2018年04月23日 | 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。

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 

  * 

  *

Copyright © 2017 XinLi

  * 

  * 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 

  * 

  *

Copyright © 2017 XinLi

  * 

  * 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)  

{  

  NVIC_InitTypeDef NVIC_InitStructure = {0};  

  NVIC_InitStructure.NVIC_IRQChannel                   = BUZZ_TIM_IRQn;  

  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = BUZZ_TIM_IRQ_PreemptionPriority;  

  NVIC_InitStructure.NVIC_IRQChannelSubPriority        = BUZZ_TIM_IRQ_SubPriority;  

  NVIC_InitStructure.NVIC_IRQChannelCmd                = ENABLE;  

  NVIC_Init(&NVIC_InitStructure);  

}  

/** 

  * @brief  Buzz initializes. 

  * @param  None. 

  * @return None. 

  */  

static void BUZZ_Init(void)  

{  

  static bool init_flag = false;  

  if(init_flag == false)  

  {  

    init_flag = true;  

    BUZZ_PwmInit();  

    BUZZ_NvicInit();  

  }  

}  

/** 

  * @brief  Set buzz status. 

  * @param  [in] status: Buzz status. 

  * @return None. 

  */  

void BUZZ_SetStatus(BUZZ_Status status)  

{  

  if(status != buzzStatus)  

  {  

    buzzStatus = status;  

    buzzCount  = 0;  

    BUZZ_Init();  

  }  

}  

/** 

  * @brief  Get buzz status. 

  * @param  None. 

  * @return Buzz status. 

  */  

BUZZ_Status BUZZ_GetStatus(void)  

{  

  return buzzStatus;  

}  

/** 

  * @brief  This function handles TIM Handler. 

  * @param  None. 

  * @return None. 

  */  

void BUZZ_TIM_IRQHandler(void)  

{  

  if(TIM_GetITStatus(BUZZ_TIM, TIM_IT_Update) != RESET)  

  {  

    TIM_ClearITPendingBit(BUZZ_TIM, TIM_IT_Update);  

    if(buzzStatus == BUZZ_Off)  

    {  

      buzzCount = 0;  

      BUZZ_TIM_SetCompare(BUZZ_TIM, 0);  

    }  

    else if(buzzStatus == BUZZ_Ring)  

    {  

      buzzCount = 0;  

      BUZZ_TIM_SetCompare(BUZZ_TIM, (BUZZ_TIM_Period + 1) / 2);  

    }  

    else if(buzzStatus == BUZZ_Drip)  

    {  

      if(buzzCount > 1999)  

      {  

        if(buzzCount > 3999)  

        {  

          buzzCount  = 0;  

          buzzStatus = BUZZ_Off;  

          BUZZ_TIM_SetCompare(BUZZ_TIM, 0);  

        }  

        else  

        {  

          buzzCount++;  

          BUZZ_TIM_SetCompare(BUZZ_TIM, 0);  

        }  

      }  

      else  

      {  

        buzzCount++;  

        BUZZ_TIM_SetCompare(BUZZ_TIM, (BUZZ_TIM_Period + 1) / 2);  

      }  

    }  

    else if(buzzStatus == BUZZ_Warning)  

    {  

      if(buzzCount > 1999)  

      {  

        if(buzzCount > 3999)  

        {  

          buzzCount = 0;  

          BUZZ_TIM_SetCompare(BUZZ_TIM, (BUZZ_TIM_Period + 1) / 2);  

        }  

        else  

        {  

          buzzCount++;  

          BUZZ_TIM_SetCompare(BUZZ_TIM, 0);  

        }  

      }  

      else  

      {  

        buzzCount++;  

        BUZZ_TIM_SetCompare(BUZZ_TIM, (BUZZ_TIM_Period + 1) / 2);  

      }  

    }  

    else  

    {  

      if(buzzCount > 999)  

      {  

        if(buzzCount > 1999)  

        {  

          buzzCount = 0;  

          BUZZ_TIM_SetCompare(BUZZ_TIM, (BUZZ_TIM_Period + 1) / 2);  

        }  

        else  

        {  

          buzzCount++;  

          BUZZ_TIM_SetCompare(BUZZ_TIM, 0);  

        }  

      }  

      else  

      {  

        buzzCount++;  

        BUZZ_TIM_SetCompare(BUZZ_TIM, (BUZZ_TIM_Period + 1) / 2);  

      }  

    }  

  }  

}  

      main.c文件

/** 

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

  * @file    main.c 

  * @author  XinLi 

  * @version v1.0 

  * @date    24-October-2017 

  * @brief   Main program body. 

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

  * @attention 

  * 

  *

Copyright © 2017 XinLi

  * 

  * 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 "main.h"  

#include "Delay.h"  

#include "BUZZ.h"  

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

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

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

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

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

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

/** 

  * @brief  Main program. 

  * @param  None. 

  * @return None. 

  */  

int main(void)  

{  

  for(;;)  

  {  

    Delay_s(5);  

    BUZZ_SetStatus(BUZZ_Drip);  

    Delay_s(5);  

    BUZZ_SetStatus(BUZZ_Ring);  

    Delay_s(5);  

    BUZZ_SetStatus(BUZZ_Warning);  

    Delay_s(5);  

    BUZZ_SetStatus(BUZZ_Danger);  

    Delay_s(5);  

    BUZZ_SetStatus(BUZZ_Off);  

  }  

}  

3，注意

       修改接口需要注意，蜂鸣器的驱动方式和使用的TIM。对应修改PWM输出电平和TIM时钟配置函数。