NRF52832 adafruit feather - flash error (ESB low-power example)

[Ivan]

Hello.
I 've got such problem with flashing some of the ESB protocol examples of NRF5 SDK.
I use Adafruit Feather NRF52832 board with ST-LINK V2 debugger.
https://www.adafruit.com/product/3406
I work in Keil 5 IDE.

When Ii try to load some of BLE examples (Periph Blinky, etc.), everything is ok. First I flash the Sortdevice and than directly an example.
App works no problem.

But when I try to flash ESB examples (like ESB low power prx) I've got such error.

I use default flash algorithm in debug settings.
But once when I change smth I got it flashing, but than I again try to flash SoftDevice and BLE and after that again can't flash ESB...


Any ideas what am I doing wrong?

All my best.
Ivan.

[Jared]

Hi,

Did you remember to erase the chip before you programmed the example? 

Use this nrfjprog command before you try to program it:

nrfjprog -e

Best regards

Jared 

[awneil]

nrfjprog isn't going to work with an ST-Link - is it ?

[Ivan]

So flash erase via Keil doesn't seems to be correct?

[awneil]

again, have you tried with the ST-Link Utility - to rule Keil out of the issue?

[Ivan]

st-link utility gives an error to flash.
But directly via Keil I can flash Soft Device and BLE examples no problem.
Once I was lucky to flash ESB example, maybe that was correct erase of the chip.

[Jared]

Whoops! I read this one a bit too quick and missed the part about the ST-LINK. As awneil has already suggested, I would recommend using a debugger that is supported by us. I think the source of your issue is that a proper erase isn't performed before you try to reprogram the device. 

best regards

Jared