Dear Friends,
In this system I am also using Timer 1 and timer 0 both in interrupt mode. Timer 1 is in 8 bit autoreload mode ticking every 75machine cycles I use it as a system timer for timing in several functions. Timer 0 is in 16 bit mode and is used for timing at only one function its interrupt is enabled and disabled in that function. Timer 2 is also used by the same function it is also activated and deactivated within this function.

I tried disabling the global interrupts by EA=0 when entering the ISR for timer 2 and enabling while leaving but this too has not been of any use.

All the experiments and observations simply suggest that something is wrong with the do while loop discussed in previous post. The moment I comment it out it starts working very well but when I use it it simply refuses.

Regards,
Prahlad Purohit