I understand that timeout period determines the period of your interrupt.I also understand that periodL and periodH is holds the LSB and MSB 16bit value of the period register. My question is how do i know what value to put into these registers to change my timeout period?
period register = timeout period x timer frequencyFor example if your timer runs at 50Mhz and you need a 50ms period, you must write the period register 0.05 x 50M = 2500000. 2500000 dec = 2625a0 hex : then periodH = 0x26 and periodL = 0x25a0.
It seems strange to me that Altera haven't supplied 32bit versions of the timer devices. I presume the 16bit versions have been carried forwards from an earlier design - It isn't as though a 32bit version would be difficult to write from scratch!It is worth checking that you don't need to subtract 1 from the count - check the datasheet/pdf.