PS2接口协议解析及应用(8)

PS2接口协议解析及应用

CLK =1;

DATA =1; //send 1 to P1 then read P1

if(CLK ==1)

{

delay_us(30);

}

if(CLK==1 && DATA==1) //send data

{

DATA =0; //start bit 0

delay_us(10);

CLK =0;

delay_us(5);

temp =x;

for(i=0;i<8;i++) //send 8 bits LSB first

{

CLK =1;

delay_us(5);

char_temp = temp & 0x01;

if ( char_temp == 0x01)

{

DATA =1;

}

else

{

DATA =0;

}

//DATA=(bit)(temp&0x01);

//LSB

delay_us(10);

CLK = 0;

delay_us(5);

temp = temp>>1;

}

CLK = 1; //send check bit