STM32F4(LED)

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LED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

LED.h文件

/**

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

* @file LED.h

* @author XinLi

* @version v1.0

* @date 24-October-2017

* @brief Header file for LED.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 __LED_H

#define __LED_H

#ifdef __cplusplus

extern "C" {

#endif

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

#include "stm32f4xx.h"

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

#define LEDn (4)

#define LED1_RCC_AHB1Periph_GPIO RCC_AHB1Periph_GPIOC

#define LED1_GPIO GPIOC

#define LED1_GPIO_Pin GPIO_Pin_0

#define LED2_RCC_AHB1Periph_GPIO RCC_AHB1Periph_GPIOC

#define LED2_GPIO GPIOC

#define LED2_GPIO_Pin GPIO_Pin_1

#define LED3_RCC_AHB1Periph_GPIO RCC_AHB1Periph_GPIOB

#define LED3_GPIO GPIOB

#define LED3_GPIO_Pin GPIO_Pin_3

#define LED4_RCC_AHB1Periph_GPIO RCC_AHB1Periph_GPIOB

#define LED4_GPIO GPIOB

#define LED4_GPIO_Pin GPIO_Pin_4

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

typedef enum

{

LED_Pin1 = 0,

LED_Pin2 = 1,

LED_Pin3 = 2,

LED_Pin4 = 3

}LED_Pin;

typedef enum

{

LED_Off = 0,

LED_On = 1

}LED_Status;

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

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

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

void LED_SetStatus(LED_Pin pin, LED_Status status);

LED_Status LED_GetStatus(LED_Pin pin);

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

#ifdef __cplusplus

}

#endif

#endif /* __LED_H */

LED.c文件

/**

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

* @file LED.c

* @author XinLi

* @version v1.0

* @date 24-October-2017

* @brief LED 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 "LED.h"

#include

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

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

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

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

static GPIO_TypeDef *LED_GPIO[LEDn] = {LED1_GPIO, LED2_GPIO, LED3_GPIO, LED4_GPIO};

static uint16_t LED_GPIO_Pin[LEDn] = {LED1_GPIO_Pin, LED2_GPIO_Pin, LED3_GPIO_Pin, LED4_GPIO_Pin};

static uint32_t LED_RCC_AHB1Periph_GPIO[LEDn] = {LED1_RCC_AHB1Periph_GPIO, LED2_RCC_AHB1Periph_GPIO, LED3_RCC_AHB1Periph_GPIO, LED4_RCC_AHB1Periph_GPIO};

static __IO LED_Status ledStatus[LEDn] = {LED_Off, LED_Off, LED_Off, LED_Off};

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

static void LED_Init(void);

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

/**

* @brief Led initializes.

* @param None.

* @return None.

*/

static void LED_Init(void)

{

static bool init_flag = false;

if(init_flag == false)

{

init_flag = true;

for(int i = 0; i < LEDn; i++)

{

GPIO_InitTypeDef GPIO_InitStructure = {0};

RCC_AHB1PeriphClockCmd(LED_RCC_AHB1Periph_GPIO[i], ENABLE);

GPIO_InitStructure.GPIO_Pin = LED_GPIO_Pin[i];

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;

GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;

GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;

GPIO_Init(LED_GPIO[i], &GPIO_InitStructure);

GPIO_WriteBit(LED_GPIO[i], LED_GPIO_Pin[i], (BitAction)LED_Off);

}

}

}

/**

* @brief Set led status.

* @param [in] pin: That led.

* @param [in] status: Led status.

* @return None.

*/

void LED_SetStatus(LED_Pin pin, LED_Status status)

{

if(status != ledStatus[pin])

{

ledStatus[pin] = status;

LED_Init();

GPIO_WriteBit(LED_GPIO[pin], LED_GPIO_Pin[pin], (BitAction)status);

}

}

/**

* @brief Get led status.

* @param [in] pin: That led.

* @return Led status.

*/

LED_Status LED_GetStatus(LED_Pin pin)

{

return ledStatus[pin];

}

main.c文件

/**

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

* @file main.c

* @author XinLi

* @version v1.0

* @date 24-October-2017

* @brief Main program body.

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