SmartGlass/stm32/HARDWARE/KEY/key.c

#include "key.h" 
#include "delay.h" 


void Key4x4_GPIO_Config(void)
{
  	GPIO_InitTypeDef GPIO_InitStructure;
  	
  	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOA,ENABLE);

		GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7; 
		GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz; 
		GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; 
		GPIO_Init(GPIOA, &GPIO_InitStructure);

  	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_10 | GPIO_Pin_11;	
  	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;       
  	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  	GPIO_Init(GPIOB, &GPIO_InitStructure);
		
		
		GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_8|GPIO_Pin_9;//KEY0-KEY1
		GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; //<EFBFBD><EFBFBD><EFBFBD>ó<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		GPIO_Init(GPIOB, &GPIO_InitStructure);//<EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>GPIOE4,3
}


u8 Key_Scan(void)
{
	u16 temp;
	u8 ucBackValue=16;
	
	PBout(1) = 0;
	PBout(0) = 1;
	PBout(10) = 1;
	PBout(11) = 1;
	
	temp=GPIO_ReadInputData(GPIOA); 
	
	temp=temp&0x00F0;    
	if (temp!=0x00F0)      
	{ 
		delay_ms(20);    
		temp=GPIO_ReadInputData(GPIOA); 
		temp=temp&0x00F0;
		if (temp!=0x00F0)     
		{ 
			temp=GPIO_ReadInputData(GPIOA)&0x00F0; 
			switch(temp)
			{ 
				case 0x00E0:
				ucBackValue = 15;break;
				case 0x00D0:
				ucBackValue = 11;break;
				case 0x00B0:
				ucBackValue = 0;break;
				case 0x0070:
				ucBackValue = 10;break;
				default:break;
			}
			while(temp!=0x00F0)   
			{ 
				temp=GPIO_ReadInputData(GPIOA); 
				temp=temp&0x00F0;
			}
		}
	}

	PBout(1) = 1;
	PBout(0) = 0;
	PBout(10) = 1;
	PBout(11) = 1;
	
	temp=GPIO_ReadInputData(GPIOA); 
	temp=temp&0x00F0;    
	if (temp!=0x00F0)      
	{ 
		delay_ms(20);      
		temp=GPIO_ReadInputData(GPIOA); 
		temp=temp&0x00F0;
		if (temp!=0x00F0)     
		{ 
			temp=GPIO_ReadInputData(GPIOA)&0x00F0; 
			switch(temp)
			{ 
				case 0x00E0:
					ucBackValue = 12; break;
				case 0x00D0:
					ucBackValue = 3; break;
				case 0x00B0:
					ucBackValue = 2; break;
				case 0x0070:
					ucBackValue = 1; break;
				default:break;
		}
			while(temp!=0x00F0)   
			{ 
				temp=GPIO_ReadInputData(GPIOA); 
				temp=temp&0x00F0;
			}
		}
	}

	
	PBout(1) = 1;
	PBout(0) = 1;
	PBout(10) = 0;
	PBout(11) = 1;
	
	temp=GPIO_ReadInputData(GPIOA);
	temp=temp&0x00F0;    
	if (temp!=0x00F0)      
	{ 
		delay_ms(20);      // <EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٶ<EFBFBD>
		temp=GPIO_ReadInputData(GPIOA); 
		temp=temp&0x00F0;
		if (temp!=0x00F0)     //<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٴθ<EFBFBD>4λȷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȫ1
		{ 
			temp=GPIO_ReadInputData(GPIOA)&0x00F0; //<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˴ΰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ
			switch(temp)
			{ 
				case 0x00E0:
				ucBackValue = 13; break;
				case 0x00D0:
				ucBackValue = 5; break;
				case 0x00B0:
				ucBackValue = 4; break;
				case 0x0070:
				ucBackValue = 3; break;
				default:break;
		}
		while(temp!=0x00F0)   //<EFBFBD>ȴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ſ<EFBFBD>
		{ 
			temp=GPIO_ReadInputData(GPIOA); 
			temp=temp&0x00F0;
		}
		}
	}
	//====<EFBFBD><EFBFBD>4<EFBFBD><EFBFBD><EFBFBD><EFBFBD>0==========
	PBout(1) = 1;
	PBout(0) = 1;
	PBout(10) = 1;
	PBout(11) = 0;
	
	temp=GPIO_ReadInputData(GPIOA); //<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڵõ<EFBFBD><EFBFBD><EFBFBD>ֵ
	temp=temp&0x00F0;    //<EFBFBD><EFBFBD><EFBFBD>ε<EFBFBD>4λ
	if (temp!=0x00F0)      //<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>4λ<EFBFBD><EFBFBD>ȫ<EFBFBD><EFBFBD>1
	{ 
		delay_ms(20);       // <EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٶ<EFBFBD>
		temp=GPIO_ReadInputData(GPIOA); 
		temp=temp&0x00F0;
		if (temp!=0x00F0)     //<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٴθ<EFBFBD>4λȷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȫ1
		{ 
			temp=GPIO_ReadInputData(GPIOA)&0x00F0; 
			switch(temp)
			{ 
				case 0x00E0:
				ucBackValue = 14; break;
				case 0x00D0:
				ucBackValue = 9; break;
				case 0x00B0:
				ucBackValue = 8; break;
				case 0x0070:
				ucBackValue = 7; break;
				default:break;
			}
			while(temp!=0x00F0)   //<EFBFBD>ȴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ſ<EFBFBD>
			{ 
				temp=GPIO_ReadInputData(GPIOA); 
				temp=temp&0x00F0;
			}
		}
	}
	return ucBackValue;
}