IIC 24c02写数据的问题

@蛇会大学未毕业 大神速速现身

void start() //IIC start
{
sda = 1;
scl = 1;
somenop();
sda = 0;
somenop();
scl = 0;
}
void stop() // IIC stop
{
sda = 0;
scl = 1;
somenop();
sda = 1;
somenop();
}
void response()
{
unsigned char i;
sda = 1;
scl = 1;
somenop();
while((sda==0) && (i<250))
i++;
scl = 0;
}
void write_byte(unsigned char dat)
{
unsigned char i,temp;
sda = 1;
temp = dat;
for(i=0;i<8;i++)
{
scl = 0;
somenop();
temp = temp<<1;
sda = CY;
somenop();
scl = 1;
somenop();
}
scl = 0;
sda = 1;
somenop();
}
unsigned char read_byte()
{
unsigned char i,temp;
sda = 1;
for(i=0;i<8;i++)
{
scl = 0;
somenop();
scl = 1;
somenop();
while(scl==0);
somenop();
temp = (temp<<1) | sda;
}
scl = 0;
sda = 1;
somenop();
return temp;
}
void write(unsigned char address,unsigned char dat)
{
start();
write_byte(0xa0);
response();
write_byte(address);
response();
write_byte(dat);
response();
// stop();
}
unsigned char read(unsigned char address)
{
unsigned char val;
start();
write_byte(0xa0);
response();
write_byte(address);
response();
// stop();
somenop();
start();
write_byte(0xa1);
response();
val = read_byte();
somenop();
// stop();
return val;
}
void write_time()
{
write(0x00,hour); //ÍùµØÖ·0дСʱ
// display(); //ÑÓʱ
somenop();
write(0x01,minute); //д·Ö
// display(); //ÑÓʱ
somenop();
write(0x02,second); //дÃë
somenop();
stop();
}
void read_time()
{
somenop();
hour = read(0x00);
somenop();
minute = read(0x01);
somenop();
second = read(0x02);
somenop();
stop();
}

是有这回事，手册有写
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