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Firmware Library Lights LED

Prerequisites to build a firmware library engineering template can refer to the following blog
https://blog.csdn.net/cainaiolin/article/details/52012786

Hardware foundation

There are three led lights on my development board. I choose to light PB5.

Say little about the code: Create a new file named "bsp_led.h"
The abbreviation of BoardSupport Packet (Board Support Packet) is often used in files defined by users themselves.

#ifndef __BSP_LED_H
#define __BSP_LED_H

//R red light
/*-----LED GPIO port of lamp, GPIO pin number and GPIO port clock*/
#define 	LED1_GPIO_PORT		GPIOB
#define		LED1_GPIO_CLK		RCC_APB2Periph_GPIOB
#define 	LED1_GPIO_PIN		GPIO_Pin_5

/*IO Control by Direct Operating Register*/
#define DiitalHi (p, i) {p-> BSRR = i;}// Output High Level
#define DiitalLo (p, i) {p-> BRR = i;}// Output is low level
#define digitalToggle(p,i) {p-> ODR ^= i;} // The output is in an abnormal state or

/*Define macros that control IO*/
#define LED1_TOGGLE			digitalToggle(LED1_GPIO_PORT,LED1_GPIO_PIN)
#define LED1_OFF			digitalHi(LED1_GPIO_PORT,LED1_GPIO_PIN)
#define LED1_ON				digitalLo(LED1_GPIO_PORT,LED1_GPIO_PIN)


/*LED_GPIO Initialization function*/
void LED_GPIO_Config(void)
{
	/*Define a structure of type GPIO_InitTypeDef*/
	GPIO_InitTypeDef GPIO_InitStructure;
	
	/*Turn on the relevant GPIO peripheral clock of LED*/
	RCC_APB2PeriphClockCmd(LED1_GPIO_CLK,ENABLE);
	
	/*Selection of GPIO pins to be controlled*/
	GPIO_InitStructure.GPIO_Pin  = LED1_GPIO_PIN;
	
	/*Set pin mode to universal push-pull output mode*/
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
	
	/*Set the output rate to 50MHz*/
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	
	 /*Select pins to be controlled*/
	GPIO_InitStructure.GPIO_Pin = LED1_GPIO_PIN;
	
	/*Initialize the GPIO port by calling the GPIO_Init function*/
	GPIO_Init(LED1_GPIO_PORT,&GPIO_InitStructure);
	
	/*Turn off all lights*/
	GPIO_SetBits(LED1_GPIO_PORT, LED1_GPIO_PIN);
	
}

#endif

Interpretation of Initialization Function Step of LED_GPIO_Config
1. Define a variable of type GPIO_InitTypeDef, which contains three variables uint16_t GPIO_Pin; GPIOSpeed_TypeDef GPIO_Speed; GPIOMode_TypeDef GPIO_Mode set pins, output rate and mode selection respectively.
2. Clocks that turn on relevant GPIO ports
3. Assignment of variables of type GPIO_InitTypeDef
4. Initialize the GPIO port by calling the GPIO_Init function
5.LED is turned off by default

Main function:main

#include"stm32f10x.h"
#include"bsp_led.h"
/*
	*@brief 	Main program
	*@param 	None
	*@retval  	Nane
*/

int main(void)
{
	LED_GPIO_Config();
	while(1)
	{
		LED1_ON	;
	}
}