MPC5xxx中的主题 Re: CMU Fault injection MPC5744P

CMU Fault injection MPC5744P

Mennazz — Thu, 20 Feb 2025 09:27:15 GMT

I'm attempting to inject a fault into the CMU by setting the HFREFR and LFREFR register values to wrong values, however the CMU_ISR value is always zero.

Re: CMU Fault injection MPC5744P

petervlna — Fri, 21 Feb 2025 08:02:27 GMT

Hello,

It is hard to comment from such little information.

the ISR bit is set by HW on following event. So I guess your SW doesn't no meet it.

Best regards,

Peter

Re: CMU Fault injection MPC5744P

Mennazz — Mon, 24 Feb 2025 09:08:11 GMT

Hello, Peter.
The ISR is triggered successfully for CMU_1 and CMU_2. I used the same approach for CMU3 and CMU_0, but it didn't work.
Let me explain more.
CMU_0 desired frequency is

so I set the HFREFR to 0x1a0 and the LFREFR to 60 to trigger the ISR but it didn't work

Re: CMU Fault injection MPC5744P

petervlna — Wed, 26 Feb 2025 07:28:59 GMT

Hello,

Hard to say. But , could you confirm your ADC / PWMs are running?

Both are cumming from AUX0

Best regards,

Peter

Re: CMU Fault injection MPC5744P

Mennazz — Wed, 05 Mar 2025 13:25:01 GMT

Yes they are both running

Re: CMU Fault injection MPC5744P

petervlna — Thu, 06 Mar 2025 08:54:59 GMT

Hello,

Hmm so you still see CMU ISR not set

Only thing which can prevent set up of flag is the monitor is not enabled.

I am bit confused of this whole thing as it is strait forward.

Best regards,

Peter

Re: CMU Fault injection MPC5744P

Mennazz — Thu, 06 Mar 2025 22:22:14 GMT

Are there any specific configurations for ADC and PWM for it to inject a fault in CMU0 and CMU3?
knowing that I am setting:

CMU_3_CSR to 0x1
CMU_3_HFREFR to 0x50
CMU_3_LFREFR to 0x30
CMU_0_CSR to 0x800301
CMU0_HFREFR to 0xa0
CMU_0_LFREFR to 0x60

Re: CMU Fault injection MPC5744P

petervlna — Tue, 11 Mar 2025 11:25:21 GMT

Hello,

I have got this example from application team, which is demonstrating ADC CMU.

You can give it a try,

Best regards,

Peter