { // someone is moving the clapperboard
pwr_clear_wakeup_flag(); // clear flag
while (keep_alive_flag) { // power switch is detecting movement to keep clapperboard running
keep_alive_flag = false; // clear flag
standby_timer = 0; // restart standby timer
}
if (action) { // go to sleep if nothing had to be done, else recheck for activity
@ -524,3 +534,9 @@ void TIM_ISR(FRAME_TIMER)(void)
}
}
/** power switch/keep alive activity */
void EXTI_ISR(POWER_BUTTON_PIN)(void)
{
exti_reset_request(EXTI(POWER_BUTTON_PIN)); // reset interrupt
keep_alive_flag = true; // perform button action
}