k_msgq_get() function return -35

[Devin Li]

Hello,

I run a piece of code on NCS1.8.0 on nRF5340-DK, and it returns -35 when executing k_msgq_get()，but the same code runs on NCS1.5.0 and the k_msgq_get() function works normally.

I checked -35 error code should be " No message of the desired type".

Are there any aspects that need special attention when porting the code of NCS1.5.0 to NCS1.8.0?

From debugging, I know that this function returns an error, but I can't find out why this error occurs. 

[Albrecht Markus Schellenberger]

Hello Devin,

Are there any aspects that need special attention when porting the code of NCS1.5.0 to NCS1.8.0?

that is a little bit hard to say out of the box, unfortunately.

I checked -35 error code should be " No message of the desired type".

-ENOMSG means “Returned without waiting” in this particular case. You are not possibly calling k_msgq_get() from an ISR? Additionally, it can happen due to k_msgq_purge().

Which timeout value are you using?

Regards,

Markus

[Devin Li]

Hello Markus，

I am calling the k_msgq_get () function in a thread but not in the ISR, and the timeout parameter uses K_FOREVER.

Best regards,
Devin

[Devin Li]

Update:

After careful inspection, it was found that the k_msgq_get() function was called in the interrupt handling function of i2s (using nrfx_i2s), and the timeout parameter was set to K_NO_WAIT, which should finally be the error reported at this location -35.

The previous information is wrong, in the actual thread The k_msgq_get() function called is normal. Sorry for misleading you.

BR,
Devin