STM32F103 active buzzer driver

The active buzzer is connected to GPIOB Of the 5 foot
buzzer.h file

#ifndef __BUZZER_H
#define __BUZZER_H 
#include "sys.h"

#define BUZZERPORT GPIOB // Definition IO Interface 
#define BUZZER GPIO_Pin_5 // Definition IO Interface 



void BUZZER_Init(void);// initialization 
void BUZZER_BEEP1(void);// Let's go 

		 				    
#endif

buzzer.c file

#include "buzzer.h"
#include "delay.h"

void BUZZER_Init(void){
     // Interface initialization of buzzer 
	GPIO_InitTypeDef  GPIO_InitStructure; 	
    GPIO_InitStructure.GPIO_Pin = BUZZER; // Select the port number  
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; // choice IO How the interface works  
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; // Set up IO Interface speed （2/10/50MHz） 
	GPIO_Init(BUZZERPORT, &GPIO_InitStructure);	
	
	GPIO_WriteBit(BUZZERPORT,BUZZER,(BitAction)(1)); // Buzzer interface outputs high level 1 
}

void BUZZER_BEEP1(void){
     // The buzzer rings 
	u16 i;
	for(i=0;i<200;i++){
    
		GPIO_WriteBit(BUZZERPORT,BUZZER,(BitAction)(0)); // Buzzer interface output 0
		delay_us(500); // Time delay  
		GPIO_WriteBit(BUZZERPORT,BUZZER,(BitAction)(1)); // Buzzer interface outputs high level 1
		delay_us(500); // Time delay  
	}
}

/*  choice IO How the interface works ： GPIO_Mode_AIN  Analog input  GPIO_Mode_IN_FLOATING  Floating input  GPIO_Mode_IPD  Drop down input  GPIO_Mode_IPU  Pull up input  GPIO_Mode_Out_PP  Push pull output  GPIO_Mode_Out_OD  Open drain output  GPIO_Mode_AF_PP  Multiplexing push pull output  GPIO_Mode_AF_OD  Reuse open drain output  */

main.c

/*********************************************************************************************  The program name ：  Buzzer driver （ In the key control LED Add the prompt sound on the basis ）  Hardware support ： STM32F103C8  External crystal oscillator 8MHz RCC Function to set the dominant frequency 72MHz　 *********************************************************************************************/
#include "stm32f10x.h" //STM32 The header file 
#include "sys.h"
#include "delay.h"
#include "led.h"
#include "key.h" 
#include "flash.h" 

#include "buzzer.h"

#define FLASH_START_ADDR 0x0801f000 // The starting address for writing 


int main (void){
    // The main program 
	u16 a; // Defining variables 
	// Initializer 
	RCC_Configuration(); // The clock is set 
	LED_Init();//LED initialization 
	KEY_Init();// Key initialization 

	BUZZER_Init();// Buzzer initialization 
	BUZZER_BEEP1();// Buzzer sound 1

    a = FLASH_R(FLASH_START_ADDR);// Read from the address of the specified page FLASH

	GPIO_Write(LEDPORT,a|0xfffc&GPIO_ReadOutputData(LEDPORT)); // Direct numeric operations write variable values to LED（LED stay GPIOB Of the group PB0 and PB1 On ）

	// Main circulation 
	while(1){
    

		// Example 4： There is a latch 
		if(!GPIO_ReadInputDataBit(KEYPORT,KEY1)){
     // Read the level of the key interface 
			delay_ms(20); // Time delay 20ms To shake 
			if(!GPIO_ReadInputDataBit(KEYPORT,KEY1)){
     // Read the level of the key interface 
				// stay 2 individual LED Binary addition is displayed on the 
				a++; // Variable plus 1
				if(a>3){
     // When the variable is greater than 3 Shi Qing 0
					a=0; 
				}
				GPIO_Write(LEDPORT,a|0xfffc&GPIO_ReadOutputData(LEDPORT)); // Direct numeric operations write variable values to LED（LED stay GPIOB Of the group PB0 and PB1 On ）
			
				BUZZER_BEEP1();// Buzzer sound 1

				FLASH_W(FLASH_START_ADDR,a); // Write... From the address of the specified page FLASH
				while(!GPIO_ReadInputDataBit(KEYPORT,KEY1)); // Wait for the key to release  
			}
		}
	}
}

/* 【 Variable definitions 】 u32 a; // Definition 32 Bit unsigned variable a u16 a; // Definition 16 Bit unsigned variable a u8 a; // Definition 8 Bit unsigned variable a vu32 a; // Definition variable 32 Bit unsigned variable a vu16 a; // Definition variable  16 Bit unsigned variable a vu8 a; // Definition variable  8 Bit unsigned variable a uc32 a; // Define read-only 32 Bit unsigned variable a uc16 a; // Define read-only   Of 16 Bit unsigned variable a uc8 a; // Define read-only   Of 8 Bit unsigned variable a #define ONE 1 // Macro definition  delay_us(1); // Time delay 1 Microsecond  delay_ms(1); // Time delay 1 millisecond  delay_s(1); // Time delay 1 second  */