On Sun, Nov 20, 2011 at 02:34:05PM +0100, Kuba wrote:
> I am new to the list, trying to dive into the world of MSP430 and I
> already thank you for the great work around mspgcc/mspdebug. Thanks!
> After playing a bit with the original Launchpad I also purchased the
> FRAM experimenters board ( MSP-EXP430FR5739 ) mostly because it has
> lots of outputs/peripherals and onboard accellerometer, so I can
> extend my play/learntime without making boards myself.
> However, from start I got an error in programming using mspdebug
> (newest git version) that the device cannot be erased. I found
> somewhere else, that this usually ends in the device actually being
> erased but not responding. A solution was to unplug/replug the board
> to USB, load the program and run. This worked, though it is pretty
> annoying to need to replug the board.
> Any idea what causes an after-erase error?
> Worse, though, is that after a number of such programming cycles I
> received a message that the "security fuse is blown (error 30)" which
> disabled my access to the board alltogether. Problem is, I did not ask
> for fuse blow (a probably difficult JTAG procedure?) so how on earth
> could that happen?
> This all is happening under linux (mint debian edition). If I try to
> debug the board from Windows (CCS 5.1) I simply get message that the
> board is not accessible.
> Is it possible I really blew the security fuse by accident? If so, I
> guess my only option is to buy a new board, right? Any other way to
> check for that? (from CCS itself perhaps?)

Hi Kuba,

A few people have run into this problem. I'm not sure what causes it,
but it is recoverable if you access the chip via the bootstrap loader
and perform a mass erase.


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