工厂模式是抽象出来，使得对象的方法不依赖于具体实现。按照专业术语来说有个做依赖倒置原则，即高层模块不应依赖于低层模块，二者应依赖于抽象。抽象不应依赖于细节，细节应依赖于抽象。
以最简单的LED灯为例，我们可以将IO抽象出来
.文件
ypedefstructDRV_GPIO_Type{GPIO_TypeDef*GPIOx;uint32_tGPIO_PIN;//操作uint8_taction;//动作void(*Init)(conststructDRV_GPIO_Type*);void(*On)(structDRV_GPIO_Type*);void(*Off)(structDRV_GPIO_Type*);uint8_t(*ReadPin)(structDRV_GPIO_Type*);void(*Toggle)(structDRV_GPIO_Type*);}DRV_GPIO_T;externDRV_GPIO_T gtDrv_R_LED;externDRV_GPIO_T gtDrv_Y_LED;voidDrv_GPIO_ON(DRV_GPIO_T*pDrv);voidDrv_GPIO_OFF(DRV_GPIO_T*pDrv);uint8_tDrv_GPIO_ReadPin(DRV_GPIO_T*pDrv);voidDrv_GPIO_Toggle(DRV_GPIO_T*pDrv);.c文件
#include"drv_io.h"/* 实例化LED灯 红灯 */DRV_GPIO_T gtDrv_R_LED={.GPIOx=LED1_GPIO_PORT,.GPIO_PIN=LED1_GPIO_PIN,.On=Drv_GPIO_OFF,.Off=Drv_GPIO_ON,.ReadPin=Drv_GPIO_ReadPin,.Toggle=Drv_GPIO_Toggle,};/* 实例化 LED灯 黄灯*/DRV_GPIO_T gtDrv_Y_LED={.GPIOx=LED0_GPIO_PORT,.GPIO_PIN=LED0_GPIO_PIN,.action=0,.On=Drv_GPIO_OFF,.Off=Drv_GPIO_ON,.ReadPin=Drv_GPIO_ReadPin,.Toggle=Drv_GPIO_Toggle,};/** * @brief IO口输出高电平 * @param pDrv :IO口的结构体指针 * * @retval none */voidDrv_GPIO_ON(DRV_GPIO_T*pDrv){//GPIO_SetBits(pDrv->GPIOx, pDrv->GPIO_PIN);HAL_GPIO_WritePin(pDrv->GPIOx,pDrv->GPIO_PIN,GPIO_PIN_SET);pDrv->action=1;}/** * @brief IO口输出低电平 * @param pDrv :IO口的结构体指针 * * @retval none */voidDrv_GPIO_OFF(DRV_GPIO_T*pDrv){//GPIO_ResetBits(pDrv->GPIOx, pDrv->GPIO_PIN);HAL_GPIO_WritePin(pDrv->GPIOx,pDrv->GPIO_PIN,GPIO_PIN_RESET);pDrv->action=0;}/** * @brief IO口翻转 * @param pDrv :IO口的结构体指针 * * @retval none */voidDrv_GPIO_Toggle(DRV_GPIO_T*pDrv){HAL_GPIO_TogglePin(pDrv->GPIOx,pDrv->GPIO_PIN);}/** * @brief 读取IO口的电平 * @param pDrv :IO口的结构体指针 * * @retval lRet Bit_SET 或者 Bit_RESET */uint8_tDrv_GPIO_ReadPin(DRV_GPIO_T*pDrv){uint8_tlRet;//lRet = GPIO_ReadInputDataBit(pDrv->GPIOx, pDrv->GPIO_PIN);lRet=HAL_GPIO_ReadPin(pDrv->GPIOx,pDrv->GPIO_PIN);returnlRet;}测试实现
***@brief The application entry point.*@retvalint*/intmain(void){int16_ti=0;/* USER CODE BEGIN 1 *//* USER CODE END 1 *//* MCU Configuration--------------------------------------------------------*//* Reset of all peripherals, Initializes the Flash interface and the Systick. */HAL_Init();/* USER CODE BEGIN Init *//* USER CODE END Init *//* Configure the system clock */SystemClock_Config();/* USER CODE BEGIN SysInit */EventRecorderInitialize(EventRecordAll,1U);EventRecorderStart();/* USER CODE END SysInit *//* Initialize all configured peripherals */MX_GPIO_Init();/* USER CODE BEGIN 2 *//* 配置通道 0，上行配置*/// SEGGER_RTT_ConfigUpBuffer(0, "RTTUP", NULL, 0, SEGGER_RTT_MODE_NO_BLOCK_SKIP);// /* 配置通道 0，下行配置*/// SEGGER_RTT_ConfigDownBuffer(0, "RTTDOWN", NULL, 0, SEGGER_RTT_MODE_NO_BLOCK_SKIP);// SEGGER_RTT_SetTerminal(0);led_init();// multiTimerInstall(PlatformTicksGetFunc);//// multiTimerStart(&timer1, 500, LED_Task_callback, NULL);// multiTimerStart(&timer2, 100, KeyScan_Task_callback, NULL);// multiTimerStart(&timer3, 1000, DataProcess_Task_callback, NULL);// multiTimerStart(&timer4, 2000, Display_Task_callback, NULL);/* USER CODE END 2 *//* Infinite loop *//* USER CODE BEGIN WHILE */while(1){/* USER CODE END WHILE *//* USER CODE BEGIN 3 */gtDrv_R_LED.On(>Drv_R_LED);gtDrv_Y_LED.On(>Drv_Y_LED);HAL_Delay(500);gtDrv_R_LED.Off(>Drv_R_LED);gtDrv_Y_LED.Off(>Drv_Y_LED);HAL_Delay(500);}/* USER CODE END 3 */}可以看到2个LED等确实亮灭了。
