STM32F4(LED)

GitHub仓库：http://github.com/XinLiGitHub/STM32F4xx_LED_Example
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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。

. a2 L- w% o2 S6 q( s) U" q1，开发环境

     1，固件库：STM32F4xx_DSP_StdPeriph_Lib_V1.8.0
, `. l) }: t/ h' S     2，编译器：ARMCC V5.06
     3，IDE：Keil uVision5
0 S9 T3 `+ |! w8 \; Y. H     4，操作系统：Windows 10 专业版

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4 F# i9 d. {- y7 x  h+ a$ `      LED.h文件
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1. /**
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2.   ******************************************************************************
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3.   * @file    LED.h
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4.   * @author  XinLi
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5.   * @version v1.0
   
6.   * @date    24-October-2017
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7.   * @brief   Header file for LED.c module.
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8.   ******************************************************************************
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9.   * @attention
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10.   *
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11.   * <h2><center>Copyright © 2017 XinLi</center></h2>
    
12.   *
    
13.   * This program is free software: you can redistribute it and/or modify
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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.
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17.   *
    # i! f; e! o7 C2 J$ e8 g8 R
18.   * This program is distributed in the hope that it will be useful,
    
19.   * but WITHOUT ANY WARRANTY; without even the implied warranty of
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20.   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
21.   * GNU General Public License for more details.
    
22.   *
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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. 
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29. #ifndef __LED_H
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30. #define __LED_H
    
31. 
    
32. #ifdef __cplusplus
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33. extern "C" {
    
34. #endif
    
35. 
    
36. /* Header includes -----------------------------------------------------------*/
    
37. #include "stm32f4xx.h"
    
38. 
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39. /* Macro definitions ---------------------------------------------------------*/
    
40. #define LEDn                      (4)
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41. 
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42. #define LED1_RCC_AHB1Periph_GPIO  RCC_AHB1Periph_GPIOC
    
43. #define LED1_GPIO                 GPIOC
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44. #define LED1_GPIO_Pin             GPIO_Pin_0
    
45. 
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46. #define LED2_RCC_AHB1Periph_GPIO  RCC_AHB1Periph_GPIOC
    
47. #define LED2_GPIO                 GPIOC
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48. #define LED2_GPIO_Pin             GPIO_Pin_1
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49. 
    
50. #define LED3_RCC_AHB1Periph_GPIO  RCC_AHB1Periph_GPIOB
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51. #define LED3_GPIO                 GPIOB
    
52. #define LED3_GPIO_Pin             GPIO_Pin_3
    
53. 
    
54. #define LED4_RCC_AHB1Periph_GPIO  RCC_AHB1Periph_GPIOB
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55. #define LED4_GPIO                 GPIOB
    
56. #define LED4_GPIO_Pin             GPIO_Pin_4
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57. 
    
58. /* Type definitions ----------------------------------------------------------*/
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59. typedef enum
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60. {
    
61.   LED_Pin1 = 0,
    
62.   LED_Pin2 = 1,
    
63.   LED_Pin3 = 2,
    
64.   LED_Pin4 = 3
    
65. }LED_Pin;
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66. 
    
67. typedef enum
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68. {
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69.   LED_Off = 0,
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70.   LED_On  = 1
    
71. }LED_Status;
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72. 
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73. /* Variable declarations -----------------------------------------------------*/
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74. /* Variable definitions ------------------------------------------------------*/
    
75. /* Function declarations -----------------------------------------------------*/
    
76. void LED_SetStatus(LED_Pin pin, LED_Status status);
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77. LED_Status LED_GetStatus(LED_Pin pin);
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78. 
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79. /* Function definitions ------------------------------------------------------*/
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80. 
    
81. #ifdef __cplusplus
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82. }
    
83. #endif
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84. 
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85. #endif /* __LED_H */
    

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      LED.c文件

1. /**
   
2.   ******************************************************************************
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3.   * @file    LED.c
   
4.   * @author  XinLi
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5.   * @version v1.0
   
6.   * @date    24-October-2017
   
7.   * @brief   LED module driver.
   
8.   ******************************************************************************
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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.
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17.   *
    
18.   * This program is distributed in the hope that it will be useful,
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19.   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    " I* n; ^5 `. X+ A. ^
20.   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
21.   * GNU General Public License for more details.
    
22.   *
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23.   * You should have received a copy of the GNU General Public License
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24.   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    
25.   *
    
26.   ******************************************************************************
    
27.   */
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28. 
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29. /* Header includes -----------------------------------------------------------*/
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30. #include "LED.h"
    
31. #include <stdbool.h>
    
32. 
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33. /* Macro definitions ---------------------------------------------------------*/
    
34. /* Type definitions ----------------------------------------------------------*/
    
35. /* Variable declarations -----------------------------------------------------*/
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36. /* Variable definitions ------------------------------------------------------*/
    
37. static      GPIO_TypeDef *LED_GPIO[LEDn]                = {LED1_GPIO, LED2_GPIO, LED3_GPIO, LED4_GPIO};
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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};
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40. static __IO LED_Status    ledStatus[LEDn]               = {LED_Off, LED_Off, LED_Off, LED_Off};
    
