Unable to halt core MAC7116

[darkleo]

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?

[dayve]

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

[darkleo]

Hi

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.

[darkleo]

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....

[aj_xx]

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....

[dayve]

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