I have a nrf52840 DK. Is it possible to use the Pin 19 on my development kit to program a nrf52832 that will go on a custom PCB?

[joannas]

I've been trying to use the Adafruit nRF52 library (github.com/.../Adafruit_nRF52_Arduino) and the Arduino IDE to program a nrf52832 using my nrf52840 DK. However, I keep getting 'serial.serialutil.SerialException: Attempting to use a port that is not open
Possible causes:
- Selected Bootloader version does not match the one on Bluefruit device.
Please upgrade the Bootloader or select correct version in Tools->Bootloader.
- Baud rate must be 115200, Flow control must be off.
- Target is not in DFU mode. Ground DFU pin and RESET and release both to enter DFU mode.'

I'm wondering if this is a result of incompatible soft devices but can't find any documentation on the development kit that says whether or not this is the case. 

[Øyvind]

Hello,

Nordic does not provide any official support for Arduino. You will have to check this directly with the developers of the 3rd party developers. As the Adafruit nRF52 library is made by Adafruit, you will have direct your support questions to the Adafruit forum.

We suggest using the official SDK for our development kit along with Segger Embedded Studio which is free for people programming on Nordic devices. The SDK includes several example projects that work out of the box for our development kit.

Kind regards,
Oeyvind

[joannas]

Hi Oeyvind,

I'm sorry I forgot to mention, I also tried this with SEGGER using the Blinky project from the SDK for the S132, but it kept programming only my DK instead of the nrf52832 that I connected on pin 19. Is there anything I need to select on SEGGER to make sure it goes to my target device?

Best,

Joanna

[Øyvind]

Hi Joanna, 

Have a look at similar cases here and here.

In the DK documentation, as awneil mentions, you can find more information on how to program and debug external boards. In the nRF52840-DK HW files (bottom of page) you'll find the schematics for the board, showing the pinout for P19 and P20. The file you are looking for is: PCA10056_Schematic_And_PCB.pdf

Kind regards,
Oeyvind

[awneil]

joannas said:

pin 19

It's not just a pin; it is a connector - it has 10 pins !

As Øyvind says, the pinout of this connector is given in the DK User Guide.

[joannas]

Sorry meant P19. I currently have a connector that when plugged into my external NRF connects VDD-> VTG, IO->SWDIO, CLK-SWDCLK, GND-> GND. However when I run nrfjprog -i to see if the system is correctly trying to program my external board, I continue to just get the serial number of my DK. To make sure it wasn't the connector,  I also broke out my system and connected everything to P20 but still had the same results. If I'm correctly applying 3 Volts to the VDD pin, what else could be the problem here? 

[Øyvind]

1. Can you please copy the output of the terminal/command prompt you are using? 
2. What kind of file are you trying to program?
3. Can you also include a picture of the setup you have?

Thanks!

-Øyvind

[awneil]

It's far clearer to present this information as a schematic rather than trying to do it in words!

Note that the nRF52840 DK does not supply power to the external target.

As Øyvind says, a good, clear, in-focus picture (photograph) would also be helpful.

Øyvind said:

copy the output of the terminal/command prompt

Probably best to post it as for source code - but keep the language as 'Text' (not 'C'):