41. 
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42. /* Function declarations -----------------------------------------------------*/
    
43. static void LED_Init(void);
    
44. 
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45. /* Function definitions ------------------------------------------------------*/
    
46. 
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47. /**
    
48.   * @brief  Led initializes.
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49.   * @param  None.
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50.   * @return None.
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51.   */
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52. static void LED_Init(void)
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53. {
    
54.   static bool init_flag = false;
    
55.   
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56.   if(init_flag == false)
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57.   {
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58.     init_flag = true;
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59.    
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60.     for(int i = 0; i < LEDn; i++)
    
61.     {
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62.       GPIO_InitTypeDef GPIO_InitStructure = {0};
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63.       
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64.       RCC_AHB1PeriphClockCmd(LED_RCC_AHB1Periph_GPIO[i], ENABLE);
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65.       
    
66.       GPIO_InitStructure.GPIO_Pin   = LED_GPIO_Pin[i];
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67.       GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_OUT;
    
68.       GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
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69.       GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
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70.       GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP;
    
71.       GPIO_Init(LED_GPIO[i], &GPIO_InitStructure);
    
72.       
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73.       GPIO_WriteBit(LED_GPIO[i], LED_GPIO_Pin[i], (BitAction)LED_Off);
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74.     }
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75.   }
    
76. }
    
77. 
    
78. /**
    
79.   * @brief  Set led status.
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80.   * @param  [in] pin:    That led.
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81.   * @param  [in] status: Led status.
    
82.   * @return None.
    
83.   */
    
84. void LED_SetStatus(LED_Pin pin, LED_Status status)
    
85. {
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86.   if(status != ledStatus[pin])
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87.   {
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88.     ledStatus[pin] = status;
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89.    
    
90.     LED_Init();
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91.    
    
92.     GPIO_WriteBit(LED_GPIO[pin], LED_GPIO_Pin[pin], (BitAction)status);
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93.   }
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94. }
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95. 
    
96. /**
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97.   * @brief  Get led status.
    
98.   * @param  [in] pin: That led.
    
99.   * @return Led status.
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100.   */
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101. LED_Status LED_GetStatus(LED_Pin pin)
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102. {
     
103.   return ledStatus[pin];
     
104. }
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! Y6 h# ]# v( \$ r      main.c文件
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1. /**
   
2.   ******************************************************************************
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3.   * @file    main.c
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4.   * @author  XinLi
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5.   * @version v1.0
   
6.   * @date    24-October-2017
   
7.   * @brief   Main program body.
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8.   ******************************************************************************
   . {4 j2 U2 }2 Y6 d
9.   * @attention
   
10.   *
    
11.   * <h2><center>Copyright © 2017 XinLi</center></h2>
    
12.   *
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13.   * This program is free software: you can redistribute it and/or modify
    0 P1 Z2 ?1 v% Y7 }/ L/ L
14.   * it under the terms of the GNU General Public License as published by
    7 {: l$ Z1 D1 f
15.   * the Free Software Foundation, either version 3 of the License, or
    , z6 X* w5 V1 _! g8 q
16.   * (at your option) any later version.
    5 a! p! h/ G' _' k: U6 Z& q
17.   *
    
18.   * This program is distributed in the hope that it will be useful,
      d( [5 s* D. @) I: L- b* y4 D
19.   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    
20.   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    : v7 Q% L% G7 o/ D* ~
21.   * GNU General Public License for more details.
    
22.   *
    
23.   * You should have received a copy of the GNU General Public License
    $ u$ s$ z: f* f- l7 O7 g) U9 g
24.   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    
25.   *
    
26.   ******************************************************************************
    
27.   */
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28. 
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29. /* Header includes -----------------------------------------------------------*/
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30. #include "main.h"
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31. #include "Delay.h"
    
32. #include "LED.h"
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33. 
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34. /* Macro definitions ---------------------------------------------------------*/
    
35. /* Type definitions ----------------------------------------------------------*/
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36. /* Variable declarations -----------------------------------------------------*/
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37. /* Variable definitions ------------------------------------------------------*/
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38. /* Function declarations -----------------------------------------------------*/
    
39. /* Function definitions ------------------------------------------------------*/
    
40. 
    
41. /**
    
42.   * @brief  Main program.
    
43.   * @param  None.
    
44.   * @return None.
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45.   */
    
46. int main(void)
    
47. {
    
48.   for(;;)
    
49.   {
    
50.     Delay_ms(500);
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51.     LED_SetStatus(LED_Pin1, LED_On);
    
52.     Delay_ms(500);
    
53.     LED_SetStatus(LED_Pin2, LED_On);
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54.     Delay_ms(500);
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55.     LED_SetStatus(LED_Pin1, LED_Off);
    
56.     Delay_ms(500);
    
57.     LED_SetStatus(LED_Pin2, LED_Off);
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58.   }
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59. }
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: w+ S8 R* \9 v: u$ Q. ~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。

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刚刚通过审核，自己顶一下