MCU BootloaderのトピックRe: MPC5746 software functional reset

MPC5746 software functional reset

rudrappa_jangam — Tue, 25 Aug 2020 10:07:22 GMT

Hi ,

I am trying to create the Software Functional reset in MPC5746C , but i am getting debug port fail from Lauterbach , looks like debugger is loosing connection due to some reason.

While performing the reset i perform the below instruction

ME_MCTL = (uint32)(( ((uint32)0x0) << 28 ) | 0x00005AF0UL);
ME_MCTL = (uint32)(( ((uint32)0x0) << 28 ) | 0x0000A50F ); (After executing this line i get lauterbach debug port fail)

Can you tell me what could be the cause ?

I am using the Lauterbach Script provided NXP for MPC5746c

Re: MPC5746 software functional reset

davidtosenovjan — Wed, 26 Aug 2020 07:34:32 GMT

Hi, is the loosing of debug connection the only issue?

I mean whether the code is executed properly after SW reset. You could try to blink LED or print notices to the terminal window to check it.

Re: MPC5746 software functional reset

rudrappa_jangam — Wed, 26 Aug 2020 09:28:11 GMT

Hi David ,

The problem is similar to the problem described in the thread MPC5748G, Lauterbach multiple-reset causes error .

only difference is its happening right after first reset not after 15 resets as described in https://community.nxp.com/thread/355534 .

I tried the solution provided but could not solve it .

thank you

With regards

Rudrappa

Re: MPC5746 software functional reset

davidtosenovjan — Fri, 28 Aug 2020 12:49:32 GMT

Yes, that's why I am asking for the question above. To know whether you are facing reset escalation or just some issue with the debug probe. However I often debug over reset with Lauterbach TRACE32, it should work.