Support for Embedded Development Tools, Processors (SoCs and Nios® V/II processor), Embedded Development Suites (EDSs), Boot and Configuration, Operating Systems, C and C++
Success! Subscription added.
Success! Subscription removed.
Sorry, you must verify to complete this action. Please click the verification link in your email. You may re-send via your
profile.
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 frequency
For 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.
