nrf9160dk SPI pins

[parthitce]

From the datasheet I understand that any pins in port0 can be used as SPI. But I tried using the pins defined in nrf-sdk here and but there is no response. After searching through devzone, I found pins 11 and 12 can act as MOSI and MISO and I tested it working with spi_loopback. But I couldn't find correct pins to use for CS and SCK. Also I need 2 more pins for SPI slave interrupt and Reset control.

How to configure any pins to act as SPI? I am fine with disabling other interfaces like UART1, UART2 if pin clashes.

Board: nrf9160DK

SDK(latest) : https://github.com/nrfconnect/sdk-zephyr

SDK nrf: https://github.com/nrfconnect/sdk-zephyr

EDIT:
SPI works fine with https://docs.zephyrproject.org/latest/boards/arm/actinius_icarus/doc/index.html Actinius Icarus board and the pins are here.

Thanks in advance for sharing the details.

[Håkon Alseth]

Hi,

 

But I couldn't find correct pins to use for CS and SCK. Also I need 2 more pins for SPI slave interrupt and Reset control.

CS is a generic GPIO. The SPIM module doesn't have a dedicated register to set the CS, as shown in the PSEL.* register:

https://infocenter.nordicsemi.com/topic/ps_nrf9160/spim.html?cp=2_0_0_5_12_5_22#register.PSEL.SCK

 

The CS pin must be set as a normal GPIO and controlled by the application, but there are ways of setting this up in the zephyr drivers, like this:

https://github.com/nrfconnect/sdk-zephyr/blob/master/tests/drivers/spi/spi_loopback/boards/nrf9160dk_nrf9160.conf#L4-L6

You can have a look at the "spi_cs" in the test source code for this specific example.

The SPIx peripheral can be enabled by setting an overlay for your board (($BOARD).overlay):

https://github.com/nrfconnect/sdk-zephyr/blob/master/boards/arm/nrf9160dk_nrf9160/nrf9160dk_nrf9160_common.dts#L125-L131

 

The setup for nRF9160 is very similar to how its done in this case (which was for nRF5340):

https://devzone.nordicsemi.com/f/nordic-q-a/67065/how-to-configure-and-setup-an-spi-device-to-nrf5340 

 

Kind regards,

Håkon