2410keyboard.c

在arm realview下的s3c2410开发板测试工程及代码

//2410keyboard.c
#include "Def.h"
#include "2410addr.h"
#include "2410lib.h"
#include "option.h"
#include "2410keyboard.h"

#define KEYA1 0x11
#define KEYA2 0x12
#define KEYA3 0x13
#define KEYA4 0x14

#define KEYB1 0x21
#define KEYB2 0x22
#define KEYB3 0x23
#define KEYB4 0x24

#define KEYC1 0x31
#define KEYC2 0x32
#define KEYC3 0x33
#define KEYC4 0x34

#define KEYD1 0x41
#define KEYD2 0x42
#define KEYD3 0x43
#define KEYD4 0x44


int Read_Row1(void);
int Read_Row2(void);
int Read_Row3(void);
int Read_Row4(void);
int Write_ColumnA(int val);
int Write_ColumnB(int val);
int Write_ColumnC(int val);
int Write_ColumnD(int val);
int Scan_Column(char column);

void Init_Keyboard(void);

/*initialize the key reg*/
void Init_Keyboard(void)
{
	//GPG2 0x01, GPG3 0x01, GPG5 0x01,GPG6 0x01, GPG7 0x01
	//rGPGCON=((rGPGCON & ~(0xf<<4)) & ~(0x3f<<10))| ((0x5<<4))|(0x15<<10));
	rGPGCON=((rGPGCON & ~((0xf<<4) |(0x3f<<10))))| ((0x1<<4));
	//GPE1 0x01,GPE12 0x01,GPE13 0x01
	rGPECON=(rGPECON & ~(0x3f<<22)) | (0x15<<22);
}/*end of init*/



/*read the 1 row,nSS1*/
int Read_Row1(void)
{
	U16 reg;
	reg=rGPGDAT;
	reg=reg | ~(0x1<<3);
	if(reg==0xffff)
		return 1;
	else
		return 0;
}/*end read*/	

/*read the 2 row,SPICLK1*/
int Read_Row2(void)
{
	U16 reg;
	reg=rGPGDAT;
	reg=reg | ~(0x1<<7);
	if(reg==0xffff)
		return 1;
	else
		return 0;
}/*end read*/	


/*read the 3 row,SPIMOSI1*/
int Read_Row3(void)
{
	U16 reg;
	reg=rGPGDAT;
	reg=reg | ~(0x1<<6);
	if(reg==0xffff)
		return 1;
	else
		return 0;
}/*end read*/	

/*read the 4 row,SPIMOSO1*/
int Read_Row4(void)
{
	U16 reg;
	reg=rGPGDAT;
	reg=reg | ~(0x1<<5);
	if(reg==0xffff)
		return 1;
	else
		return 0;
}/*end read*/	


/*write value to colunm A, SPIMOSO0*/
int Write_ColumnA(int val)
{
	if(val==0)
	{
		rGPEDAT=rGPEDAT & ~(0x1<<11);
		return 1;
	}		
	else if(val==1)
	{
		rGPEDAT=rGPEDAT | (0x1<<11);
	}		
	else
		return 0;
}/*end write*/	

/*write value to colunm B, SPIMOSI0*/
int Write_ColumnB(int val)
{
	if(val==0)
	{
		rGPEDAT=rGPEDAT & ~(0x1<<12);
		return 1;
	}		
	else if(val==1)
	{
		rGPEDAT=rGPEDAT | (0x1<<12);
	}		
	else
		return 0;
}/*end write*/


/*write value to colunm C, SPICLK0*/
int Write_ColumnC(int val)
{
	if(val==0)
	{
		rGPEDAT=rGPEDAT & ~(0x1<<13);
		return 1;
	}		
	else if(val==1)
	{
		rGPEDAT=rGPEDAT | (0x1<<13);
	}		
	else
		return 0;
}/*end write*/	

/*write value to colunm d, nSS0*/
int Write_ColumnD(int val)
{
	if(val==0)
	{
		rGPGDAT=rGPGDAT & ~(0x1<<2);
		return 1;
	}		
	else if(val==1)
	{
		rGPGDAT=rGPGDAT | (0x1<<2);
	}		
	else
		return 0;
}/*end write*/	

/*scan a column */	
int Scan_Column(char column)
{
	int row1,row2,row3,row4;

	switch(column)
	{
		case 'A':
			//scan columnA
			Write_ColumnA(0);	
			Write_ColumnB(1);
			Write_ColumnC(1);
			Write_ColumnD(1);
			row1=Read_Row1();
			row2=Read_Row2();
			row3=Read_Row3();
			row4=Read_Row4();
			if(!(row1 && row2 && row3 && row4))
			{
				if(row1==0)
					return KEYA1;
				else if(row2==0)
					return KEYA2;
				else if(row3==0)
					return KEYA3;
				else if(row4==0)
					return KEYA4;					
			}
			else
				return 0;	

		case 'B':
			//scan columnB
			Write_ColumnA(1);	
			Write_ColumnB(0);
			Write_ColumnC(1);
			Write_ColumnD(1);
			row1=Read_Row1();
			row2=Read_Row2();
			row3=Read_Row3();
			row4=Read_Row4();
			if(!(row1 && row2 && row3 && row4))
			{
				if(row1==0)
					return KEYB1;
				else if(row2==0)
					return KEYB2;
				else if(row3==0)
					return KEYB3;
				else if(row4==0)
					return KEYB4;					
			}	
			else
				return 0;

