External programming using NRF52-DK

RE: External programming using NRF52-DK

Håkon Alseth — Wed, 06 Mar 2024 09:56:53 GMT

[quote user="pashan"]I want to flash a custom board later which has nrf52832 soc. Before that I was trying to use the same connection between two nrf52dk just to make sure that method works. just to clarify, you are saying that to connect two nrf52dk, I need to use dbg out and dbg in. [/quote]

Yes, I understand, but if you are now testing the connection, you cannot connect an output to an output.

For the DK-scenario, you are correct. dbg out -> dbg in.

[quote user="pashan"]I tired to flash the custom board also It shows the same error "failed to connect to target". [/quote]

Try to run a "nrfjprog --recover" first, and if it still fails, add "--log" and share the .log file here.

Kind regards,

Håkon

RE: External programming using NRF52-DK

pashan — Wed, 06 Mar 2024 09:31:32 GMT

I want to flash a custom board later which has nrf52832 soc. Before that I was trying to use the same connection between two nrf52dk just to make sure that method works. just to clarify, you are saying that to connect two nrf52dk, I need to use dbg out and dbg in. But my custom board doesn't have any debug pins socket, only SWD interface is available. Also, I tired to flash the custom board also It shows the same error "failed to connect to target".

RE: External programming using NRF52-DK

Håkon Alseth — Wed, 06 Mar 2024 09:24:02 GMT

Hi,

[quote user=""]I am trying top program external nrf52dk through another nrf52dk via SWD interface to check if external programming method works. [/quote]

If you are connecting two nRF52-DK's together, to program then; you cannot connect SWD outputs to SWD ouputs.

You need to connect one of them to the "DEBUG IN":

The easiest way is to use a 10-pin SWD cable from the "DEBUG OUT" from one kit to the "DEBUG IN" on the other.

Kind regards,

Håkon