topic Re: Unable to halt core MAC7116 in Other NXP Products

Unable to halt core MAC7116

darkleo — Fri, 06 Aug 2010 03:29:02 GMT

Hi

I'm working on programm for this chip.

After i'm programmed last version of flash in to the chip, my j-link can't connect with him and showing me a message "Unable to halt core"

I'm think that i made mistake in code......

How i can halt core?

Re: Unable to halt core MAC7116

dayve — Fri, 06 Aug 2010 16:02:11 GMT

Hey!

It sounds like you have secured the device by overwriting the flash security bits when you have programmed the flash.

There is a JTAG unsecure mechanism to get the device back in a usable state. This script should be available from your tools vendor.

Regards,

Dayve

Re: Unable to halt core MAC7116

darkleo — Fri, 06 Aug 2010 22:18:07 GMT

Hi

Thanks for answer

I'm know about secure bits... Device guaranted is not secured....

I'm modified the flash memory... and restart the chip...

To make JTAG Lockout recovery i need to be connected to chip! but i can't becouse 'Unable to halt core'

Chip maked illegal instruction or call for out of memory....

Re: Unable to halt core MAC7116

dayve — Tue, 10 Aug 2010 20:56:27 GMT

Are you able to put the MCU into serial boot mode and see if it will enter debug in this mode?

Re: Unable to halt core MAC7116

aj_xx — Tue, 17 Aug 2010 04:00:39 GMT

I am making code also for mac.

At the beginning I had same problem "Unable to halt arm core..." with J-Link.

"Device guaranted is not secured...."

When my processor were stuck, I didn't do anything to secure processor.

I think problem was related to my code... ?

My way to solve the problem was replace the microcontroller. (at the beginning I did it three times)

Somebody may have better solution but I didn't find it....

When I got interrupts and flash writing working, I haven't had this problem any more....

Re: Unable to halt core MAC7116

darkleo — Mon, 22 Nov 2010 03:36:20 GMT

Can you help me find the lockout recovery script for mac71xx?

I want to know how i can unsecure chip...

Iread datasheets and understand that i need to make some operaton duing reset to unsecure chip...

May be you can show me script?

Thnak you.