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 

[Ivan]

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

[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

[awneil]

Again, using (ab)using unsupported tools outside their designed scope is just complicating things.

[Ivan]

Thanx for the answers! I 'll use J-link in this case.

[Ivan]

So, finally I got it work properly with ST-LINK without any problem.

I add a 'softdevice erase flash' algo in a separate target with 'erase full chip' option, no program. And left only 'nrf52_xx' flash algo in default target with program option and no erase. 

First, you erase full chip with first target, than you program it with second. Thats all.

: )

[awneil]

Thanks for sharing.

Please verify that answer - so that people know it solves the issue