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TMS320F28035: Resolver solution base on Controlsuite\TMDSRSLVR_v1.0

Part Number: TMS320F28035
Other Parts Discussed in Thread: CONTROLSUITE

My customer is evaluating C2000 SW Resolver solution, firmware from controlSUITE\development_kits\TMDSRSLVR_v1.0, hardware is .

We get the waveform from angleRaw variable (raw angle estimate from arctan) as below, seems it run correct.

However the waveform from angleOut variable (finial angle estimate after FIR delay compensation) looks strange as below. What maybe the root cause and how we should solve it?