nrf5340 and mcp2515 configure with SPIM4 problem -nrf5340 board_overlay configuration

[Thamil]

 

nrf5340 board_overlay configuration

&spi4 {

    compatible =  "nordic,nrf-spim";

    status = "okay";

    sck-pin = <8>;

    mosi-pin = <9>;

    miso-pin = <10>;

    cs-gpios = <&gpio0 11 GPIO_ACTIVE_LOW>;

    miso-pull-down;

    can1: mcp2515@0

    {

        compatible = "microchip,mcp2515";

        spi-max-frequency = <8000000>;

        int-gpios = <&arduino_header 8 GPIO_ACTIVE_LOW>; /* D2 */

        status = "okay";

        label = "CAN_1";

        reg = <0x0>;

        osc-freq = <16000000>;

        bus-speed = <500000>;

        sjw = <1>;

        prop-seg = <2>;

        phase-seg1 = <7>;

        phase-seg2 = <6>;

        #address-cells = <1>;

        #size-cells = <0>;

    };

};

please give any suggestion. 

[Håkon Alseth]

Hi,

 

Are you using the nrf5340dk_nrf5340 board? If yes, then:

    miso-pin = <10>;

    cs-gpios = <&gpio0 11 GPIO_ACTIVE_LOW>;

These pins are setup to be used by the network core:

https://github.com/nrfconnect/sdk-zephyr/blob/v2.7.99-ncs1-1/boards/arm/nrf5340dk_nrf5340/nrf5340dk_nrf5340_cpunet.dts#L126-L127

 

    sck-pin = <8>;

    mosi-pin = <9>;

These pins are connected to buttons on the nRF5340-DK:

https://github.com/nrfconnect/sdk-zephyr/blob/v2.7.99-ncs1-1/boards/arm/nrf5340dk_nrf5340/nrf5340dk_nrf5340_cpunet.dts#L55-L62

 

I would recommend that you fliip the DK, and look at the pins that are currently routed specifically to a given function, and try to use some that are not currently in use.

 

Kind regards,

Håkon

[Thamil]

thanks for your quick reply. 

I am using nRF5340dk_nRF5340_cpuapp (Application core).

I referred this link.

https://infocenter.nordicsemi.com/index.jsp?topic=%2Fps_nrf5340%2Fchapters%2Fpin.html

I would like to use SPIM4 for configure with MCP2515 . can you please suggest which pin i have to use for SPIM4 mode?

[Håkon Alseth]

Hi,

 

You are setting up the SPI instance with 8 MHz, which all SPIM instances can handle.

As you're using the DK as a basis, you will be limited by its mapping:

https://infocenter.nordicsemi.com/topic/ug_nrf5340_dk/UG/dk/hw_external_memory.html

https://infocenter.nordicsemi.com/topic/ug_nrf5340_dk/UG/dk/hw_buttons_leds.html

Most of the pins on NRF_P1 is available, except P1.00 and P1.01.

 

Kind regards,

Håkon