Lock Bits won't unlock

Discussion around product based on ARM Cortex M3 core.

Moderators: nferre, ncollot

johnf
Posts: 4
Joined: Sun Nov 16, 2014 10:01 pm

Lock Bits won't unlock

Sun Nov 16, 2014 11:42 pm

I'm using an ATSAM3X8E on my board.  I downloaded a file and it some how set a lock bit, so now I'm locked out.  I can't load another file because I get an erase failure "Lock error".  Using Atmel Studio 6.2, and Atmel ICE, I can see LOCK_REGION_16 is set.  I have a push button to provide a high on erase but it fails to unlock the bit.

This happened on two boards so I'm looking for an answer as to why this is happening, before moving forward.

Any ideas about how to get the bit to unlock?

Thanks,
-j
johnf
Posts: 4
Joined: Sun Nov 16, 2014 10:01 pm

Re: Lock Bits won't unlock

Tue Apr 21, 2015 6:58 pm

Working with our local FAE, we determined the Atmel ICE I was using was corrupting the processors on the boards.  I'm now using an AT91SAM-ICE and all has been stable.

To fix the boards I had to replace the processors.

How I was able to kill the processor using the Atmel ICE is still a mystery.  My Atmel ICE is at the bottom of my drawer waiting for firmware update to fix it.

-j

Return to “SAM3 Cortex-M3 MCU”

Who is online

Users browsing this forum: No registered users and 3 guests