STM32F4(BUZZ) -

在实际的项目开发过程中，常常会遇到硬件电路的修改，然后修改的部分就需要修改驱动程序。想这样需求该来该去是程序员们最烦闷的事情（重复劳动痛不欲生啊~）。为了避免或减少重复劳动，就需要在程序的架构上下功夫。接下来以最常见的无源蜂鸣器驱动程序为例，进行程序结构设计。

本文引用地址: http://www.21ic.com/app/mcu/201806/764652.htm

1，开发环境

1，固件库：STM32F4xx_DSP_StdPeriph_Lib_V1.8.0

2，编译器：ARMCC V5.06

3，IDE：Keil uVision5

4，操作系统：Windows 10 专业版

2，程序源码

BUZZ.h文件

/**

******************************************************************************

* @file BUZZ.h

* @author XinLi

* @version v1.0

* @date 24-October-2017

* @brief Header file for BUZZ.c module.

******************************************************************************

* @attention

*

*

*

* This program is free software: you can redistribute it and/or modify

* it under the terms of the GNU General Public License as published by

* the Free Software Foundation, either version 3 of the License, or

* (at your option) any later version.

*

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License for more details.

*

* You should have received a copy of the GNU General Public License

* along with this program. If not, see .

*

******************************************************************************

*/

#ifndef __BUZZ_H

#define __BUZZ_H

#ifdef __cplusplus

extern "C" {

#endif

/* Header includes -----------------------------------------------------------*/

#include "stm32f4xx.h"

/* Macro definitions ---------------------------------------------------------*/

#define BUZZ_RCC_AHB1Periph_GPIO RCC_AHB1Periph_GPIOB

#define BUZZ_GPIO GPIOB

#define BUZZ_GPIO_Pin GPIO_Pin_8

#define BUZZ_GPIO_PinSource GPIO_PinSource8

#define BUZZ_GPIO_AF_TIM GPIO_AF_TIM4

#define BUZZ_RCC_APB1Periph_TIM RCC_APB1Periph_TIM4

#define BUZZ_TIM TIM4

#define BUZZ_TIM_Prescaler (83) /*!< Clock divided to 1MHz. */

#define BUZZ_TIM_Period (249) /*!< 250us timer interrupt. */

#define BUZZ_TIM_OCPolarity TIM_OCPolarity_High

#define BUZZ_TIM_OCInit TIM_OC3Init

#define BUZZ_TIM_OCPreloadConfig TIM_OC3PreloadConfig

#define BUZZ_TIM_SetCompare TIM_SetCompare3

#define BUZZ_TIM_IRQn TIM4_IRQn

#define BUZZ_TIM_IRQHandler TIM4_IRQHandler

#define BUZZ_TIM_IRQ_PreemptionPriority (0)

#define BUZZ_TIM_IRQ_SubPriority (0)

/* Type definitions ----------------------------------------------------------*/

typedef enum

{

BUZZ_Off = 0,

BUZZ_Ring = 1,

BUZZ_Drip = 2,

BUZZ_Warning = 3,

BUZZ_Danger = 4

}BUZZ_Status;

/* Variable declarations -----------------------------------------------------*/

/* Variable definitions ------------------------------------------------------*/

/* Function declarations -----------------------------------------------------*/

void BUZZ_SetStatus(BUZZ_Status status);

BUZZ_Status BUZZ_GetStatus(void);

/* Function definitions ------------------------------------------------------*/

#ifdef __cplusplus

}

#endif

#endif /* __BUZZ_H */

BUZZ.c文件

/**

******************************************************************************

* @file BUZZ.c

* @author XinLi

* @version v1.0

* @date 24-October-2017

* @brief BUZZ module driver.

******************************************************************************

* @attention

*

*

*

* This program is free software: you can redistribute it and/or modify

* it under the terms of the GNU General Public License as published by

* the Free Software Foundation, either version 3 of the License, or

* (at your option) any later version.

*

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License for more details.

*

* You should have received a copy of the GNU General Public License

* along with this program. If not, see .

*

******************************************************************************

*/

/* Header includes -----------------------------------------------------------*/

#include "BUZZ.h"

#include

/* Macro definitions ---------------------------------------------------------*/

/* Type definitions ----------------------------------------------------------*/

/* Variable declarations -----------------------------------------------------*/

/* Variable definitions ------------------------------------------------------*/

static __IO BUZZ_Status buzzStatus = BUZZ_Off;

static __IO int buzzCount = 0;

/* Function declarations -----------------------------------------------------*/

static void BUZZ_PwmInit(void);

static void BUZZ_NvicInit(void);

static void BUZZ_Init(void);

/* Function definitions ------------------------------------------------------*/

/**

* @brief Buzz pwm initializes.

* @param None.

* @return None.

*/

static void BUZZ_PwmInit(void)

{

GPIO_InitTypeDef GPIO_InitStructure = {0};

TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure = {0};

TIM_OCInitTypeDef TIM_OCInitStructure = {0};

RCC_AHB1PeriphClockCmd(BUZZ_RCC_AHB1Periph_GPIO, ENABLE);

RCC_APB1PeriphClockCmd(BUZZ_RCC_APB1Periph_TIM, ENABLE);

GPIO_InitStructure.GPIO_Pin = BUZZ_GPIO_Pin;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;

GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;

GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;

GPIO_Init(BUZZ_GPIO, &GPIO_InitStructure);

GPIO_PinAFConfig(BUZZ_GPIO, BUZZ_GPIO_PinSource, BUZZ_GPIO_AF_TIM);

TIM_TimeBaseStructure.TIM_Prescaler = BUZZ_TIM_Prescaler;

TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

TIM_TimeBaseStructure.TIM_Period = BUZZ_TIM_Period;

TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;

TIM_TimeBaseInit(BUZZ_TIM, &TIM_TimeBaseStructure);

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;

TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;

TIM_OCInitStructure.TIM_Pulse = 0;

TIM_OCInitStructure.TIM_OCPolarity = BUZZ_TIM_OCPolarity;

BUZZ_TIM_OCInit(BUZZ_TIM, &TIM_OCInitStructure);

BUZZ_TIM_OCPreloadConfig(BUZZ_TIM, TIM_OCPreload_Enable);

TIM_ARRPreloadConfig(BUZZ_TIM, ENABLE);

TIM_ITConfig(BUZZ_TIM, TIM_IT_Update, ENABLE);

TIM_Cmd(BUZZ_TIM, ENABLE);

}

/**

* @brief Buzz nvic initializes.

* @param None.

* @return None.

*/

static void BUZZ_NvicInit(void)

{