Hi all,

I am trying to configure the serial port on a Futurlec ADuC832 controller board to talk to a PC. I am developing in C using Keil (evaluation version). I am using HyperTerminal to read data off the COM port.

This is my code...

#include <stdio.h>
#include <ADuC832.h>

void main(void)
{
SCON = 0x52; // mode 1, 8-bit uart, enable
TMOD = 0x20; // timer 1, mode 2, 8-bit reload TH1 = 0xFD; // reload value for 9600 baud
TR1 = 1; // start timer 1

while (1)
{
int j;
printf( "Hello world..!" );
for ( j = 0; j < 1000; j++ ) { }
}
}

When I run HyperTerminal I expect to get the string Hello World..! repeating over on the screen however all I get is the character '-' repeating over on the screen. If I comment out the printf statement, rebuild the HEX file and run that, the characters stop appearing in HyperTerminal so data is being sent, it's just always the same character.

If I change the text from Hello World to something else I get the same '-' character repeating over.

Interestingly, if I reset the board with HyperTerminal still running I get "ADI 832 V20" printed on the screen so the connection seems okay. I just can't get the board to send my text strings.

What is the problem here...?

Thanks in advance,
Lyndon.