Support for SPI Slave in nRF9160

[dboling]

  It appears that the current SDK for  the nRF9160 does not support SPI Slave communication. Is this true or have I missed something?  Thanks.

[Håkon Alseth]

Hi,

 

If you mean that there is no sample for SPIS, then; you are right, there's no sample specifically for SPIS.

The drivers and port files are present in zephyr:

https://github.com/NordicPlayground/fw-nrfconnect-zephyr/blob/master/drivers/spi/spi_nrfx_spis.c

  

To enable the module, here with enabling SPIS 3, you can add this to your prj.conf file:

# SPI
CONFIG_SPI=y
CONFIG_SPI_SLAVE=y
CONFIG_SPI_3_NRF_SPIS=y
# 2 = slave only
CONFIG_SPI_3_OP_MODES=2

Note: add "CONFIG_SPI_ASYNC=y" for asynchronous SPIS operation.

 

And you'll also need to set which GPIOs to use and other settings, typically in your project_folder/nrf9160_pca10090ns.overlay (Note, new overlay settings!):

&spi3 {
	compatible = "nordic,nrf-spis";
	status = "okay";
	sck-pin = <10>;
	mosi-pin = <11>;
	miso-pin = <12>;
	csn-pin = <13>;
	def-char = <0x00>;
};

 

Kind regards,

Håkon

[nRF9160]

Hi,

can you please share example code of nRF9160 SPI Slave if you have?