STM32F4(LED)

GitHub仓库：http://github.com/XinLiGitHub/STM32F4xx_LED_Example
PS：博文不再更新，后续更新会在GitHub仓库进行。


       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

1. /**
   
2.   ******************************************************************************
   
3.   * @file    LED.h
   
4.   * @author  XinLi
   
5.   * @version v1.0
   
6.   * @date    24-October-2017
   
7.   * @brief   Header file for LED.c module.
   
8.   ******************************************************************************
   
9.   * @attention
   
10.   *
    
11.   * <h2><center>Copyright © 2017 XinLi</center></h2>
    
12.   *
    
13.   * This program is free software: you can redistribute it and/or modify
    
14.   * it under the terms of the GNU General Public License as published by
    
15.   * the Free Software Foundation, either version 3 of the License, or
    
16.   * (at your option) any later version.
    
17.   *
    
18.   * This program is distributed in the hope that it will be useful,
    
19.   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    
20.   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
21.   * GNU General Public License for more details.
    
22.   *
    
23.   * You should have received a copy of the GNU General Public License
    
24.   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    
25.   *
    
26.   ******************************************************************************
    
27.   */
    
28. 
    
29. #ifndef __LED_H
    
30. #define __LED_H
    
31. 
    
32. #ifdef __cplusplus
    
33. extern "C" {
    
34. #endif
    
35. 
    
36. /* Header includes -----------------------------------------------------------*/
    
37. #include "stm32f4xx.h"
    
38. 
    
39. /* Macro definitions ---------------------------------------------------------*/
    
40. #define LEDn                      (4)
    
41. 
    
42. #define LED1_RCC_AHB1Periph_GPIO  RCC_AHB1Periph_GPIOC
    
43. #define LED1_GPIO                 GPIOC
    
44. #define LED1_GPIO_Pin             GPIO_Pin_0
    
45. 
    
46. #define LED2_RCC_AHB1Periph_GPIO  RCC_AHB1Periph_GPIOC
    
47. #define LED2_GPIO                 GPIOC
    
48. #define LED2_GPIO_Pin             GPIO_Pin_1
    
49. 
    
50. #define LED3_RCC_AHB1Periph_GPIO  RCC_AHB1Periph_GPIOB
    
51. #define LED3_GPIO                 GPIOB
    
52. #define LED3_GPIO_Pin             GPIO_Pin_3
    
53. 
    
54. #define LED4_RCC_AHB1Periph_GPIO  RCC_AHB1Periph_GPIOB
    
55. #define LED4_GPIO                 GPIOB
    
56. #define LED4_GPIO_Pin             GPIO_Pin_4
    
57. 
    
58. /* Type definitions ----------------------------------------------------------*/
    
59. typedef enum
    
60. {
    
61.   LED_Pin1 = 0,
    
62.   LED_Pin2 = 1,
    
63.   LED_Pin3 = 2,
    
64.   LED_Pin4 = 3
    
65. }LED_Pin;
    
66. 
    
67. typedef enum
    
68. {
    
69.   LED_Off = 0,
    
70.   LED_On  = 1
    
71. }LED_Status;
    
72. 
    
73. /* Variable declarations -----------------------------------------------------*/
    
74. /* Variable definitions ------------------------------------------------------*/
    
75. /* Function declarations -----------------------------------------------------*/
    
76. void LED_SetStatus(LED_Pin pin, LED_Status status);
    
77. LED_Status LED_GetStatus(LED_Pin pin);
    
78. 
    
79. /* Function definitions ------------------------------------------------------*/
    
80. 
    
81. #ifdef __cplusplus
    
82. }
    
83. #endif
    
84. 
    
85. #endif /* __LED_H */
    

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      LED.c文件

1. /**
   
2.   ******************************************************************************
   
3.   * @file    LED.c
   
4.   * @author  XinLi
   
5.   * @version v1.0
   
6.   * @date    24-October-2017
   
7.   * @brief   LED module driver.
   
8.   ******************************************************************************
   
9.   * @attention
   
10.   *
    
11.   * <h2><center>Copyright © 2017 XinLi</center></h2>
    
12.   *
    
13.   * This program is free software: you can redistribute it and/or modify
    
14.   * it under the terms of the GNU General Public License as published by
    
15.   * the Free Software Foundation, either version 3 of the License, or
    
16.   * (at your option) any later version.
    
17.   *
    
18.   * This program is distributed in the hope that it will be useful,
    
19.   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    
20.   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
21.   * GNU General Public License for more details.
    
22.   *
    
23.   * You should have received a copy of the GNU General Public License
    
24.   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    
25.   *
    
26.   ******************************************************************************
    
27.   */
    
28. 
    
29. /* Header includes -----------------------------------------------------------*/
    
30. #include "LED.h"
    
31. #include <stdbool.h>
    
32. 
    
