历史上的今天
今天是：2025年04月23日（星期三）
2018年04月23日 | STM32F4(KEY)
2018-04-23 来源：eefocus
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
*
*
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 __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
*
*
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 "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] = 0;
keyInputLowCount[i] = 0;
keyStatus[i] = KEY_NoPress;
keyGetStatus[i] = KEY_NoPress;
keyShortPressCallback[i] = NULL;
keyLongPressCallback[i] = NULL;
}
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure = {0};
RCC_APB1PeriphClockCmd(KEY_RCC_APB1Periph_TIM, ENABLE);
TIM_TimeBaseInitStructure.TIM_Prescaler = KEY_TIM_Prescaler;
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInitStructure.TIM_Period = KEY_TIM_Period;
TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInit(KEY_TIM, &TIM_TimeBaseInitStructure);
TIM_ClearFlag(KEY_TIM, TIM_FLAG_Update);
TIM_ITConfig(KEY_TIM, TIM_IT_Update, ENABLE);
TIM_Cmd(KEY_TIM, ENABLE);
NVIC_InitTypeDef NVIC_InitStructure = {0};
NVIC_InitStructure.NVIC_IRQChannel = KEY_TIM_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = KEY_TIM_IRQ_PreemptionPriority;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = KEY_TIM_IRQ_SubPriority;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
/**
* @brief Key de-initializes.
* @param None.
* @return None.
*/
void KEY_DeInit(void)
{
for(int i = 0; i < KEYn; i++)
{
keyInputHighCount[i] = 0;
keyInputLowCount[i] = 0;
keyStatus[i] = KEY_NoPress;
keyGetStatus[i] = KEY_NoPress;
keyShortPressCallback[i] = NULL;
keyLongPressCallback[i] = NULL;
}
TIM_DeInit(KEY_TIM);
RCC_APB1PeriphClockCmd(KEY_RCC_APB1Periph_TIM, DISABLE);
NVIC_InitTypeDef NVIC_InitStructure = {0};
NVIC_InitStructure.NVIC_IRQChannel = KEY_TIM_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = KEY_TIM_IRQ_PreemptionPriority;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = KEY_TIM_IRQ_SubPriority;
NVIC_InitStructure.NVIC_IRQChannelCmd = DISABLE;
NVIC_Init(&NVIC_InitStructure);
}
/**
* @brief Get key status.
* @param [in] pin: That key.
* @return Key status.
*/
KEY_Status KEY_GetStatus(KEY_Pin pin)
{
KEY_Status status = KEY_NoPress;
if(keyGetStatus[pin] != KEY_NoPress)
{
status = keyGetStatus[pin];
keyGetStatus[pin] = KEY_NoPress;
}
return status;
}
/**
* @brief Set key short press callback.
* @param [in] pin: That key.
* @param [in] fun: Function pointer.
* @return None.
*/
void KEY_SetShortPressCallback(KEY_Pin pin, void (*fun)(void))
{
keyShortPressCallback[pin] = (__IO void (*)(void))fun;
}
/**
* @brief Set key long press callback.
* @param [in] pin: That key.
* @param [in] fun: Function pointer.
* @return None.
*/
void KEY_SetLongPressCallback(KEY_Pin pin, void (*fun)(void))
{
keyLongPressCallback[pin] = (__IO void (*)(void))fun;
}
/**
* @brief Clear key short press callback.
* @param [in] pin: That key.
* @param [in] fun: Function pointer.
* @return None.
*/
void KEY_ClearShortPressCallback(KEY_Pin pin)
{
keyShortPressCallback[pin] = NULL;
}
/**
* @brief Clear key long press callback.
* @param [in] pin: That key.
* @param [in] fun: Function pointer.
* @return None.
*/
void KEY_ClearLongPressCallback(KEY_Pin pin)
{
keyLongPressCallback[pin] = NULL;
}
/**
* @brief This function handles TIM Handler.
* @param None.
* @return None.
*/
void KEY_TIM_IRQHandler(void)
{
if(TIM_GetITStatus(KEY_TIM, TIM_IT_Update) != RESET)
{
TIM_ClearITPendingBit(KEY_TIM, TIM_IT_Update);
for(int i = 0; i < KEYn; i++)
{
if(GPIO_ReadInputDataBit(KEY_GPIO[i], KEY_GPIO_Pin[i]) == KEY_PRESS_STATUS)
{
keyInputLowCount[i]++;
if(keyInputLowCount[i] > 1)
{
keyInputHighCount[i] = 0;
}
if(keyInputLowCount[i] > 100)
{
keyInputLowCount[i] = 0;
keyStatus[i] = KEY_LongPress;
keyGetStatus[i] = KEY_LongPress;
if(keyLongPressCallback[i] != NULL)
{
keyLongPressCallback[i]();
}
}
}
else
{
keyInputHighCount[i]++;
if(keyInputHighCount[i] > 1)
{
if((keyStatus[i] == KEY_NoPress) && (keyInputLowCount[i] > 1))
{
keyInputHighCount[i] = 0;
keyInputLowCount[i] = 0;
keyStatus[i] = KEY_ShortPress;
keyGetStatus[i] = KEY_ShortPress;
if(keyShortPressCallback[i] != NULL)
{
keyShortPressCallback[i]();
}
}
else
{
keyInputHighCount[i] = 0;
keyInputLowCount[i] = 0;
keyStatus[i] = KEY_NoPress;
}
}
}
}
}
}
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 "KEY.h"
/* Macro definitions ---------------------------------------------------------*/
/* Type definitions ----------------------------------------------------------*/
/* Variable declarations -----------------------------------------------------*/
/* Variable definitions ------------------------------------------------------*/
static __IO int key1ShortPressCount = 0;
static __IO int key1LongPressCount = 0;
static __IO int key2ShortPressCount = 0;
static __IO int key2LongPressCount = 0;
/* Function declarations -----------------------------------------------------*/
static void key1ShortPressCallback(void);
static void key1LongPressCallback(void);
/* Function definitions ------------------------------------------------------*/
/**
* @brief Main program.
* @param None.
* @return None.
*/
int main(void)
{
KEY_Init();
KEY_SetShortPressCallback(KEY_Pin1, key1ShortPressCallback);
KEY_SetLongPressCallback(KEY_Pin1, key1LongPressCallback);
for(;;)
{
KEY_Status status = KEY_GetStatus(KEY_Pin2);
if(status != KEY_NoPress)
{
if(status == KEY_ShortPress)
{
key2ShortPressCount++;
}
else
{
key2LongPressCount++;
}
}
}
}
/**
* @brief Key 1 short press callback.
* @param None.
* @return None.
*/
static void key1ShortPressCallback(void)
{
key1ShortPressCount++;
}
/**
* @brief Key 1 long press callback.
* @param None.
* @return None.
*/
static void key1LongPressCallback(void)
{
key1LongPressCount++;
}
3，注意
修改接口需要注意，按键的检测电平、使用的TIM和增减按键的个数。对应修改KEY_PRESS_STATUS宏、TIM时钟配置函数和源文件的变量定义。
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