RE: nRF52832 with external Infineon OPTIGA Trust X

ezamp — Sat, 16 Jan 2021 20:12:55 GMT

Thanks for the reply.

From the logic analyser I have seen that SDA and SCL always remain high. Unfortunately the SDA and SCL pins were incorrectly enumerated, correcting this error the code works.

Thanks!

RE: nRF52832 with external Infineon OPTIGA Trust X

Kenneth — Tue, 12 Jan 2021 14:23:09 GMT

I have not used the OPTIGA Trust X chip (don't have one here at the home office), but from my understanding it is using i2c as serial interface, and I suspect the error code is that the i2c is not able to communicate with the chip (either invalid pins, missing pull-up resistors, wrong i2c address, chip not powered, grounding missing or similar). I can see similar error code when running the example as-is with no chip connected:

There is little information in the description of the example:
https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.0.2/ifx_optiga_custom_example.html

My suggestion is to hook up a logic analyzer to the i2c interface and check if there is communication on the i2c, that may give some indication of the problem that I may relay to the team that have worked on the example.

I used the \examples\crypto\ifx_optiga_custom_example as example project here.