STM32F4(KEY)
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KEY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
KEY.h文件
/**
******************************************************************************
* @file KEY.h
* @author XinLi
* @version v1.0
* @date 24-October-2017
* @brief Header file for KEY.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 __KEY_H
#define __KEY_H
#ifdef __cplusplus
extern "C" {
#endif
/* Header includes -----------------------------------------------------------*/
#include "stm32f4xx.h"
/* Macro definitions ---------------------------------------------------------*/
#define KEYn (3)
#define KEY1_RCC_AHB1Periph_GPIO RCC_AHB1Periph_GPIOC
#define KEY1_GPIO GPIOC
#define KEY1_GPIO_Pin GPIO_Pin_2
#define KEY2_RCC_AHB1Periph_GPIO RCC_AHB1Periph_GPIOC
#define KEY2_GPIO GPIOC
#define KEY2_GPIO_Pin GPIO_Pin_3
#define KEY3_RCC_AHB1Periph_GPIO RCC_AHB1Periph_GPIOC
#define KEY3_GPIO GPIOC
#define KEY3_GPIO_Pin GPIO_Pin_4
#define KEY_RCC_APB1Periph_TIM RCC_APB1Periph_TIM2
#define KEY_TIM TIM2
#define KEY_TIM_Prescaler (83) /*!< Clock divided to 1MHz. */
#define KEY_TIM_Period (4999) /*!< 5ms timer interrupt. */
#define KEY_TIM_IRQn TIM2_IRQn
#define KEY_TIM_IRQHandler TIM2_IRQHandler
#define KEY_TIM_IRQ_PreemptionPriority (0)
#define KEY_TIM_IRQ_SubPriority (0)
#define KEY_PRESS_STATUS Bit_SET
/* Type definitions ----------------------------------------------------------*/
typedef enum
{
KEY_Pin1 = 0,
KEY_Pin2 = 1,
KEY_Pin3 = 2
}KEY_Pin;
typedef enum
{
KEY_NoPress = 0,
KEY_ShortPress = 1,
KEY_LongPress = 2
}KEY_Status;
/* Variable declarations -----------------------------------------------------*/
/* Variable definitions ------------------------------------------------------*/
/* Function declarations -----------------------------------------------------*/
void KEY_Init(void);
void KEY_DeInit(void);
KEY_Status KEY_GetStatus(KEY_Pin pin);
void KEY_SetShortPressCallback(KEY_Pin pin, void (*fun)(void));
void KEY_SetLongPressCallback(KEY_Pin pin, void (*fun)(void));
void KEY_ClearShortPressCallback(KEY_Pin pin);
void KEY_ClearLongPressCallback(KEY_Pin pin);
/* Function definitions ------------------------------------------------------*/
#ifdef __cplusplus
}
#endif
#endif /* __KEY_H */
KEY.c文件
/**
******************************************************************************
* @file KEY.c
* @author XinLi
* @version v1.0
* @date 24-October-2017
* @brief KEY 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 "KEY.h"
#include
/* Macro definitions ---------------------------------------------------------*/
/* Type definitions ----------------------------------------------------------*/
/* Variable declarations -----------------------------------------------------*/
/* Variable definitions ------------------------------------------------------*/
static GPIO_TypeDef *KEY_GPIO[KEYn] = {KEY1_GPIO, KEY2_GPIO, KEY3_GPIO};
static uint16_t KEY_GPIO_Pin[KEYn] = {KEY1_GPIO_Pin, KEY2_GPIO_Pin, KEY3_GPIO_Pin};
static uint32_t KEY_RCC_AHB1Periph_GPIO[KEYn] = {KEY1_RCC_AHB1Periph_GPIO, KEY2_RCC_AHB1Periph_GPIO, KEY3_RCC_AHB1Periph_GPIO};
static __IO int keyInputHighCount[KEYn] = {0};
static __IO int keyInputLowCount[KEYn] = {0};
static __IO KEY_Status keyStatus[KEYn] = {KEY_NoPress, KEY_NoPress, KEY_NoPress};
static __IO KEY_Status keyGetStatus[KEYn] = {KEY_NoPress, KEY_NoPress, KEY_NoPress};
static __IO void (*keyShortPressCallback[KEYn])(void) = {NULL};
static __IO void (*keyLongPressCallback[KEYn])(void) = {NULL};
/* Function declarations -----------------------------------------------------*/
/* Function definitions ------------------------------------------------------*/
/**
* @brief Key initializes.
* @param None.
* @return None.
*/
void KEY_Init(void)
{
for(int i = 0; i < KEYn; i++)
{
GPIO_InitTypeDef GPIO_InitStructure = {0};
RCC_AHB1PeriphClockCmd(KEY_RCC_AHB1Periph_GPIO[i], ENABLE);
GPIO_InitStructure.GPIO_Pin = KEY_GPIO_Pin[i];
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_Init(KEY_GPIO[i], &GPIO_InitStructure);
keyInputHighCount[i]
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