NRF9160 - multiple SPI slave

[MosheSmartAmr]

Hi, 

I cant find an example / documentation for controlling multiple SPI slaves (by using different CS pins).

can someone please direct me? 

[Vidar Berg]

Hi,

It doesn't look like it should be a problem to control multiple CS pins with the Zephyr SPI API. You can create more instances of the spi_cs_control structure, one for each slave, then make sure to pass the correct CS structure when you call the spi_read/write/transceive functions.

[paul_tanner]

I have tried both spi3 and spi2 in separate examples which work OK.  However, when I put both of them in the same example I get a run-time error "SPI device SPI_2 not found"

I'm using nrf9160-DK with this overlay file and building with west:

```

&spi2 {
mosi-pin = <31>;
compatible = "nordic,nrf-spim";
led_strip: ws2812@0 {
compatible = "worldsemi,ws2812-spi";
label = "WS2812";

/* SPI */
reg = <0>; /* necessary for SPI bindings */
spi-max-frequency = <4000000>;

/* WS2812 */
chain-length = <1>; /* arbitrary; change at will */
spi-one-frame = <0x70>;
spi-zero-frame = <0x40>;
};
};

&uart2 {
status = "disabled";
};

/ {
aliases {
led-strip = &led_strip;
};
};

&spi3 {
status = "okay";
sck-pin = <11>;
mosi-pin = <10>;
miso-pin = <12>;
cs-gpios = <&gpio0 13 GPIO_ACTIVE_LOW>;

bme280@13 {
compatible = "bosch,bme280";
reg = <0x00>;
spi-max-frequency = <4000000>;
label = "BME280";
};
};

&uart3 {
status = "disabled";
};

```

In my prj.conf I have:

```

## sensors
CONFIG_SENSOR=y
CONFIG_SPI=y
CONFIG_I2C=n
CONFIG_BME280=y

##LEDs
CONFIG_LED_STRIP=y
CONFIG_WS2812_STRIP=y

```

I went back to the single SPI examples and found that I can't use either SPI1 or 2 - same error.

Any suggestions please?

[Vidar Berg]

Please continue this in the other post you created here: https://devzone.nordicsemi.com/f/nordic-q-a/72400/9160-overlay-for-multiple-spi-instances. We will try to get you an answer today.