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Unread 04-06-2010, 06:07 AM
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Re: Unexpected results from Encoder::GetRate()

Originally Posted by vamfun View Post
We integrated dt = 1/(Update_Rate) and checked that the computed time matched real time so this led us to the double encoder GetRate() error which we verified independently using motor rpm measurements.
But what is Update_Rate? If it's derived from the period of some periodic loop, you need to verify the real interval of the periodic loop. How did you compute real time? I use the following code to measure my periodic intervals:
UINT32 timeCurr = GetFPGATime(); // in usec
float period = (float)(timeCurr - m_timestamp)/1000000.0;
m_timestamp = timeCurr;
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