timer1 setup!!

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

My first comment is that you have way too much code to test this problem.
Notice how small my program is. Smaller is better, when investigating
a problem.

The following program works OK on the PicDem2-Plus board.
It blinks LED "RB0" at a rate of 2 seconds on, and then 2 seconds off.
This is correct, because with a 32.768 KHz crystal, it will take 2 seconds
to make Timer1 count from 0x0000 to 0xFFFF and then overflow to
0x0000 to create the interrupt.

Also make sure that you have jumper J6 installed. This jumper
enables the LEDs.

Agios · Joined: 28 Jan 2006 Posts: 8 Location: Brighton

Thank you PCM programmer for your reply. From what you have written in the post I realized that my formula should be modified for the TIMER 1 with the external 32768KHz clock attached. The delay calculation formula will therefore be: Delay = [65536(2 to the power of 16) * 1 (instruction cycle) * 1 (prescaler) ] / 32768. Now it makes sense. Thank you all for your help.

Regards

Agios