4x4矩阵按键控制led

代码

#include

#include

#define uchar unsigned char

#define uint unsigned int

uchar code DSY_CODE[]=

{

  0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e,0x00

};

uchar code KeyCodeTable[]=

{

  0x11,0x12,0x14,0x18,0x21,0x22,0x24,0x28,0x41,0x42,0x44,0x48,0x81,0x82,0x84,0x88

};

void Delay()

{

  uchar i;

for(i=0;i<200;i++);

}

uchar Keys_Scan()

{

  uchar sCode,kCode,i,k;

P1 = 0xf0;

if((P1&0xf0)!=0xf0)

{

Delay();

if((P1&0xf0)!=0xf0)

{

sCode = 0xfe;

for(k=0;k<4;k++)

{

P1 = sCode;

if((P1&0xf0)!=0xf0)

{

kCode = ~P1;

for(i=0;i<16;i++)

{

if(kCode == KeyCodeTable[i])

return i;

}

}

else 

sCode = _crol_(sCode,1);

}

}

}

return -1;

}

void main()

{

  uchar KeyNO = -1;

uchar i,P2_LED,P3_LED;

while(1)

{

KeyNO = Keys_Scan();

if(KeyNO != -1)

{

P2_LED = 0xff;

P3_LED = 0xff;

for(i=0;i<=KeyNO;i++)

{

if(i<8)

P3_LED>>=1;

else

P2_LED>>=1;

}

P3 = P3_LED;

P2 = P2_LED;

}

}

}

硬件连接