Hi Nitish,
[quote user="Nitish Gautam"]1. Semaphore 'count' doesnot seem to increment at all. Can you please let me know what's wrong am i doing here ?[/quote]
Do you see your LEDs toggling? In your setup, the count won't increment. A Semaphore_pend() will block when count == 0.
See this wiki page: http://processors.wiki.ti.com/index.php/SYS/BIOS_Training:_Semaphores
[quote user="Nitish Gautam"]2. can I use multiple semaphores for multiple tasks?[/quote]
Yes.