NRF5340 rev D custom board with nrf5340PDK

[davvid]

Hi,

We used the nrf52840 in our first release of our project. And we decided to upgrade to the NRF5340. We already have port our software to the Zephyr OS on the nrf52840 to prepare the new source.

We received our custom PCB with the new NRF5340 rev D (NRF5340 QKAAD). I tried to flash on it the most basic hello_world sample of the zephyr OS. To do that, I use our NRF5340-PDK with PCA 1095 v0.8.0 2019.51 and a probe to flash our custom board.

The hello_world sample works well on the PDK but on our custom board the Zephyr OS don't boot, by using the debugger, it looks like Zephyr initialize board and main thread and then it goes into an idle loop without going to the main. (I did some test with debugging, RTT logger but I had only few information with it on our custom board). We don't use a LFXO on our custom board so I tried to set or not the configuration parameter CONFIG_SOC_ENABLE_LFXO.

I also tried to use default nrf5340_5340dk_cpuapp and our custom board definition, but the result is always the same. On the PDK board it is working, but not on our custom board.

I use NCS V1.5.0-rc1, NRF Command line Tools v10.12.1 and arm-none-eabi 10.2.1. I tried with master branch of NCS and Zephyr but without positive result.

Do you have any clue of what is going wrong ?

Thanks in advance for your help

[Simon]

Could you try to set these in <board name>_defconfig of your custom board folder

CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y
CONFIG_CLOCK_CONTROL_NRF_K32SRC_XTAL=n

Check the file <sample>/<build folder>/zephyr/config to confirm that these configs are set correctly.

From some work I did earlier with a custom board running NCS BLE samples, I remember I had to set CONFIG_BT_SMP=y for it to work, but I don't remember/can't explain why at the moment.

Best regards,

Simon

[davvid]

Hi,

Thanks you a lot for your help it works ! 

Regards,

David

[Simon]

I'm happy to help, and nice to hear that it fixed the issue for you