002 - STM32固件库GPIO（一）操作LED灯

news2024/9/21 2:44:22

STM32固件库操作LED灯

1、创建板级支持包文件

在User目录下创建LED文件夹，包含bsp_led.c及头文件bsp_led.h，之后在Keil中将bsp_led.c加入

在这里插入图片描述

2、程序代码

bsp_led.c

#include ".\LED\bsp_led.h"		//相对路径访问，可以在工程配置内将此路径加入

void LED_Config(void)
{
    //  创建GPIO_InitTypeDef类型结构体
    GPIO_InitTypeDef LED_InitStructure;
    
    //使能LED所在的GPIO外设时钟
    RCC_AHB1PeriphClockCmd(LED_R_CLK|LED_G_CLK|LED_B_CLK,ENABLE);

    //设置LED为输出模式
    LED_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
    
    //设置LED输出类型为推挽输出
    LED_InitStructure.GPIO_OType = GPIO_OType_PP;
    
    //设置LED引脚为上拉
    LED_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
    
    //设置LED输出速率围殴25MHz
    LED_InitStructure.GPIO_Speed = GPIO_Speed_25MHz;
    
    /*--------以上配置RGB均相同，配置一次即可--------*/
    
    //选择红灯引脚
    LED_InitStructure.GPIO_Pin = LED_R_PIN;
    //初始化红灯引脚
    GPIO_Init(LED_R_PORT,&LED_InitStructure);
    
    //选择绿灯引脚
    LED_InitStructure.GPIO_Pin = LED_G_PIN;
    //初始化绿灯引脚
    GPIO_Init(LED_G_PORT,&LED_InitStructure);
    
    //选择蓝灯引脚
    LED_InitStructure.GPIO_Pin = LED_G_PIN;
    //初始化蓝灯引脚
    GPIO_Init(LED_G_PORT,&LED_InitStructure);
    
    //配置完成后将所有灯关闭
    LED_OFF;
}

bsp_led.h

#ifndef __BSP_LED_H__
#define __BSP_LED_H__

#include "stm32f4xx.h"
#include "stm32f4xx_rcc.h"


// 红灯
#define LED_R_PIN   GPIO_Pin_10
#define LED_R_PORT  GPIOH
#define LED_R_CLK   RCC_AHB1Periph_GPIOH

// 绿灯
#define LED_G_PIN   GPIO_Pin_11
#define LED_G_PORT  GPIOH
#define LED_G_CLK   RCC_AHB1Periph_GPIOH

// 蓝灯
#define LED_B_PIN   GPIO_Pin_12
#define LED_B_PORT  GPIOH
#define LED_B_CLK   RCC_AHB1Periph_GPIOH


//操作寄存器方法控制LED输出
#define OutH(Port,Pin)      {Port->BSRRL = Pin;}        //输出高电平
#define OutL(Port,Pin)      {Port->BSRRH = Pin;}        //输出低电平
#define Toggle(Port,Pin)      {Port->ODR ^= Pin;}        //反转

//定义LED宏
#define LED_R_ON    OutL(LED_R_PORT,LED_R_PIN)
#define LED_R_OFF    OutH(LED_R_PORT,LED_R_PIN)
#define LED_R_TOGGLE    Toggle(LED_R_PORT,LED_R_PIN)

#define LED_G_ON    OutL(LED_G_PORT,LED_G_PIN)
#define LED_G_OFF    OutH(LED_G_PORT,LED_G_PIN)
#define LED_G_TOGGLE    Toggle(LED_G_PORT,LED_G_PIN)

#define LED_B_ON    OutL(LED_B_PORT,LED_B_PIN)
#define LED_B_OFF    OutH(LED_B_PORT,LED_B_PIN)
#define LED_B_TOGGLE    Toggle(LED_B_PORT,LED_B_PIN)


//基本色
#define LED_RED      LED_R_ON;LED_G_OFF;LED_B_OFF	//红灯亮

#define LED_GREEN    LED_R_OFF;LED_G_ON;LED_B_OFF	//绿灯亮

#define LED_BLUE     LED_R_OFF;LED_G_OFF;LED_B_ON	//蓝灯亮

#define LED_OFF      LED_R_OFF;LED_G_OFF;LED_B_OFF	//所有灯灭

void LED_Config(void);

#endif  /* __BSP_LED_H__ */

main.c

#include "stm32f4xx.h"
#include ".\LED\bsp_led.h"

//延时函数
void Delay(__IO uint32_t nCount)
{
    for(;nCount != 0;nCount--);
}

int main(void)
{
    while(1)
    {
        LED_R_ON;
        Delay(0xFFFFFF);
        
        LED_G_ON;
        Delay(0xFFFFFF);
        
        LED_B_ON;
        Delay(0xFFFFFF);
    }
}