用ESP32的SDK库，设置两个按键，分别为按键1和按键2，低电平触发中断，短按按键1打印“KEY1”，长按按键1打印“LONG1”，短按按键2打印“KEY2”，长按按键2打印“LONG2”，同时按两个按键时打印“OK”

代码如下：

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

#define KEY1_PIN GPIO_NUM_4
#define KEY2_PIN GPIO_NUM_5

#define SHORT_PRESS_TIME 50   // 短按时间，单位为毫秒
#define LONG_PRESS_TIME 500   // 长按时间，单位为毫秒

TaskHandle_t xTaskHandle1 = NULL;
TaskHandle_t xTaskHandle2 = NULL;

void key1_interrupt_handler(void* arg)
{
    static int press_time = 0;
    BaseType_t xHigherPriorityTaskWoken = pdFALSE;
    if(gpio_get_level(KEY1_PIN) == 0) {   // 按键按下
        press_time = xTaskGetTickCount();
    } else {   // 按键松开
        if(xTaskGetTickCount() - press_time < SHORT_PRESS_TIME / portTICK_PERIOD_MS) {   // 短按
            xTaskNotifyFromISR(xTaskHandle1, 0x01, eSetValueWithOverwrite, &xHigherPriorityTaskWoken);
        } else if(xTaskGetTickCount() - press_time >= LONG_PRESS_TIME / portTICK_PERIOD_MS) {   // 长按
            xTaskNotifyFromISR(xTaskHandle1, 0x02, eSetValueWithOverwrite, &xHigherPriorityTaskWoken);
        }
    }
    if(xHigherPriorityTaskWoken == pdTRUE) {
        portYIELD_FROM_ISR();
    }
}

void key2_interrupt_handler(void* arg)
{
    static int press_time = 0;
    BaseType_t xHigherPriorityTaskWoken = pdFALSE;
    if(gpio_get_level(KEY2_PIN) == 0) {   // 按键按下
        press_time = xTaskGetTickCount();
    } else {   // 按键松开
        if(xTaskGetTickCount() - press_time < SHORT_PRESS_TIME / portTICK_PERIOD_MS) {   // 短按
            xTaskNotifyFromISR(xTaskHandle2, 0x01, eSetValueWithOverwrite, &xHigherPriorityTaskWoken);
        } else if(xTaskGetTickCount() - press_time >= LONG_PRESS_TIME / portTICK_PERIOD_MS) {   // 长按
            xTaskNotifyFromISR(xTaskHandle2, 0x02, eSetValueWithOverwrite, &xHigherPriorityTaskWoken);
        }
    }
    if(xHigherPriorityTaskWoken == pdTRUE) {
        portYIELD_FROM_ISR();
    }
}

void key1_task(void* arg)
{
    uint32_t ulNotifiedValue;
    while(1) {
        xTaskNotifyWait(0x00, 0xff, &ulNotifiedValue, portMAX_DELAY);
        if(ulNotifiedValue == 0x01) {   // 短按
            printf("KEY1\n");
        } else if(ulNotifiedValue == 0x02) {   // 长按
            printf("LONG1\n");
        }
        ulNotifiedValue = 0;
    }
}

void key2_task(void* arg)
{
    uint32_t ulNotifiedValue;
    while(1) {
        xTaskNotifyWait(0x00, 0xff, &ulNotifiedValue, portMAX_DELAY);
        if(ulNotifiedValue == 0x01) {   // 短按
            printf("KEY2\n");
        } else if(ulNotifiedValue == 0x02) {   // 长按
            printf("LONG2\n");
        }
        ulNotifiedValue = 0;
    }
}

void app_main()
{
    gpio_config_t io_conf;
    io_conf.pin_bit_mask = (1ULL << KEY1_PIN) | (1ULL << KEY2_PIN);
    io_conf.mode = GPIO_MODE_INPUT;
    io_conf.pull_up_en = GPIO_PULLUP_ENABLE;
    io_conf.intr_type = GPIO_INTR_ANYEDGE;
    gpio_config(&io_conf);

    gpio_install_isr_service(0);
    gpio_isr_handler_add(KEY1_PIN, key1_interrupt_handler, NULL);
    gpio_isr_handler_add(KEY2_PIN, key2_interrupt_handler, NULL);

    xTaskCreate(key1_task, "key1_task", 2048, NULL, 10, &xTaskHandle1);
    xTaskCreate(key2_task, "key2_task", 2048, NULL, 10, &xTaskHandle2);

    while(1) {
        if(gpio_get_level(KEY1_PIN) == 0 && gpio_get_level(KEY2_PIN) == 0) {   // 同时按下两个按键
            printf("OK\n");
        }
        vTaskDelay(10 / portTICK_PERIOD_MS);
    }
}