diff options
| -rw-r--r-- | ports/esp32s2/common-hal/frequencyio/FrequencyIn.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/ports/esp32s2/common-hal/frequencyio/FrequencyIn.c b/ports/esp32s2/common-hal/frequencyio/FrequencyIn.c index fce1d34d8..ec7ebb21a 100644 --- a/ports/esp32s2/common-hal/frequencyio/FrequencyIn.c +++ b/ports/esp32s2/common-hal/frequencyio/FrequencyIn.c @@ -35,7 +35,7 @@ #include "common-hal/microcontroller/Pin.h" -static void frequencyin_interrupt_handler(void *self_in) { +static void IRAM_ATTR frequencyin_interrupt_handler(void *self_in) { frequencyio_frequencyin_obj_t* self = self_in; // get counter value int16_t count; @@ -44,6 +44,10 @@ static void frequencyin_interrupt_handler(void *self_in) { // reset counter pcnt_counter_clear(self->unit); + + // reset interrupt + TIMERG0.int_clr.t0 = 1; + TIMERG0.hw_timer[0].config.alarm_en = 1; } static void init_timer(frequencyio_frequencyin_obj_t* self, uint16_t capture_period) { @@ -62,7 +66,7 @@ static void init_timer(frequencyio_frequencyin_obj_t* self, uint16_t capture_per timer_set_counter_value(TIMER_GROUP_0, TIMER_0, 0); timer_set_alarm_value(TIMER_GROUP_0, TIMER_0, capture_period * 1000000); timer_enable_intr(TIMER_GROUP_0, TIMER_0); - timer_isr_register(TIMER_GROUP_0, TIMER_0, &frequencyin_interrupt_handler, (void *)self, 0, &self->handle); + timer_isr_register(TIMER_GROUP_0, TIMER_0, frequencyin_interrupt_handler, (void *)self, ESP_INTR_FLAG_IRAM, &self->handle); // Start timer timer_start(TIMER_GROUP_0, TIMER_0); |