Forums / ARM Development / prescale counter for LPC2378 - Rickey's World of Microcontrollers & Microprocessors

Discussion in "ARM Development" started by bonois_dailleurs May 19, 2011.

bonois_dailleurs

[ Fresher ]

Thu May 19 2011, 01:39 pm

hello ,

can someone give me an exemple for using TOPC and TOPR for clock configuration , in LPC2378 device

ajay_bhargav

Site Owner

Thu May 19 2011, 08:23 pm

I have not heard of anything like TOPC or TOPR in LPC23xx series. are you sure you know what you're asking??

ExperimenterUK

Co-Administrator

Thu May 19 2011, 10:27 pm

I found T0PC and T0PR for the LPC21xx and LPC32xx series, but not the PC2378

[ Edited Thu May 19 2011, 10:28 pm ]

ajay_bhargav

Site Owner

Sun May 22 2011, 01:28 pm

oww... he has written it as TOPC and TOPR

well regarding these regsiters:

TxTC = Timer counter
TxPC = prescalar counter
TxPR = prescalar register
where x is 0/1/2/3.

TxTC is the actual timer register which gets incremented at every timer clock. In LPC23xx prescalar work like this. you set a value which you want on your TxPR regsiter. At every timer clock instead of incrementing TxTC, TxPC is incremented first. when TxPC becomes equal to TxPR, TxPC becomes 0 and TxTC gets incremented by 1. so thats how prescalar works in LPC.

Hope you understand now. I suggest you to go through user manual and if you dont understand from manual then you ask question.