33. /* Macro definitions ---------------------------------------------------------*/
    
34. /* Type definitions ----------------------------------------------------------*/
    
35. /* Variable declarations -----------------------------------------------------*/
    
36. /* Variable definitions ------------------------------------------------------*/
    
37. static      GPIO_TypeDef *LED_GPIO[LEDn]                = {LED1_GPIO, LED2_GPIO, LED3_GPIO, LED4_GPIO};
    
38. static      uint16_t      LED_GPIO_Pin[LEDn]            = {LED1_GPIO_Pin, LED2_GPIO_Pin, LED3_GPIO_Pin, LED4_GPIO_Pin};
    
39. static      uint32_t      LED_RCC_AHB1Periph_GPIO[LEDn] = {LED1_RCC_AHB1Periph_GPIO, LED2_RCC_AHB1Periph_GPIO, LED3_RCC_AHB1Periph_GPIO, LED4_RCC_AHB1Periph_GPIO};
    
40. static __IO LED_Status    ledStatus[LEDn]               = {LED_Off, LED_Off, LED_Off, LED_Off};
    
41. 
    
42. /* Function declarations -----------------------------------------------------*/
    
43. static void LED_Init(void);
    
44. 
    
45. /* Function definitions ------------------------------------------------------*/
    
46. 
    
47. /**
    
48.   * @brief  Led initializes.
    
49.   * @param  None.
    
50.   * @return None.
    
51.   */
    
52. static void LED_Init(void)
    
53. {
    
54.   static bool init_flag = false;
    
55.   
    
56.   if(init_flag == false)
    
57.   {
    
58.     init_flag = true;
    
59.    
    
60.     for(int i = 0; i < LEDn; i++)
    
61.     {
    
62.       GPIO_InitTypeDef GPIO_InitStructure = {0};
    
63.       
    
64.       RCC_AHB1PeriphClockCmd(LED_RCC_AHB1Periph_GPIO[i], ENABLE);
    
65.       
    
66.       GPIO_InitStructure.GPIO_Pin   = LED_GPIO_Pin[i];
    
67.       GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_OUT;
    
68.       GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
    
69.       GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    
70.       GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP;
    
71.       GPIO_Init(LED_GPIO[i], &GPIO_InitStructure);
    
72.       
    
73.       GPIO_WriteBit(LED_GPIO[i], LED_GPIO_Pin[i], (BitAction)LED_Off);
    
74.     }
    
75.   }
    
76. }
    
77. 
    
78. /**
    
79.   * @brief  Set led status.
    
80.   * @param  [in] pin:    That led.
    
81.   * @param  [in] status: Led status.
    
82.   * @return None.
    
83.   */
    
84. void LED_SetStatus(LED_Pin pin, LED_Status status)
    
85. {
    
86.   if(status != ledStatus[pin])
    
87.   {
    
88.     ledStatus[pin] = status;
    
89.    
    
90.     LED_Init();
    
91.    
    
92.     GPIO_WriteBit(LED_GPIO[pin], LED_GPIO_Pin[pin], (BitAction)status);
    
93.   }
    
94. }
    
95. 
    
96. /**
    
97.   * @brief  Get led status.
    
98.   * @param  [in] pin: That led.
    
99.   * @return Led status.
    
100.   */
     
101. LED_Status LED_GetStatus(LED_Pin pin)
     
102. {
     
103.   return ledStatus[pin];
     
104. }
     

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      main.c文件

1. /**
   
2.   ******************************************************************************
   
3.   * @file    main.c
   
4.   * @author  XinLi
   
5.   * @version v1.0
   
6.   * @date    24-October-2017
   
7.   * @brief   Main program body.
   
8.   ******************************************************************************
   
9.   * @attention
   
10.   *
    
11.   * <h2><center>Copyright © 2017 XinLi</center></h2>
    
12.   *
    
13.   * This program is free software: you can redistribute it and/or modify
    
14.   * it under the terms of the GNU General Public License as published by
    
15.   * the Free Software Foundation, either version 3 of the License, or
    
16.   * (at your option) any later version.
    
17.   *
    
18.   * This program is distributed in the hope that it will be useful,
    
19.   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    
20.   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
21.   * GNU General Public License for more details.
    
22.   *
    
23.   * You should have received a copy of the GNU General Public License
    
24.   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    
25.   *
    
26.   ******************************************************************************
    
27.   */
    
28. 
    
29. /* Header includes -----------------------------------------------------------*/
    
30. #include "main.h"
    
31. #include "Delay.h"
    
32. #include "LED.h"
    
33. 
    
34. /* Macro definitions ---------------------------------------------------------*/
    
35. /* Type definitions ----------------------------------------------------------*/
    
36. /* Variable declarations -----------------------------------------------------*/
    
37. /* Variable definitions ------------------------------------------------------*/
    
38. /* Function declarations -----------------------------------------------------*/
    
39. /* Function definitions ------------------------------------------------------*/
    
40. 
    
41. /**
    
42.   * @brief  Main program.
    
43.   * @param  None.
    
44.   * @return None.
    
45.   */
    
46. int main(void)
    
47. {
    
48.   for(;;)
    
49.   {
    
50.     Delay_ms(500);
    
51.     LED_SetStatus(LED_Pin1, LED_On);
    
52.     Delay_ms(500);
    
53.     LED_SetStatus(LED_Pin2, LED_On);
    
54.     Delay_ms(500);
    
55.     LED_SetStatus(LED_Pin1, LED_Off);
    
56.     Delay_ms(500);
    
57.     LED_SetStatus(LED_Pin2, LED_Off);
    
58.   }
    
59. }
    

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3，注意
       修改接口需要注意，LED的驱动方式和增减LED的个数。对应修改LED_Status枚举和源文件的变量定义。

刚刚通过审核，自己顶一下