STM32F4(LED)
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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.
***************************
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