Hi,
With a resolver emulator at a fixed angle (45 degree), using the SGEN module to generate the excitation signal (10 KHz). Found that a phase shift after the DSPSS processing between the SIN & COS feedback signals from the emulator. Why there is a phase shift between the signal after DSPSS processing when the parameters for the 2 signals are the same?
Captured waves on SDADC input via oscilloscope:
Waves restored from the DSPSS outputs:
Best regards,
Hornby
Hi,
For the issue, 2 points need to be checked:
1. The observation method might not be correct. The way to copy the 2 signals cannot make sure the signals are in the same period.
Please use the following command in the LTB tool to monitor the signals.
B::Data.DRAW.%Decimal.Word.DEFault 0x406e8800—0x406e883f 0x406e9800—0x406e983f
2. The initialization flow of the SDADC and DSPSS needs to be noticed. The DSP module should be ready before the SDADC starts to work.
The picture shows the mentioned signals tested on our side. For your reference.
BRs,
Vincent
