View Single Post
  #11   Spotlight this post!  
Unread 19-02-2010, 11:35
Mike Copioli's Avatar
Mike Copioli Mike Copioli is offline
You make it pretty We make it dance
no team (Retired(3539, 217))
Team Role: Engineer
 
Join Date: Jan 2006
Rookie Year: 2001
Location: Romeo
Posts: 453
Mike Copioli has a reputation beyond reputeMike Copioli has a reputation beyond reputeMike Copioli has a reputation beyond reputeMike Copioli has a reputation beyond reputeMike Copioli has a reputation beyond reputeMike Copioli has a reputation beyond reputeMike Copioli has a reputation beyond reputeMike Copioli has a reputation beyond reputeMike Copioli has a reputation beyond reputeMike Copioli has a reputation beyond reputeMike Copioli has a reputation beyond repute
Re: Bricked black Jaguar after bad firmware update

I think you will find the boot loader is still present as we have discovered on all of the "bricked" Jaguars that we have seen. It is in fact most likely just stuck in boot loader. Now this does not mean there is not a bug in the boot loader that is causing this behavior. This could be the result of some race condition or problem with the CAN layer of the boot loader. I have removed power in the middle of a re-flash several times without ever "bricking" a Jag. If your interpretation of the boot loader is correct this would definitely brick the Jag but it does not. Why do you think the block of RAM that the Bootloader is stored in is not protected? Is it because of the prompt in the bdc comm utility? The BDC comm could be giving you this warning because it is about to overwrite the boot loader. If this is the case a power cycle while updating the boot loader will absolutely brick the Jag. BTW "protection" simply means that the application cannot overwrite the block that the boot loader is contained in. It is still possible to access this block of memory from the boot loader its self.
__________________
Mike Copioli
CTRE Hardware Engineer
http://www.ctr-electronics.com

Team 3539 The Byting Bull Dogs
2013 Michigan State Champions
Team 217 The Thunder Chickens
2006 World Champions
2008 World Champions
2009 Michigan State Champions

Last edited by Mike Copioli : 19-02-2010 at 11:52.
Reply With Quote