参考

【编程之美】常用于单片机的接口适配器模式C语言实现.pdf

  • 基于以上内容稍作修改
  • 结合RT-Thread操作系统
  • 设计了面向对象的LED驱动接口
  • 可移植性大大提高，移植文件时无任何全局变量
  • 将对象的要素作为指针传递，无需考虑参数过大导致出入栈耗时问题
  • 函数作为方法封装

源文件

  1. /*
  2.  * Copyright (c) 2020 - ~, HIT_HERO Team
  3.  *
  4.  * LED MODULE SOUCE FILE
  5.  * Used in RT-Thread Operate System
  6.  *
  7.  * Change Logs:
  8.  * Date           Author       Notes            QQ
  9.  * 2020-06-02     WangXi          first version    1098547591
  10.  */
  12. #include "Module_LED.h"
  14. /* User Code Begin*/
  15. void LEDTest(int argc,char **argv)
  16. {
  17.     rt_err_t res = RT_EOK;
  19.     MODULE_LED dev_led_1 = {GET_PIN(C, 3),MODULE_LED_ON};
  20.     res = Module_Led_Config(&dev_led_1);
  21.     if(res != RT_EOK){
  22.         rt_kprintf("Error: Some wrong happened while led config\n");
  23.         return;
  24.     }
  26.     if (argc < 2){
  27.         rt_kprintf("Error: Command missing arguments\n");
  28.         return;
  29.     }
  31.     if(!rt_strcmp(argv[1], "-on")){
  32.         dev_led_1.Enable(&dev_led_1);
  33.     }
  34.     else if(!rt_strcmp(argv[1], "-off")){
  35.         dev_led_1.Disable(&dev_led_1);
  36.     }
  37.     else{
  38.         rt_kprintf("Error: Command not found\n");
  39.     }
  40. }
  41. MSH_CMD_EXPORT(LEDTest , LEDTest(PC3) <-on|-off>);
  42. /* User Code End */
  44. /* Static Method */
  45. static void Module_LedInit(MODULE_LED *module);
  46. static void Module_LedToggle(MODULE_LED *module);
  47. static void Module_LedEnable(MODULE_LED *module);
  48. static void Module_LedDisable(MODULE_LED *module);
  50. /* Global Method */
  51. rt_err_t Module_Led_Config(MODULE_LED *Dev_LED){
  52.     if(Dev_LED->Init==NULL && 
  53.         Dev_LED->Toggle==NULL && 
  54.         Dev_LED->Enable==NULL && 
  55.         Dev_LED->Disable == NULL
  56.     ){    
  57.         /* Link the Method */
  58.         Dev_LED->Init = Module_LedInit;
  59.         Dev_LED->Toggle = Module_LedToggle;
  60.         Dev_LED->Enable = Module_LedEnable;
  61.         Dev_LED->Disable = Module_LedDisable;    
  62.     }
  63.     else{
  64.         rt_kprintf("Warning: Module Led is Configed twice\n");
  65.         return RT_ERROR;
  66.     }
  68.     /* Device Init */
  69.     Dev_LED->Init(Dev_LED);
  70.     return RT_EOK;
  71. }
  73. /* Static Method */
  74. static void Module_LedInit(MODULE_LED *module){
  75.     rt_pin_mode(module->pin, PIN_MODE_OUTPUT);
  76.     rt_pin_write(module->pin, module->status);
  77. }
  79. static void Module_LedToggle(MODULE_LED *module){
  80.     rt_pin_write(module->pin, !rt_pin_read(module->pin));
  81.     module->status = rt_pin_read(module->pin);
  82. }
  84. static void Module_LedEnable(MODULE_LED *module){
  85.     rt_pin_write(module->pin, MODULE_LED_ON);
  86.     module->status = rt_pin_read(module->pin);
  87. }
  89. static void Module_LedDisable(MODULE_LED *module){
  90.     rt_pin_write(module->pin, MODULE_LED_OFF);
  91.     module->status = rt_pin_read(module->pin);
  92. }
  94. /************************ (C) COPYRIGHT 2020 WANGXI **************END OF FILE****/

头文件

  1. /*
  2.  * Copyright (c) 2020 - ~, HIT_HERO Team
  3.  *
  4.  * LED MODULE HEAD FILE
  5.  * Used in RT-Thread Operate System
  6.  *
  7.  * Change Logs:
  8.  * Date           Author       Notes            QQ
  9.  * 2020-06-02     WangXi          first version    1098547591
  10.  */
  11. #ifndef _MODULE_LED_H_
  12. #define _MODULE_LED_H_
  14. #define _LED_POSITIVE_POLE        //RESET Enable LED
  15. //#define _LED_NEGETIVE_POLE    //SET Enable LED
  17. #include <rtthread.h>
  18. #include <rtdevice.h>
  19. #include <board.h>
  21. enum LED_STATION
  22. {
  23. #ifdef _LED_POSITIVE_POLE
  24.     MODULE_LED_ON = 0,
  25.     MODULE_LED_OFF
  26. #endif
  28. #ifdef _LED_NEGETIVE_POLE
  29.     MODULE_LED_OFF = 0,
  30.     MODULE_LED_ON
  31. #endif    
  32. };
  34. struct _MODULE_LED
  35. {
  36.     /* Property */
  37.     rt_base_t pin;            /*!< Specifies the LED module pins to be configured.
  38.                             This parameter is defined by function @ref GET_PIN(GPIOPORT, GPIO_PIN_NUM) */
  39.     rt_bool_t status;        /*!< Specifies the LED init status.
  40.                             This parameter is defined by @ref LED_STATION */
  42.     /* Method */
  43.     void (*Init)(struct _MODULE_LED *module);
  44.     void (*Toggle)(struct _MODULE_LED *module);
  45.     void (*Enable)(struct _MODULE_LED *module);
  46.     void (*Disable)(struct _MODULE_LED *module);
  47. };
  48. typedef struct _MODULE_LED MODULE_LED;
  50. /* Glodal Method */
  51. rt_err_t Module_Led_Config(MODULE_LED *Dev_LED);
  53. #endif 
  54. /************************ (C) COPYRIGHT 2020 WANGXI **************END OF FILE****/

使用

  1.     MODULE_LED dev_SystemLed = {GET_PIN(C, 2),MODULE_LED_ON};
  2.     Module_Led_Config(&dev_SystemLed);
  3.     while (1){
  4.         rt_thread_mdelay(500);
  5.         dev_SystemLed.Toggle(&dev_SystemLed);
  6.     }