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app: fix dial homing

This commit is contained in:
King Kévin 2022-07-25 15:40:56 +02:00
parent 2dd6e09cd0
commit 85fdb1bbac
1 changed files with 6 additions and 1 deletions
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7
application.c
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@ -72,7 +72,7 @@ static int8_t drv8825_direction = 0; /**< direction of the steps (1 = clockwise,
#define DRV8825_SPEED_LIMIT 420U
// dials position info
#define DIAL_SWITCH_PIN PB3 /**< pin connected to reed switch, pulled low when the hour dial is nearby */
#define DIAL_SWITCH_PIN PB4 /**< pin connected to reed switch, connected to ground when the hour dial is nearby */
#define DIAL_CYCLE_STEPS 11904U /**< number of steps for the hour dial to make a round */
#define DIAL_MIDNIGHT_STEPS 6557U /**< number of steps after dial detection for dials to show midnight */
static volatile uint32_t dial_steps = 0; /**< set to drv8825_steps when dial is nearby */
@ -972,6 +972,7 @@ void main(void)
gpio_mode_setup(GPIO_PORT(DIAL_SWITCH_PIN), GPIO_MODE_INPUT, GPIO_PUPD_PULLUP, GPIO_PIN(DIAL_SWITCH_PIN)); // set GPIO to input and pull up
exti_select_source(GPIO_EXTI(DIAL_SWITCH_PIN), GPIO_PORT(DIAL_SWITCH_PIN)); // mask external interrupt of this pin only for this port
exti_set_trigger(GPIO_EXTI(DIAL_SWITCH_PIN), EXTI_TRIGGER_FALLING); // trigger when magnet on dial is nearby
exti_reset_request(GPIO_EXTI(DIAL_SWITCH_PIN)); // ensure the interrupt flag is cleared
exti_enable_request(GPIO_EXTI(DIAL_SWITCH_PIN)); // enable external interrupt
nvic_enable_irq(GPIO_NVIC_EXTI_IRQ(DIAL_SWITCH_PIN)); // enable interrupt
puts_debug("OK\n");
@ -1224,6 +1225,10 @@ void TIM_ISR(DRV8825_STEP_TIMER)(void)
void GPIO_EXTI_ISR(DIAL_SWITCH_PIN)(void)
{
exti_reset_request(GPIO_EXTI(DIAL_SWITCH_PIN)); // reset interrupt
// I don't know why, but the RGBMATRIX_ISR does trigger this EXTI
if (gpio_get(GPIO_PORT(DIAL_SWITCH_PIN), GPIO_PIN(DIAL_SWITCH_PIN))) { // be sure the pin is actually low
return;
}
if (drv8825_steps > dial_steps + 1000) { // ignore going away debounce
dial_steps = drv8825_steps; // remember on which step we are
drv8825_steps = 0; // restart step counter