5 应用开发如何包含头文件

发布于 2021-12-17 15:53:20 浏览：1878 订阅该版

achinwoo 2021-12-20

这家伙不懒，啥都会写

因为这里是smart的用户态实现代码，原来的宏内核的接口不可以使用，可以尝试下面代码实现：

该代码实现的功能：

1. 实现LED大约400ms周期闪烁
2. 实现按键检测，检测大于200ms的脉宽电平。

```c
#include <stdio.h>
#include "stdio.h"
#include "gpio_app.h"

#define LED_PIN  GET_PIN(GPIO_PORT_E, GPIO_PIN_2)   //替换你的GPIO
#define LED2_PIN GET_PIN(GPIO_PORT_E, GPIO_PIN_1)   //替换你的GPIO
#define BUT_PIN  GET_PIN(GPIO_PORT_G, GPIO_PIN_11)  //替换你的GPIO

static void _gpio_get(void *parameter)
{
    rt_device_t pin_dev;
    struct rt_device_pin_mode pin_mode;
    struct rt_device_pin_status pin_status;

pin_dev = rt_device_find("pin");

rt_device_open(pin_dev, RT_DEVICE_OFLAG_RDWR);

pin_mode.pin = BUT_PIN;
    pin_mode.mode = PIN_MODE_INPUT_PULLUP;
    rt_device_control(pin_dev, 0 ,(void*)&pin_mode);

pin_status.pin = BUT_PIN;

while (1)
    {
        rt_device_read(pin_dev, 0 ,(void*)&pin_status, sizeof(pin_status));
        printf("button %d!\n", pin_status.status);
        rt_thread_mdelay(200);
    }
}

int main(int argc, char **argv)
{
    
    rt_device_t pin_dev;
    struct rt_device_pin_mode pin_mode;
    struct rt_device_pin_status pin_status;
    rt_thread_t tid1;

printf("gpio example!\n");

pin_dev = rt_device_find("pin");
    if (pin_dev == RT_NULL)
    {
        rt_kprintf("not find pin device!\n");
        return -1;
    }
    rt_device_open(pin_dev, RT_DEVICE_OFLAG_RDWR);
    pin_mode.pin = LED_PIN;
    pin_mode.mode = PIN_MODE_OUTPUT;

rt_device_control(pin_dev, 0 ,(void*)&pin_mode);
    pin_status.pin = LED_PIN;

tid1 = rt_thread_create("gpio.get", _gpio_get, RT_NULL, 4096, 25, 50);
    if (tid1)
    {
        rt_thread_startup(tid1);
    }

while(1)
    {
        pin_status.status = PIN_LOW;
        rt_device_write(pin_dev, 0 ,(void*)&pin_status, sizeof(pin_status));
        rt_thread_mdelay(200);
        pin_status.status = PIN_HIGH;
        rt_device_write(pin_dev, 0 ,(void*)&pin_status, sizeof(pin_status));
        rt_thread_mdelay(200);
    }
    rt_device_close(pin_dev);
    return 0;
}
```