Hi!
I had initialised the ch variable before go to the loop
as follow. And after write to serial ROM i send the feedback ch variable to pc. it is equal with the character which i type.

But when i read back from serial rom, i don't read any things.

i don't know why?.

void WriteData()
{
char data ch;
ch = get_char();
while(ch != 0x0D)
{
i2c_writebyte(c++,ch);
outchar(ch);
ch = get_char();
}
wrom = 0;
ES = 1;
}