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CCS/TMS320F28335: TMDSRSLVR how to use dither feature

Part Number: TMS320F28335

Tool/software: Code Composer Studio


I observed the ePWM output (GPIO3) labelled as Dither but it essentially GND (0V)

I have read the document in TMDSRSLVR and resolver library V101, it explains very little about the dither feature. 

Can you explain why dither is not doing anything and what to expects? I do have working PWM in sinewave fashion and optimise ADC12 to suit BLDC motor application. 

How does dithering work inside ePWM, I type the work dither in SPRUG04A, nothing came up. 

It is not yet connected to resolver (it on order at present),