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请高手指教为什么IIc总线在proteus上无法仿真;程序有什么问题,用的是24c02。程序发上来了。望高手指点,感激不尽。
#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
sbit sda=P2^0;
sbit scl=P2^1;
void delay1(uchar z)
{
uchar x,y;
for(x=z;x>0;x--)
for(y=100;y>0;y--);
}
void delay()
{;;}
void start()
{
sda=1;
delay();
scl=1;
delay();
sda=0;
delay();
}
void stop()
{
scl=1;
delay();
sda=0;
delay();
sda=1;
delay();
}
void responds()
{
uchar i;
scl=1;
delay();
sda=1;
delay();
while((sda==1)&&(i<200)) i++;
scl=0;
delay();
}
void write_byte(uchar date)
{
uchar temp,i;
temp=date;
for(i=0;i<8;i++)
{
temp=temp<<1;
scl=0;
delay();
sda=CY;
delay();
scl=0;
delay();
}
scl=0;
delay();
sda=1;
delay();
}
uchar read_byte()
{
uchar i,temp;
for(i=0;i<8;i++)
{
scl=1;
delay();
temp=(temp<<1)|sda;
delay();
scl=0;
delay();
}
return temp;
}
void write(uchar addr,uchar date)
{
start();
responds();
write_byte(0xa0);
responds();
write_byte(addr);
responds();
write_byte(date);
responds();
stop();
}
uchar read(uchar addr)
{
uchar date;
start();
responds();
write_byte(0xa0);
responds();
write_byte(addr);
responds();
start();
write_byte(0xa1);
responds();
date=read_byte();
stop();
return date;
}
void main()
{
write(0x01,0xaa);
delay1(100);
P1=read(0x01);
delay1(100);
} |
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