STM32 IO configuration lighting

1. Specific code of led.c:

/*----------------------------------------------------------*/

#include "led.h"

/* -------------------------------------------------------------------------

File name: led.c

Description: Configure the LED port according to the hardware connection and open the corresponding register

---------------------------------------------------------------------------*/

void LED_Init(void)

{

GPIO_InitTypeDef GPIO_InitStructure;

//Open the PB port clock

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);

//Open the PE port clock

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOE,ENABLE);

//PB5, PE5 pin settings

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;

//Port speed

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

//Port mode, this is output push-pull mode

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

GPIO_Init(GPIOB,&GPIO_InitStructure);

GPIO_Init(GPIOE,&GPIO_InitStructure);

}

Initialization: First, turn on the clock, set the pins, set the port speed, and set the port mode.

2. The header file of led.h

#ifndef __LED_H

#define __LED_H

#include "stm32f10x.h"

#define LED2_OFF GPIO_SetBits(GPIOE,GPIO_Pin_5)

#define LED2_ON GPIO_ResetBits(GPIOE,GPIO_Pin_5)

#define LED2_REV GPIO_WriteBit(GPIOE,GPIO_Pin_5,(BitAction)(1-(GPIO_ReadOutputDataBit(GPIOE,GPIO_Pin_5))))

#define LED3_OFF GPIO_SetBits(GPIOB,GPIO_Pin_5)

#define LED3_ON GPIO_ResetBits(GPIOB,GPIO_Pin_5)

#define LED3_REV GPIO_WriteBit(GPIOB,GPIO_Pin_5,(BitAction)(1-(GPIO_ReadOutputDataBit(GPIOB,GPIO_Pin_5))))

void LED_Init(void);

#endif

LED switch, flip

3. main.c function code

/*----------------------------------------------------------------------------------

File name: Control LED2 and LED3 to flash

Hardware platform: STM32F103 development board

Author: Qiushi

Firmware library: V3.5

-----------------------------------------------------------------------------------*/

/* Includes ------------------------------------------------------------------*/

#include "stm32f10x.h"

#include "led.h"

int main(void)

{

uint32_t i;

  LED_Heat();

LED2_ON;

LED3_OFF;

for(i=0; i < 0xffffff; i++)

  while (1)

  {

for(i = 0; i < 0xfffff;i++);

LED2_REV;

LED3_REV;

  }

}

When we use functions when writing code, we give priority to using function macros.