STM32F4(BUZZ)
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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。
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)
{
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