SPI transfer failure

[Roei]

Hi,

I have a strange issue on my device.

Once in a while, after turning on my device and connect it to the PC via NFC trigger, the device fails during writing to external flash via nrfx_spim_xfer.

The function nrfx_spim_xfer returns NRF_SUCCESS, but after that, the device waits too long (9000 times in a for loop), until SPIM event handler is called.

After that, the device resets itself, maybe due to a fatal error.

The SPI is protected by a mutex in my application.

Is there any option that the NFC is related to that? Maybe it's something with power on process? Any ideas?

Thanks!

[Jørgen Holmefjord]

Hi,

If the device resets, it is typically due to an error code. Have you debugged the code to see what is causing the error code, and what error code it is reporting?

It is very hard to say anything specific without knowing the error, and/or looking into your code.

Best regards,
Jørgen

[Roei]

Do I have an option to save the file name and line number of an error? The problem is that it doesn't happen often.

Thanks!

[Jørgen Holmefjord]

You can use the flashlog/crashlog backend for NRF_LOG.

[Roei]

Hi,

I didn't understand how to use that - do you have any example?

Thanks!

[Jørgen Holmefjord]

We do not have any examples of using only flashlog/crashlog, but it is used in the Command Line Interface (CLI) Example.

[Roei]

Can I use this in order to debug a failures from one or two days ago? After my device was already shut down?