上一篇文章配置了基本环境，下面开始记录一些基本的外设驱动

1、GPIO使用

GPIO基本使用

#include "led_driver.h"

void led_init(gpio_num_t gpio_num)
{
    gpio_config_t cfg = {
        .pin_bit_mask = (1ull << gpio_num),
        .mode = GPIO_MODE_OUTPUT,
        .pull_up_en = 0,
        .pull_down_en = 1,
        .intr_type = 0,
    };

    gpio_config(&cfg);
}

.h文件使用如下所示：

#ifndef _LED_DRIVER__H_
#define _LED_DRIVER__H_

#include "driver/gpio.h"

void led_init(gpio_num_t gpio_num);

#endif // !_BASIC__H_

详细的使用可见下面这个图片

设置io状态变化

2、freertos框架

加入下面的头文件

代码示例如下

#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/timers.h"
#include "basic.h"
#include "led_driver.h"

#define LED_IO_NUM GPIO_NUM_2

TaskHandle_t LED_Handle; /*创建任务句柄*/
TimerHandle_t Timer0_Handle;

void led_task(void *param)
{
    gpio_set_direction(LED_IO_NUM, GPIO_MODE_DEF_OUTPUT);

    while (1)
    {
        // gpio_set_level(LED_IO_NUM, 1);
        // vTaskDelay(500 / portTICK_PERIOD_MS);
        // gpio_set_level(LED_IO_NUM, 0);
        // vTaskDelay(500 / portTICK_PERIOD_MS);

        printf("running \r\n");
        vTaskDelay(1000 / portTICK_PERIOD_MS);
    }
}

void Timer0_callback(TimerHandle_t time)
{
    static bool flag = 0;
    if (flag == 0)
    {
        flag = 1;
        gpio_set_level(LED_IO_NUM, 1);
    }
    else
    {
        flag = 0;
        gpio_set_level(LED_IO_NUM, 0);
    }
    xTimerReset(Timer0_Handle, portMAX_DELAY);
}

void app_main(void)
{
    xTaskCreate(led_task,
                "led_task",
                1024 * 2,
                NULL,
                1,
                &LED_Handle);

    Timer0_Handle = xTimerCreate("timer0", (1000 / portTICK_PERIOD_MS), pdFAIL, NULL, Timer0_callback);
    xTimerStart(Timer0_Handle, 0);
    // while (1)
    // {
    //     gpio_set_level(LED_IO_NUM, 1);
    //     vTaskDelay(500/portTICK_PERIOD_MS);
    //     gpio_set_level(LED_IO_NUM, 0);
    //     vTaskDelay(500/portTICK_PERIOD_MS);
    // }
}