ChibiOS Free Embedded RTOS

I will try to follow from this cpp file to the source code of Chobios. Thanks you for the help.

Thank you very much for the fast answer. May be you have good tips how to diagnose or debug this issue ? For me is easy to add some messages to the console. Could you pls help to find correct place in SPI driver.

Hi All !
I have the STM32F405 board and non standard CS pin PC4 for SPI1. Is it possible it could be potential bug ?
I have MPU6000 connected to the STM32 and I can not read registers from MPU.
Will it work correctly in ChiBios ? I am not sure I understand correctly how this method is working here ...