Adapting the blinky example from the nRF52840 DK to the nRF52840 dongle

RE: Adapting the blinky example from the nRF52840 DK to the nRF52840 dongle

awneil — Fri, 15 Feb 2019 16:01:55 GMT

[quote userid="77347" url="~/f/nordic-q-a/43760/adapting-the-blinky-example-from-the-nrf52840-dk-to-the-nrf52840-dongle/171455"]We have to undefine BOARD_PLA10056 explicitly on the project options[/quote]

Yes, you do!

RE: Adapting the blinky example from the nRF52840 DK to the nRF52840 dongle

rmarques — Fri, 15 Feb 2019 15:55:59 GMT

Found the problem!

We have to undefine BOARD_PLA10056 explicitly on the project options. There's a field for that on the interface on Code\Preprocessor\Preprocessor Undefinitions or you can add the line directly on the emProject file:

c_preprocessor_undefinitions="BOARD_PCA10056"

This way the blink example for the DK can work on the Dongle!

RE: Adapting the blinky example from the nRF52840 DK to the nRF52840 dongle

awneil — Fri, 15 Feb 2019 15:45:11 GMT

[quote userid="77347" url="~/f/nordic-q-a/43760/adapting-the-blinky-example-from-the-nrf52840-dk-to-the-nrf52840-dongle/171444"]I suspect that somehow the LEDs are not mapped correctly when switching board definitions in the c_preprocessor_definitions of the PLA10056 projec[/quote]

Yes - Sounds like it.

It seemed to be that SES doesn't necessarily spot project changes - try restarting SES, then doing a full rebuild ... ?

RE: Adapting the blinky example from the nRF52840 DK to the nRF52840 dongle

rmarques — Fri, 15 Feb 2019 15:23:04 GMT

So, I've successfully connected a J-Link pro debugger to the dongle, programmed it with the blink project example intended for this board and was able to add a breakpoint and stop/go over it normally.

When I made the modifications to the blink project for the PLA10056 that were recommended in the guide, the board was also programmed successfully and I could debug it normally, but the LEDs didn't light up as they should, instead they were turned off always.

I put a breakpoint in the line that switched the LEDs on and off inside the for loop and that breakpoint was reached consecutively as expected. So now I suspect that somehow the LEDs are not mapped correctly when switching board definitions in the c_preprocessor_definitions of the PLA10056 project.

Ideas?

RE: Adapting the blinky example from the nRF52840 DK to the nRF52840 dongle

awneil — Fri, 15 Feb 2019 11:37:36 GMT

Yes, you certainly should learn to use the debugger - it should be considered an indispensable part of your tool kit!

https://www.avrfreaks.net/comment/1138166#comment-1138166

You're right about the SoftDevice.

RE: Adapting the blinky example from the nRF52840 DK to the nRF52840 dongle

rmarques — Fri, 15 Feb 2019 11:30:47 GMT

I only used the debugger to program the Dongle, I may learn about it in the meantime.

I did a full erase yesterday by accident and had to use a JLink-Pro to reflash the Dongle, since the full erase resets the REGOUT0 register, which makes the logic level and VDD 1.8V.

The Blinky example doesn't need a SoftDevice as far as I can tell from the link above (here for convenience). The BLE examples need it, yes, but I am not using them for now.

RE: Adapting the blinky example from the nRF52840 DK to the nRF52840 dongle

awneil — Fri, 15 Feb 2019 11:22:58 GMT

If you've got the debugger connected, did you use it to see what's happening?

Did you do a full chip erase before programming, and remember to reprogram the SoftDevice?

Because it doesn't come with the on-board JLink, the Dongle has a bootloader - so your code needs to work with that ...

RE: Adapting the blinky example from the nRF52840 DK to the nRF52840 dongle

rmarques — Fri, 15 Feb 2019 11:03:40 GMT

I tried programming it with a nRF52840 DK, connected to the board via Debug Out and, in another try, I used the nRFConnect Programmer via USB. Does that answer the question? The blinky example project for PCA10059 works on the dongle.

RE: Adapting the blinky example from the nRF52840 DK to the nRF52840 dongle

awneil — Fri, 15 Feb 2019 10:59:18 GMT

The nRF52840 chip on the DK and the Dongle is identical; it neither knows nor cares what board it is mounted on - therefore, the same code will run identically on the two.

The difference is in the external hardware - so anything that relies upon the external hardware on the DK which is not on the dongle will not work.

One key hardware element which is present on the DK but not the Dongle is the J-Link programming & debugging interface.

So how have you programmed the dongle?