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FreeRTOS Support ArchiveThe FreeRTOS support forum is used to obtain active support directly from Real Time Engineers Ltd. In return for using our top quality software and services for free, we request you play fair and do your bit to help others too! Sign up to receive notifications of new support topics then help where you can.
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Accurate timing measurement in freeRTOS?Posted by Nobody/Anonymous on December 11, 2006 Hi everybody, as being a bit unexpirienced in freeRTOS architecture i need some help. I am using AT91SAM7x ARM processor along with IAR. I've read documentation availavle on www.freertos.org i some questions appears: Whitch is the best way to measure timing in freeRTOS, but down to microseconds. Is there any utility function like (QueryPerformance in Windows) that will return value of some high res timer? It is the fact that any ARM timer could be used for this purpose, but the question was whether such possibility is already implemented in freeRTOS. RE: Accurate timing measurement in freeRTOS?Posted by Nobody/Anonymous on December 11, 2006 FreeRTOS will only be able to measure time down to the frequency of the tick interrupt and you don't want this to be in the us range. You can configure any time you like (other than the one used by the tick) to obtain timing information. RE: Accurate timing measurement in freeRTOS?Posted by Nobody/Anonymous on December 11, 2006 Thanks, as i expected. Guess i should initialise some of unused timers and wrap a simple function like long GetTimerValue(void).
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