I can see how, after thousands of posts here by people working with serial input/output and timer interrupts for the first time, that it is easy to anticipate the next question that may come from Pawan Deep Narula. I however have read his post a number of times and he seems to be having a problem with his timer implementation and not his serial I/O process. In fact he says that it was already working with the software delay loops. Seeing the issue that he raised with the "dual attempted use of TH1 and TL1" tells me that the first thing for him to work out is the timer issue. Later if he has UART issues I am sure he would ask for more information.

And then consider that it is summer, no finer time to take a peaceful walk up the garden path!! We should all either wish for that luxury or force ourselves to take it. (Summer here at least for the folks in the northern hemisphere).

Michael Karas