topic Error about GDU in S12 / MagniV Microcontrollers

Error about GDU

fanlikang — Fri, 04 Nov 2022 08:40:51 GMT

The original program realizes state machine transition through on-board switches. In order not to use on-board switches, I made corresponding modifications in the program, as follows:

After the above settings, the program successfully jumps to the next state, that is stateCalib()，then , the program enters stateAlign( ).

But the problem occurred. In this program, GDU errors were found, as shown in the figure：

I want to know why and how to avoid

Best regards

Re: Error about GDU

danielmartynek — Fri, 04 Nov 2022 12:15:49 GMT

Hello @fanlikang,

Can you read the DGU registers?

Which GDU error flags do you see?

Registers GDUDSE, GDUF.

Thanks,

BR, Daniel

Re: Error about GDU

fanlikang — Sat, 05 Nov 2022 04:27:14 GMT

Glad to receive your reply.
I checked my register and found that errors were reported in both places.GDUDSE=0X20 GDUF=0X08.
Please help to deal with this problem.
Thanks

Re: Error about GDU

danielmartynek — Mon, 07 Nov 2022 11:01:11 GMT

Hi @fanlikang,

I need mention that the demo is provided "as is" and we don't support custom changed in the demo.

Anyway, the GDU detects desaturation error on LS[1].

The desaturation error detection is described in the RM, Section 18.4.5 Desaturation Error.

It also detects an overcurrent condition, which is likely caused by the desaturation error.

RM, Section 18.4.8 Current Sense Amplifier and Overcurrent Comparator.

Regards,

Daniel

Re: Error about GDU

fanlikang — Thu, 10 Nov 2022 03:20:13 GMT

Thank you for your answer. I'm trying to solve this problem according to your suggestion