rtel wrote on Saturday, February 11, 2012:
I have confidence in the timer implementation, as it is extremely thoroughly tested, so it still sounds like an application issue. Have you stepped through the code in the debugger to see exactly what it is doing - for example, the result of the calculations that determine the frequencies (checking for over flows, etc.). Have you checked that the functions are returning values indicating that they have passed? Have you checked that your system clock is clocking the chip at the frequency you think it is and that the tick frequency is therefore the frequency you think it is?
Regards.