Thingy 91: Bus Fault when trying to set up I2S on Zephyr

RE: Thingy 91: Bus Fault when trying to set up I2S on Zephyr

Håkon Alseth — Mon, 06 Apr 2020 13:57:05 GMT

Hi Nils,

I am glad to hear it worked. I will have a look at getting the NRF_I2S into the spm module on a more permanent basis, so you do not need to manually edit the file in the future.

Kind regards,

Håkon

RE: Thingy 91: Bus Fault when trying to set up I2S on Zephyr

Nils Ruf — Mon, 06 Apr 2020 13:31:10 GMT

Hi Håkon,

your suggested solution works fine for me.

Thank you very much.

Kind regards

Nils

RE: Thingy 91: Bus Fault when trying to set up I2S on Zephyr

Håkon Alseth — Mon, 06 Apr 2020 13:20:17 GMT

Hi,

Unfortunately, I2S isn't added as a non-secure peripheral to spm.c.

In order to run I2S in non-secure, you have to manually forward that peripheral in this array in file spm.c:

https://github.com/NordicPlayground/fw-nrfconnect-nrf/blob/master/subsys/spm/spm.c#L357

By adding:

PERIPH("NRF_I2S", NRF_I2S_S, true),

Could you try this and see if it doesn't fault now?

Kind regards,

Håkon