		case 'C':
			//scan columnC
			Write_ColumnA(1);	
			Write_ColumnB(1);
			Write_ColumnC(0);
			Write_ColumnD(1);
			row1=Read_Row1();
			row2=Read_Row2();
			row3=Read_Row3();
			row4=Read_Row4();
			if(!(row1 && row2 && row3 && row4))
			{
				if(row1==0)
					return KEYC1;
				else if(row2==0)
					return KEYC2;
				else if(row3==0)
					return KEYC3;
				else if(row4==0)
					return KEYC4;					
			}	
			else
				return 0;

		case 'D':
			//scan cloumnD 
			Write_ColumnA(1);	
			Write_ColumnB(1);
			Write_ColumnC(1);
			Write_ColumnD(0);
			row1=Read_Row1();
			row2=Read_Row2();
			row3=Read_Row3();
			row4=Read_Row4();
			if(!(row1 && row2 && row3 && row4))
			{
				if(row1==0)
					return KEYD1;
				else if(row2==0)
					return KEYD2;
				else if(row3==0)
					return KEYD3;
				else if(row4==0)
					return KEYD4;					
			}	
			else
				return 0;
		default:
			return 0;
	}
}/*end of column scaning*/	


/*scan key board*/
int Scan_Keyboard(void)
{
	int row1,row2,row3,row4;
	int i,j;
	char column;
	int keyNum;
	
	//write 0 to columnA,B,C,D
	Write_ColumnA(0);
	Write_ColumnB(0);
	Write_ColumnC(0);
	Write_ColumnD(0);

	//read row
	row1=Read_Row1();
	row2=Read_Row2();
	row3=Read_Row3();
	row4=Read_Row4();
	
	if(row1==1 && row2==1 && row3==1 && row4==1)
		return 0;//no key 
	
	for(i=0;i<10000;i++);//delay some time
	
	
	//scan column a
	column='A';
	keyNum=Scan_Column(column);
	if(keyNum!=0)
	{
		for(j=0;j++;j<100)
		{
			for(i=0;i<10000;i++);
			if((Scan_Column(column))!=keyNum)
				return 0;
		}
		return keyNum;					
	}		
	
	//scan column b
	column='B';
	keyNum=Scan_Column(column);
	if(keyNum!=0)
	{
		for(j=0;j++;j<100)
		{
			for(i=0;i<10000;i++);
			if((Scan_Column(column))!=keyNum)
				return 0;
		}
		return keyNum;					
	}		
	
	//scan column c
	column='C';
	keyNum=Scan_Column(column);
	if(keyNum!=0)
	{
		for(j=0;j++;j<100)
		{
			for(i=0;i<10000;i++);
			if((Scan_Column(column))!=keyNum)
				return 0;
		}
		return keyNum;					
	}		
	
	
	//scan column a
	column='D';
	keyNum=Scan_Column(column);
	if(keyNum!=0)
	{
		for(j=0;j++;j<100)
		{
			for(i=0;i<10000;i++);
			if((Scan_Column(column))!=keyNum)
				return 0;
		}
		return keyNum;					
	}		
	
	return 0;
}/*end of scan*/	


void Test_Keyboard(void)
{
	char c;
	int ikey;
	int i;
	Uart_Printf("Test Keyboad!\n\n");
	Uart_Printf("Type any key to quit!\n\n");
        rINTMSK = BIT_ALLMSK; 	

	Init_Keyboard();
	i=0;
	while(1)
	{
		c=0;
		//for(i=0;i<100;i++)
		Delay(200);
		if(i>0x100)
		{
			i=0;	
			Uart_Printf("To quit,please type 'x'!\n");
 		}			
		c=Uart_GetKey();
		i++;
		if(c!=0)
			break;
            	ikey=0;			
		ikey=Scan_Keyboard();
		if(ikey!=0)
		{
			if(ikey==KEYA1)
				Uart_Printf("key A1 is pressed!!\n");
			if(ikey==KEYA2)
				Uart_Printf("key A2 is pressed!!\n");
			if(ikey==KEYA3)
				Uart_Printf("key A3 is pressed!!\n");
			if(ikey==KEYA4)
				Uart_Printf("key A4 is pressed!!\n");
			
			if(ikey==KEYB1)
				Uart_Printf("key B1 is pressed!!\n");	
			if(ikey==KEYB2)
				Uart_Printf("key B2 is pressed!!\n");
			if(ikey==KEYB3)
				Uart_Printf("key B3 is pressed!!\n");
			if(ikey==KEYB4)
				Uart_Printf("key B4 is pressed!!\n");

			if(ikey==KEYC1)
				Uart_Printf("key C1 is pressed!!\n");	
			if(ikey==KEYC2)
				Uart_Printf("key C2 is pressed!!\n");
			if(ikey==KEYC3)
				Uart_Printf("key C3 is pressed!!\n");
			if(ikey==KEYC4)
				Uart_Printf("key C4 is pressed!!\n");

			if(ikey==KEYD1)
				Uart_Printf("key D1 is pressed!!\n");	
			if(ikey==KEYD2)
				Uart_Printf("key D2 is pressed!!\n");
			if(ikey==KEYD3)
				Uart_Printf("key D3 is pressed!!\n");
			if(ikey==KEYD4)
				Uart_Printf("key D4 is pressed!!\n");
		}						
         }		
}