AnsweredAssumed Answered

Kinetis K60 FTFL Erase Block

Question asked by James Elliot on Jul 23, 2015
Latest reply on Jul 26, 2015 by Hui_Ma

Hi

 

I have a product that includes a firmware upgrade, when running in the field the upgrade will occasionally fail (about 5% of the time), and completely brick the device. I can't see anything obviously wrong so I am going over all the code with a fine tooth comb trying to find what the problem is...

 

I found a strange issue with the erasing.

 

When trying to do a mass erase in preparation for the firmware write, for some reason when I run the erase flash block command at address 0x40000 it fails with MGSTAT0 error (i.e. verify failed), but if I erase the block sector-by-sector and manually verify then it is erased and doesn't report any errors.

 

If I then read out the memory using JTAG Commander following a block erase, the binary file shows the upper block to be correctly erased.

 

Does anybody have any idea why it is reporting a fail when it is actually working?

 

The erase all blocks command also fails with a verify error.

 

Things I have checked:

* All the flash protection registers are 0xFF

* The flash configuration is set to 0xFFFFFFFE

* Watchdog is disabled

* Interrupts are disabled

* The code is running in RAM

* fails whether or not debugger is attached

 

I'm using a K60N512VLQ10 rev 4N22D

 

Regards

 

James

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