I use MCBTR9 Board, the serial interface works in the ordinary system, but if the system is integrated with task(RTX), then it does not work. could you please advise me, what i do.
Have you tried the 'U' test by continuously transmitting a 'U' and scoping for a correct waveform?
When I did the same thing as you, it gave me the opportunity to better understand the clock options in STR912. There are a lot of setting that need to be right. I found I was transitting 'U' but at the wrong speed!
I found that the simulator was particularly good for this to check the baud and other values.
Whoops - Tamir is a faster typist than me!
why do you think Ms. embedded likes me so much ;-) where are you girl!