Locked Nucleo L053R8?

joe2399 · ‎2015-08-22

Posted on August 22, 2015 at 16:10

I was developing a system on the Nucleo board. I then moved it to a custom proto PCB which I was programming from the Nucleo on-board ST Link. Everything was great up to that point.

When I reverted back to use the Nucleo on its own, I now get the error in EWARM: ''Do you want to perform a mass erase to unlock the device?''. Choices are OK or Cancel. Cancel obviously does nothing, and OK gives me a Busy window where it says it's flashing the program memory. Then it just sits there indefinitely with the bi-color LED blinking at me.

The jumpers for the ST Link are on, and I have changed nothing on the Nucleo board. I pulled the jumpers and programmed the standalone board, and that still works. Does anyone have any ideas? Possibly ESD damage to the main part of the Nucleo board?

Joe

raptorhal2 · ‎2015-08-22

Posted on August 23, 2015 at 02:02

Try the Reset pushbutton.

Presumably you disconnected the custom board before attempting to program the Nucleo.

Cheers, Hal

joe2399 · ‎2015-08-23

Posted on August 23, 2015 at 16:54

Yes, I disconnected the other board and it is a stand-alone Nucleo now, with the ST-Link jumpers reinstalled. I have tried computer restarts, restarting IAR, unplugging/plugging it back in etc. It just will not program now.

I was just wondering if someone else had the same issue and found some strange workaround. I'm thinking I must have zapped it somehow. I'm just going to order a new Nucleo board at the whopping financial setback of $10. :)