56800E - Fractional cos problem

admin · ‎08-31-2006

I use "tfr16CosPIx" function from CW for 56800E. There is problem when i try to calculate cos of falues near zero. Result of fuction jump from -1 to 1 some times when input values changed from -20 ... +20 (approx.).

Anybody can help me?

Message Edited by Alban on 2006-08-31 05:53 PM

admin · ‎10-30-2006

I found that the problem is in the saturation. CPU's property "Saturation mode" doesn't help. I use this function together with svmStd function (from SpaceVectorMod bean) where saturation off - SA bit of OMR register is cleared. So if you have the same problem set this bit manually.

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admin · ‎10-30-2006

I found that the problem is in the saturation. CPU's property "Saturation mode" doesn't help. I use this function together with svmStd function (from SpaceVectorMod bean) where saturation off - SA bit of OMR register is cleared. So if you have the same problem set this bit manually.