AT89S52 using uart send wrong data

[andy40185]

Hi all,

I have encountered a problem that I cannot send the correct data to the hyperterminal. I'm using KeilC51 complier and C++. Also, I set
the SMOD to 1 and using 11.0592 crystal(baud rate set to 4800). Sometimes send correct data, sometimes wrong.(like below figure)
I do not know what happen it is. Would anyone can help me?

*30 is a temperature

Also, the code as following;

void transmit_data(unsigned char p)
{
	TI=0;
	SBUF=p;
	while(TI==0);
}

void PC(unsigned char *information)
{
	while(*information)
	 {
		transmit_data(*information++);
	 }
}

 

[ud23]

just try and check on hyper terminal you are doing in debug mode try and see in real hyper terminal.

 

[papunblg]

Have you changed the bud rate etc settings(used in the program) of your PC's port ?