SPI chip select in device tree overlay in zephyr

[Farhan95]

Dear concern,

I am using nrf52832 as a master and mr25h128a (mram) as a slave and Zephyr RTOS. I want to communicate with this master and salve by SPI. How do I use the gpio pin 7 as a chip select pin? I try to do it in the overlay file (device tree) but facing some error and also in logic analyzer the chip select pin showing no response. Please help me with it.  

[Vidar Berg]

Hello,

I recommend using the example code made by one of coworkers here: https://github.com/too1/ncs-spi-master-slave-example as a reference if you want to use the Zephyr SPI API. The CS pin is retrieved from the DT SPI node here: https://github.com/too1/ncs-spi-master-slave-example/blob/629db4cf8000605ddf46a5ac18936552bae3f52f/src/main.c#L20 

Best regards,

Vidar