How to use the nrfx_spim on Zephyr 3.1?

RE: How to use the nrfx_spim on Zephyr 3.1?

Simon — Thu, 30 Jun 2022 14:30:03 GMT

Hello, sorry for misleading you and providing you with a not working method. Test the approach provided by Tristen instead: RE: Which macro to get sck, mosi and miso pin on spi master

Best regards,

Simon

RE: How to use the nrfx_spim on Zephyr 3.1?

Simon — Tue, 28 Jun 2022 17:01:57 GMT

I'll look into this tomorrow.

Best regards,

Simon

RE: How to use the nrfx_spim on Zephyr 3.1?

CacO3 — Mon, 27 Jun 2022 15:36:32 GMT

Hi Simon

Thanks for your paciente!

I tried your suggestions, how ever I get following error:

zephyr/include/generated/devicetree_unfixed.h:8615:37: 
  error: 'DT_N_S_soc_S_spi_4002f000_P_mosi_pin' undeclared (first use in this function); 
  did you mean 'DT_N_S_soc_S_spi_4002f000_P_status'?

on using it as following:

#define MOSI_PIN DT_PROP(DT_NODELABEL(spi3), mosi_pin)

    spi_config.mosi_pin = NRF_GPIO_PIN_MAP(0,MOSI_PIN);

So something seems to be missing but I can't figure out what 😞

RE: How to use the nrfx_spim on Zephyr 3.1?

Simon — Mon, 27 Jun 2022 15:04:33 GMT

Update 30.6.2022: Added strikethrough to incorrect statements

As I mentioned in Which macro to get sck, mosi and miso pin on spi master, use DT_PROP_OR or DT_PROP to fetch the pins from the device tree.

For example, to fetch the miso pin from spi3, you can do the following:

#define MISO_PIN DT_PROP(DT_NODELABEL(spi3), mosi_pin)
.
.
.
spi_config.miso_pin = NRF_GPIO_PIN_MAP(0,MISO_PIN);

I haven't tested this, so please let me know if it works or not.

Best regards,

Siom

RE: How to use the nrfx_spim on Zephyr 3.1?

CacO3 — Mon, 27 Jun 2022 07:59:11 GMT

Dear Simon

Thank you! That helped me to migrate to pinctrl usage.

How ever I still haven't understood how to reference such a pin directly.

I have now following in my device tree:

    /* SPI Interface to ADC
     * nCS_ADC:  P0.16 GPIO_4
     * SCLK_ADC: P0.13 GPIO_1
     * DIN_ADC:  P0.14 GPIO_2
     * DOUT_ADC: P0.15 GPIO_3
     */
    spi3_default: spi3_default {
        group1 {
            psels = <NRF_PSEL(SPIM_SCK, 0, 13)>,
                <NRF_PSEL(SPIM_MISO, 0, 15)>,
                <NRF_PSEL(SPIM_MOSI, 0, 14)>;
        };
    };
&pinctrl {
    spi3_sleep: spi3_sleep {
        group1 {
            psels = <NRF_PSEL(SPIM_SCK, 0, 13)>,
                <NRF_PSEL(SPIM_MISO, 0, 15)>,
                <NRF_PSEL(SPIM_MOSI, 0, 14)>;
            low-power-enable;
        };
    };
};


&spi3 {
    compatible= "nordic,nrf-spim";
    status = "okay";
    pinctrl-0 = <&spi3_default>;
    pinctrl-1 = <&spi3_sleep>;
    pinctrl-names = "default", "sleep";
};

And in my code:

NRF_GPIO_PIN_MAP(0,13)

nrfx_spim_config_t spi_config;
spi_config.miso_pin = NRF_GPIO_PIN_MAP(0,13); // How to fetch from device tree?
[..]

RE: How to use the nrfx_spim on Zephyr 3.1?

Simon — Thu, 23 Jun 2022 14:32:10 GMT

I just answered a similar question here: Which macro to get sck, mosi and miso pin on spi master

Let me know if that answer is not sufficient

Best regards,

Simon