长按短按控制LED灯-ESP32中断处理

#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"
#include <sys/time.h>

typedef enum {
  KEY_SHORT_PRESS = 1, 
  KEY_LONG_PRESS =2,
} alink_key_t;

#define GPIO_LED_IO       13
#define GPIO_LED_PIN_SEL  1ULL<<GPIO_LED_IO
#define GPIO_KEY_IO        14
#define GPIO_KEY_PIN_SEL  1ULL<<GPIO_KEY_IO

static xQueueHandle gpio_evt_queue = NULL;

//获取系统时间
static int64_t get_time(){
  struct timeval tv_now;
  gettimeofday(&tv_now, NULL);
  int64_t time_us = (int64_t)tv_now.tv_sec * 1000000L + (int64_t)tv_now.tv_usec;
  return time_us;
}

//按键中断处理函数
static void IRAM_ATTR gpio_isr_handler(void* arg)
{
    uint32_t gpio_num = (uint32_t) arg;
    xQueueSendFromISR(gpio_evt_queue, &gpio_num, NULL);
}

//任务处理
static void led_task(void* arg)
{
    uint32_t io_num;
    BaseType_t press_key = pdFALSE;
      BaseType_t lift_key = pdFALSE;
      int backup_time = 0;

    for(;;) {
        if(xQueueReceive(gpio_evt_queue, &io_num, portMAX_DELAY)) {
          printf("GPIO[%d] intr, val: %d
", io_num, gpio_get_level(io_num));

          //记录下用户按下按键的时间点
          if (gpio_get_level(io_num) == 0) {
            press_key = pdTRUE;
            backup_time = get_time();
            //如果当前GPIO口的电平已经记录为按下，则开始减去上次按下按键的时间点
          } else if (press_key) {
            //记录抬升时间点
            lift_key = pdTRUE;
            backup_time = get_time() - backup_time;
          }

          //按下标志位和按键弹起标志位都为1时候
          if (press_key & lift_key) {
            press_key = pdFALSE;
            lift_key = pdFALSE;

            //大于1秒为长按
            if (backup_time > 1000000) {
              printf("长按 ... 
");
              //关闭LED灯
              gpio_set_level(GPIO_LED_IO, 0);
            } else {
              printf("短按 ... 
");
              //打开LED灯
              gpio_set_level(GPIO_LED_IO, 1);
            }
          }
        }
    }
}

void app_main(void)
{
    //LED引脚配置
    gpio_config_t io_conf;
    io_conf.intr_type = GPIO_INTR_DISABLE;
    io_conf.mode = GPIO_MODE_OUTPUT;
    io_conf.pin_bit_mask = GPIO_LED_PIN_SEL;
    io_conf.pull_down_en = 0;
    io_conf.pull_up_en = 0;
    gpio_config(&io_conf);

    //按键中断配置
    io_conf.intr_type = GPIO_INTR_ANYEDGE;
    io_conf.pin_bit_mask = GPIO_KEY_PIN_SEL;
    io_conf.mode = GPIO_MODE_INPUT;
    io_conf.pull_up_en = 1;
    gpio_config(&io_conf);

    //创建消息队列处理引脚中断事件
    gpio_evt_queue = xQueueCreate(10, sizeof(uint32_t));
    //创建任务
    xTaskCreate(led_task, "led_task", 2048, NULL, 10, NULL);

    //第一个处理器核安装中断处理程序
    gpio_install_isr_service(0);
    //添加中断处理函数
    gpio_isr_handler_add(GPIO_KEY_IO, gpio_isr_handler, (void*) GPIO_KEY_IO);

    printf("Minimum free heap size: %d bytes
", esp_get_minimum_free_heap_size());

}

参考：https://gitee.com/EspressifSystems/esp-idf