?? iic.h
字號:
#define uchar unsigned char
#define uint unsigned int
sbit sda=P1^0;
sbit scl=P1^1;void delay2()
{;;}
void delay1(uchar x)
{
uchar a,b;
for(a=x;a>0;a--)
for(b=100;b>0;b--);
}
void in()
{
sda=1;
// delay();
scl=1;
// delay();
}
void start()
{
sda=1;
delay2();
scl=1;
delay2();
sda=0;
delay2();
}
void stop()
{
sda=0;
delay2();
scl=1;
delay2();
sda=1;
delay2();
}
void respond()
{
uchar i;
scl=1;
delay2();
while((sda==1)&&(i<250))i++;
scl=0;
delay2();
}
void write(uchar date)
{
uchar temp,i;
temp=date;
scl=0;
delay2();
sda=1;
delay2();
for(i=0;i<8;i++)
{
temp=temp<<1;
sda=CY;
delay2();
scl=1;
delay2();
scl=0;
delay2();
}
sda=1;
delay2();
}
uchar read()
{
uchar i,j,k;
sda=1;
delay2();
scl=1;
delay2();
for(i=0;i<8;i++)
{
scl=1;
delay2();
j=sda;
k=k<<1|j;
scl=0;
delay2();
}
sda=1;
delay2();
return (k);
}
void WIIC(uchar add,uchar date)
{
start();
write(0xa0);
respond();
write(add);
respond();
write(date);
respond();
stop();
}
uchar RIIC(uchar add)
{
uchar date;
start();
write(0xa0);
respond();
write(add);
respond();
start();
write(0xa1);
respond();
date=read();
stop();
return date;
}
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