串口控制LED灯-优快云博客

本文介绍了一个通过串口接收指令来控制三个不同LED灯开关的简单程序。该程序定义了六种不同的命令，分别用于开启和关闭每个LED灯，并实现了一个查找函数用于匹配接收到的指令。

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串口工具点灯

#define MAX 6
int cmp_func(const char *str, char *commnd)
{
    int i;
    for (i = 0; str[i] != 0; i++)
    {
        if (str[i] != commnd[i])
            return -1;
    }
    if (str[i] == commnd[i])
        return 0;
    else
        return -1;
}
//pe10--->led1
//pf10--->led2
//pf8--->led3
cmd_t cmd[MAX] = {
    [0] = {
        .cmd_arr = "led1on",
        .gpio = GPIOE,
        .pin = GPIO_PIN_10,
        .status = GPIO_SET,
        .gpio_write_p = hal_gpio_write,
    },
    [1] = {
        .cmd_arr = "led1off",
        .gpio = GPIOE,
        .pin = GPIO_PIN_10,
        .status = GPIO_RESET,
        .gpio_write_p = hal_gpio_write,
    },
    [2] = {
        .cmd_arr = "led2on",
        .gpio = GPIOF,
        .pin = GPIO_PIN_10,
        .status = GPIO_SET,
        .gpio_write_p = hal_gpio_write,
    },
    [3] = {
        .cmd_arr = "led2off",
        .gpio = GPIOF,
        .pin = GPIO_PIN_10,
        .status = GPIO_RESET,
        .gpio_write_p = hal_gpio_write,
    },
    [4] = {    
        .cmd_arr = "led3on",
        .gpio = GPIOE,
        .pin = GPIO_PIN_8,
        .status = GPIO_SET,
        .gpio_write_p = hal_gpio_write,
    },
    [5] = {
        .cmd_arr = "led3off",
        .gpio = GPIOE,
        .pin = GPIO_PIN_8,
        .status = GPIO_RESET,
        .gpio_write_p = hal_gpio_write,
    },
};
 
cmd_t *find_command(const char *str)
{

    for (int i = 0; i < MAX; i++)
    {
        if (!(cmp_func(str, cmd[i].cmd_arr)))
        {
            return &cmd[i];
        }
    }
    return 0; //不能返回NULL，因为是裸机开发，没有开辟空间
}

main

#include "led.h"
#include "uart4.h"
#include "command.h" 

int main(int argc, const char *argv[])
{
    char *uart_str;  
  
    hal_led_init();

    hal_uart4_init();     
                                                   
    commed_t *cmd_p;

    while (1)
    {
        hal_send_string("please input  ");
        uart_str = hal_recv_string(buffer);
        cmd_p = find_command(uart_str);
        if (cmd_p != 0) {
            cmd_p->hal_gpio_write_p(cmd_p->gpios, cmd_p->pins, cmd_p->statu);
        } else {
            hal_send_string("command not found!\n");
        } 
    }    
    return 0;
}

综合作业,LED点灯