ESP32 Forum

Code: Select all

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/queue.h"
#include "driver/gpio.h"

#define GPIO_BTN	GPIO_NUM_13

#define ESP_INTR_FLAG_DEFAULT 0

volatile uint32_t nbInt = 0;

static TaskHandle_t xHandlerTask = NULL;

static void IRAM_ATTR btn_isr_handler(void *arg) {
	BaseType_t xHigherPriorityTaskWoken;
	xHigherPriorityTaskWoken = pdFALSE;
	nbInt++;
	vTaskNotifyGiveFromISR(xHandlerTask, &xHigherPriorityTaskWoken);
	portYIELD_FROM_ISR();
}

static void btn_task(void *pvParameters) {
	const TickType_t xMaxExpectedBlockTime = pdMS_TO_TICKS(20);
	uint32_t ulEventsToProcess;
	for (;;) {
		ulEventsToProcess = ulTaskNotifyTake( pdTRUE, xMaxExpectedBlockTime);
		if (ulEventsToProcess != 0) {
			printf("GPIO intr, val: %d, nb notif: %d\n", gpio_get_level(GPIO_BTN), ulEventsToProcess);
		}
	}
}

void app_main() {
	gpio_config_t io_conf;
	io_conf.intr_type = GPIO_PIN_INTR_NEGEDGE;
	io_conf.pin_bit_mask = 1UL << GPIO_BTN;
	io_conf.mode = GPIO_MODE_INPUT;
	io_conf.pull_up_en = GPIO_PULLUP_ENABLE;
	io_conf.pull_down_en = GPIO_PULLDOWN_DISABLE;
	gpio_config(&io_conf);

	xTaskCreate(btn_task, "btn_task", 2048, NULL, 10, &xHandlerTask);

	gpio_install_isr_service(ESP_INTR_FLAG_DEFAULT);
	gpio_isr_handler_add(GPIO_BTN, btn_isr_handler, (void*) GPIO_BTN);

	int cnt = 0;
	for (;;) {
		printf("cnt: %d, nb int: %d\n", cnt++, nbInt);
		vTaskDelay(1000 / portTICK_RATE_MS);
	}
}

Code: Select all

cnt: 0, nb int: 0
cnt: 1, nb int: 0
cnt: 2, nb int: 0
cnt: 3, nb int: 0
GPIO intr, val: 0, nb notif: 1 <-- button pressed
GPIO intr, val: 0, nb notif: 1 <-- button released immediatly
GPIO intr, val: 1, nb notif: 9
cnt: 4, nb int: 11
cnt: 5, nb int: 11
cnt: 6, nb int: 11
cnt: 7, nb int: 11
GPIO intr, val: 0, nb notif: 1 <-- button pressed
cnt: 8, nb int: 12
cnt: 9, nb int: 12
GPIO intr, val: 0, nb notif: 1 <-- button released after few millis
GPIO intr, val: 1, nb notif: 8
cnt: 10, nb int: 21
cnt: 11, nb int: 21