Using the NRF51-DK as external programmer

RE: Using the NRF51-DK as external programmer

Luiz Duarte — Sun, 31 Mar 2019 18:51:07 GMT

Hi, I'm with the same problem, but the JLINK firmware link that you pass is no longer available. Can you halp me?

RE: Using the NRF51-DK as external programmer

Anders Strand — Fri, 27 Nov 2015 15:31:52 GMT

You can buy a cheap CMSIS-DAP debugger, for example this one from adafruit. It should work with pyOCD

RE: Using the NRF51-DK as external programmer

Prashant @ TobyRich — Fri, 27 Nov 2015 15:14:05 GMT

Thank you for the confirmation. I'm using JLINK firmware for now.

Background: I am using pyOCD to flash the firmware while preserving unchanged flash blocks because copy-pasting erases the entire flash (in both mbed and Jlink modes). My app stores some calibration data on flash using pstorage, so I must preserve it. pyOCD only works for mbed-enabled boards. I cannot use Jlink because we develop on Mac and Segger tools are unreliable.

I am not using MBED online IDE at all, we do offline development.

RE: Using the NRF51-DK as external programmer

Anders Strand — Fri, 27 Nov 2015 14:48:45 GMT

I updated my previous answer.

RE: Using the NRF51-DK as external programmer

Prashant @ TobyRich — Fri, 27 Nov 2015 11:12:49 GMT

I am also interested in learning the answer to this. It seems the nRF51822-DK will not program an external board if the MBED firmware is loaded on it. Can you confirm?

RE: Using the NRF51-DK as external programmer

Patrick — Tue, 24 Nov 2015 15:06:28 GMT

So, It is not possible to use the mBed Firmware to flash an external device?

On the old devout (NRF51822 green Board) I cut the traces and put my device as "man in the middle" to program it.

RE: Using the NRF51-DK as external programmer

Anders Strand — Tue, 24 Nov 2015 15:04:28 GMT

Hi.

When you flash the mBed firmware to the segger, the board will no longer work as a JLINK programmer. You must flash the JLINK firmware first, which replaces the mBed firmware. You do this by holding down the RESET button while powering on the board. It should mount on your computer as "BOOTLOADER". Drag and drop the JLINK firmware on the BOOTLOADER drive. Wait a couple of seconds, and then power cycle the board.

EDIT: The debug out port does NOT work when mBed firmware is loaded. The mBEd firmware does not check for external devices, it only flashes the hex file to the on board nRF chip.

You must use the JLINK firmware for this. Even though JLINK firmware is loaded, you can flash hex-files generated from the mBed online compiler to the external card.