Thingy91: Process to flash s340 and 52840

[Brett]

Hi,

I have been doing my development on the 9160DK and now its time to move the code over to the thingy 91.  I managed to get the 9160 flashed by following (https://devzone.nordicsemi.com/guides/cellular-iot-guides/b/getting-started-cellular/posts/how-to-program-any-project-to-the-thingy-91-with-dfu), but the 52840 and s340 softdevice seem to be a different story.

I  tried to follow, without success:
https://infocenter.nordicsemi.com/index.jsp?topic=%2Fug_thingy91_gsg%2FUG%2Fthingy91_gsg%2Fupdating_fw.html

What I am not sure or have tried:
* Do I need to have the SWD-Select on nRF52, before I power-up (whilst holding sw4) ?  I saw one document indicating you needed to, but the above doesnt indicate you need to.  (I tried both)

* The image starts to load, but then I get the `Image Upload Failed: Bad response from device`.  I got the same error with the 9160, but by following the DFU link above, got around the problem - I am not sure how to get around it with the 52840, since I am not using zephyr.

* My 52840 software is using ANT+ therefore, I require the s340 softdevice and am using the legacy nRF5 SDK - since its not supported in zephyr.  The original way to load the s340 was with `nrfjprog` but that doesnt seem to work.

* For the 52840, do I need to use an external connection - say the 9160dk to be able to flash it ?

regards
-brett

[Albrecht Markus Schellenberger]

Hello Brett,

Brett said:

Its only when I load them both together I am unable to test, as I cant connect to the 9160 interface for debugging.

Thanks a lot for the detailed feedback! Are you possibly using P.014 and/or P0.17 in your nRF52840 application?

Regards,

Markus

[Brett]

Hi Markus:

Yes I am, thats how I was connecting UART's between the 52840 and the 9160.  I gather based on your question, I need to use different pins in the thingy vs the 9160DK.

52840:

nrf_libuarte_async_config_t nrf_libuarte_async_config = {
      .tx_pin = 17,
      .rx_pin = 20,
      .baudrate = NRF_UARTE_BAUDRATE_115200,
      .parity = NRF_UARTE_PARITY_EXCLUDED,
      .hwfc = NRF_UARTE_HWFC_DISABLED,
      .timeout_us = 100,
      .int_prio = APP_IRQ_PRIORITY_LOW};

9160:

&uart1 {
        compatible = "nordic,nrf-uarte";
        status = "okay";
        current-speed = <115200>;
    hw-flow-control;
        tx-pin = <18>;
        rx-pin = <17>;
        rts-pin = <19>;
        cts-pin = <21>;
}:

regards
-brett