Timing interrupts

Also you are clearing t every cycle.... Move t=0 to the upper half of the if else statement.

In fact do this

The attached program works on the simulator, also works on the bench with a flashing LED.

I got a bit mixed up with different TMRs etc Those PIC PDFs are complicated aren't they. I can't think how to memorise all the options!

Thanks for all of your patience and help.

Camerart.