Touch key and key control corresponding LED status reversal

Mission requirements ：

As shown in the figure ：

 

Task a ：

Touch the key to control the corresponding LED State flip

 

Thought analysis ：

Touch key implementation LED The principle of state reversal is the same as that of mechanical key , And there is no need to use delay jitter

.
 
 

Completion code

int main (void){
    // The main program 
	RCC_Configuration(); // System clock initialization  
	LED_Init();//LED initialization 
	TOUCH_KEY_Init();// Key initialization 
	while(1){
    
					if(!GPIO_ReadInputDataBit(TOUCH_KEYPORT,TOUCH_KEY_C)){
     // Read the level of the key interface 
		
			if(!GPIO_ReadInputDataBit(TOUCH_KEYPORT,TOUCH_KEY_C)){
     // Read the level of the key interface 
			GPIO_WriteBit(LEDPORT,LED1,(BitAction)(1-GPIO_ReadOutputDataBit(LEDPORT,LED1))); //LED Take the opposite 
				while(!GPIO_ReadInputDataBit(TOUCH_KEYPORT,TOUCH_KEY_C)); // Wait for the key to release   Prevent the program from running repeatedly without releasing the key 
			}
		}
		
					if(!GPIO_ReadInputDataBit(TOUCH_KEYPORT,TOUCH_KEY_D)){
     // Read the level of the key interface 
		
			if(!GPIO_ReadInputDataBit(TOUCH_KEYPORT,TOUCH_KEY_D)){
     // Read the level of the key interface 
			GPIO_WriteBit(LEDPORT,LED2,(BitAction)(1-GPIO_ReadOutputDataBit(LEDPORT,LED2))); //LED Take the opposite 
				while(!GPIO_ReadInputDataBit(TOUCH_KEYPORT,TOUCH_KEY_D)); // Wait for the key to release   Prevent the program from running repeatedly without releasing the key 
			}
		}

		

	}
}

---

 

Task 2 ：

Key control corresponds to LED State flip

Code ：

//main.c

int main (void){
    // The main program 
	
	// Initializer 
	RCC_Configuration(); // The clock is set 
	LED_Init();//LED initialization 

	KEY_Init();// Key initialization 

	// Main circulation 
	// Initialization start LED Is off  
        GPIO_WriteBit(LEDPORT,LED3,(BitAction)(1));
	GPIO_WriteBit(LEDPORT,LED4,(BitAction)(1));
	while(1){
    

// There is a latch 

		if(!GPIO_ReadInputDataBit(KEYPORT,KEY1)){
     // Read the level of the key interface 
			delay_ms(20); // Delay de jitter 
			if(!GPIO_ReadInputDataBit(KEYPORT,KEY1)){
     // Read the level of the key interface 
				GPIO_WriteBit(LEDPORT,LED3,(BitAction)(1-GPIO_ReadOutputDataBit(LEDPORT,LED3))); //LED Take the opposite 
				while(!GPIO_ReadInputDataBit(KEYPORT,KEY1)); // Wait for the key to release  
			}
		}

		  		if(!GPIO_ReadInputDataBit(KEYPORT,KEY2)){
     // Read the level of the key interface 
			delay_ms(20); // Delay de jitter 
			if(!GPIO_ReadInputDataBit(KEYPORT,KEY2)){
     // Read the level of the key interface 
				GPIO_WriteBit(LEDPORT,LED4,(BitAction)(1-GPIO_ReadOutputDataBit(LEDPORT,LED4))); //LED Take the opposite 
				while(!GPIO_ReadInputDataBit(KEYPORT,KEY2)); // Wait for the key to release  
			}
		}
		


	}
}

Be careful ：
The corresponding should also be modified , Because the two one. LED The corresponding interface is inconsistent with that of the two small lights on the core board

led.h

#define LEDPORT GPIOA // Definition IO Interface 
#define LED3 GPIO_Pin_2 // Definition IO Interface 
#define LED4 GPIO_Pin_3 // Definition IO Interface 

led.c

void LED_Init(void){
     //LED Lamp interface initialization 
	GPIO_InitTypeDef  GPIO_InitStructure; 	
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOC,ENABLE);       
    GPIO_InitStructure.GPIO_Pin = LED3; // Select the port number （0~15 or all） 
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; // choice IO How the interface works  
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; // Set up IO Interface speed （2/10/50MHz） 
	GPIO_Init(GPIOB, &GPIO_InitStructure);			
}