nrfjprog -e does not erase nRF9160

[Jared]

I'm currently running nrfjprog version on OSX. Version info below:

nrfjprog --version
nrfjprog version: 10.9.0 
JLinkARM.dll version: 6.70b

When running a nrfjprog -e I expect that the device doesn't do anything afterwards. When monitoring the serial output I still see that the code that was last run is still running despite running nrfjprog -e. I'm using a nRF9160DK to program an external nRF9160 Feather board.

[JONATHAN LL]

Hi Jared,

I have had more success using the following routine:
nrfjprog -r
nrfjprog -e

and do a hard reset on both devices. 

make sure that the 9160DK is not he one targeted. Load a application on the nrf9160Dk that has a blinking led or something  that you can easily see is running on the device. Then when you run the nrfjprog -e you will quickly see that which device is being erased, if it is the DK or the Feather board.

Latest version of JLinkARM is 6.84 I think so maybe consider updating.

Regards,
Jonathan

[Jared]

Hey Jonathan

Thanks or the answer. I actually jumped SB32 on the DK, so there never should be a case when the on-board device is being erased. 

Curiously, the erase command in the nRF Desktop Programmer App *does* erase the device. So I'm  not sure what the difference is between the CLI and the GUI are but there's something!

Thanks

Jared

[JONATHAN LL]

Hi Jared,

I am unsure what you meant by SB32. https://infocenter.nordicsemi.com/topic/ug_nrf91_dk/UG/nrf91_DK/solder_bridge_configuration.html
What version of the DK are you using?

The programmer is open source and it uses nrfjprog if you want to take a look at how the GUI is built, and version 1.4.5 was released today and should be available.

if you do a nrfjprog -e and then connect the device to Programmer app and read the memory from the Feather device does it sow empty or show some partitions whit a application?  

I currently do not have a Feather device so cant test this now, but if it is as you say I will see if I can get a hold of one and test it myself. 

Regards,
Jonathan

[Jared]

JONATHAN LL said:

I am unsure what you meant by SB32. https://infocenter.nordicsemi.com/topic/ug_nrf91_dk/UG/nrf91_DK/solder_bridge_configuration.html
What version of the DK are you using?

Ahh I misread it. It's SB37. I'm using 0.9.0.

JONATHAN LL said:

if you do a nrfjprog -e and then connect the device to Programmer app and read the memory from the Feather device does it sow empty or show some partitions whit a application?  

I'll give it a shot and get back to you on this.

JONATHAN LL said:

I currently do not have a Feather device so cant test this now, but if it is as you say I will see if I can get a hold of one and test it myself. 

Production is underway. I should have a handful if it comes to this. Here are all the files related to the design. Not much going on in there that could affect this (IMHO): docs.jaredwolff.com/nrf9160-downloads.html

[Jared]

After some more playing, It seems to happen in a very certain instance during LWM2M bootstrapping. Only after being bootstrapped does it seem to fail to erase using the CLI. I'll try to figure out some type of reproducible test case.