Setting S0RIR

Hi Again

This code works at 9600 baud but seems to have problems at higher rates and is contrary to the manual.

uint8_t GetByte( void )
{
	uint8_t rx_char ;

	while( !S0EIR && !S0RIR ) ;

	rx_char = ( uint8_t ) S0RBUF ;
        S0RIR = 0 ;
	S0EIR = 0 ;

	return rx_char ;
}

uint8_t GetByte( void )
{
	uint8_t rx_char ;

	while( !S0RIR ) ;

	rx_char = ( uint8_t ) S0RBUF ;
        S0RIR = 0 ;

	return rx_char ;
}

Hi Again

This code works at 9600 baud but seems to have problems at higher rates and is contrary to the manual.

uint8_t GetByte( void )
{
	uint8_t rx_char ;

	while( !S0EIR && !S0RIR ) ;

	rx_char = ( uint8_t ) S0RBUF ;
        S0RIR = 0 ;
	S0EIR = 0 ;

	return rx_char ;
}

uint8_t GetByte( void )
{
	uint8_t rx_char ;

	while( !S0RIR ) ;

	rx_char = ( uint8_t ) S0RBUF ;
        S0RIR = 0 ;

	return rx_char ;
}

Well, without an in-circuit debugger you can never be sure what's going on. Besides, hardware problems is always a possibility (floating NMI pin, for example.)
Set up debugging with Monitor166. Even if there is no external RAM in your target hardware, you should be able to debug small pieces of code with 6Kbyte of XRAM.

Good luck!
- mike

Servicing my non-running watchdog timer means that the code now works fine.

    while( !S0RIR )
    {
        _srvwdt_() ;
    }

    rx_char = ( uint8_t ) S0RBUF ;
    S0RIR = 0 ;

The watchdog timer is running unless you stop it before an EINIT or SRVWDT instruction.

Sauli