Flashing custom board with nrf52840 chip using the nrf52840dk

[MurielleH]

Hello

I designed a custom board and now I have to put the code in the nrf52840 module (from raytac). I have been using the nrf52840dk to write my code and now I want to use the board to flash the other one. 

 

This is how I attached my IO pins. The power part is a different page in the desing. 

I did notice in many explanations that it said to also connect to detect ground on the dk, but I cannot find that pin.

Can someone help me please? I asked my teacher and he said something about toggling a pin or something, but he was not very specific.

Thanks in advance!

[frogrammer]

Combine/Short nRF_VDD + VTG and connect to your custom board VDD 

SWDIO to SWDIO

SWDCLK to SWDCLK

SWO to SWO

GND to GND

after this when you open VS Code, under the connected device you will see your DK s Serial number and your custom chips being visible. 

[ To diasable DKs own nRF52840 chip, VTG and nRF_VDD has to be shorted together this enables external chip to be sensed and programmed through SWD. ]

This is the way to do in nRF5340DK. so give it a try, should be same. 

[MurielleH]

Is the SWO necessary? I saw other plans and they didn't use that one, so I never connected it to my connector. And I cannot access the swo pin because it is beneath the module.

[frogrammer]

Its optional. what you have connected is all you need.