[SOLVED] JLinkSTM32 - clear/erase device data

guyb · Sep 2nd 2010, 12:55pm

Hi,

i am using the JLinkSTM32.exe to clear the device, this works fine, but i need a way to activate the sequence from within my code using c#, I tried using the JLinkARMFlash.dll but with out success, can anyone advice ?

thanks.,

Guy.

SEGGER - Alex · Sep 6th 2010, 8:37am

Hi Guy,

what are you looking for?
Sample code how to perform a chip erase or a way to call the JLinkSTM32.exe from command line?
Or would either of the two options work for you?

Best regards
Alex

guyb · Sep 7th 2010, 10:11am

Alex hi,

Sample code is the best option since i am trying to run the erase in the background and the JLinkStm32 requires user interaction.

Thanks,

Guy.

SEGGER - Alex · Sep 7th 2010, 8:14pm

Hi Guy,

since the source code of the STM32 unlock tool is not open source,
I can not post it here.

But triggering a mass/chip erase on the STM32 is not that complicated.
Have a look at the Flash programming documentation of ST.

Best regards
Alex

guyb · Sep 12th 2010, 8:51am

Alex,

I am not sure what you mean by the " Flash programming documentation of ST", do documentation i am using is UM08002_JLinkArmDLL.pdf.

i tried using the "JLINKARM_FLASH_EraseChip()" but it fails every time (returns false), so i guess i need to do something diffrently. is there a guid line or a code example to erase the device, as i said currently the jlinkstm32 works fine but it needs user interaction that doesn't suit my application (the application has a full flashing cycle include user interface for hex file selection, convertion, flashing and etc and the only thing missing is the "erase" of the device at the start of the flashing process).

Thanks,

Guy.

SEGGER - Alex · Sep 13th 2010, 2:49pm

Hi Guy,

usually the EraseChip() function of the J-Link FlashDLL should work as long as the device readout protection is NOT enabled.
If the readout protection IS enabled, the flash has to be erased in a different way,
since the usual chip erase command does NOT erase the option bytes and thus has no impact on the readout protection, so it can not be used.

If NO device security is active on your STM32 device the EraseChip() function should work.
In this case we will have a look into this.

Best regards
Alex

guyb · Sep 19th 2010, 9:58am

Hi Alex,

I must assume that the device might be protected / locked, and the procedure i am doing should erase a locked device as well (knowing that all the data will be erased).

So what is the different way to do that ? how do i disable the readout protection / the option bytes ?

Guy.

Luigi.Lena · Dec 6th 2016, 6:44pm

This comment was added by mistake

SEGGER - Erik · Dec 7th 2016, 11:20am

Hi,

So what is the different way to do that ? how do i disable the readout protection / the option bytes ?

As Alex already described, the unlock sequence is described in the ST "Programming Manual" for your used device / series. The documentation can be found on the ST website. Example for the STM32F2 series: st.com/content/st_com/en/suppo…ceType=programming_manual

Best regards
Erik

Share