Trying to use SPI with RT1020 and Zephyr

[f_und_e]

Hi there,

I've been trying to get the SPI periphal running with Zephyr on the RT1020 evaluation board. Sadly,

I get a very unspecific error:

undefined reference to `__device_dts_ord_83'

My prj.conf looks like this:

CONFIG_GPIO=y
CONFIG_SPI=y

I tried other arguments like CONFIG_SPI_ASYNC but that did not change anything.

I am using an .overlay file to add an SPI device:

&lpspi1 {
        trinamic: trinamic@0 {
        compatible = "vnd,spi-device";
        reg = <0>;
        spi-max-frequency = <100000>;
        label = "trinamic";
        };
};

My code looks like that:

Spoiler

#include <zephyr.h>
#include <drivers/spi.h>
#include <drivers/gpio.h>

#define SPI_TEST_DEV DT_COMPAT_GET_ANY_STATUS_OKAY(trinamic)
#define SPI_OP SPI_OP_MODE_MASTER | SPI_MODE_CPOL | SPI_MODE_CPHA | SPI_WORD_SET(8) | SPI_LINES_SINGLE

uint8_t my_buffer[4] = {1, 1, 1, 1};
struct spi_buf my_spi_buffer[1];
const struct spi_buf_set tx_buff = {my_spi_buffer, 1};

const struct spi_dt_spec spi_dev =
    SPI_DT_SPEC_GET(DT_NODELABEL(trinamic), SPI_OP, 0);
uint8_t once = 0;

void main(void)
{

    if (once == 0)
    {

        my_spi_buffer[0].buf = my_buffer;
        my_spi_buffer[0].len = 4;

        spi_write_dt(&spi_dev, &tx_buff);

        once = 1;
    }
}

I don't really get it, sadly the loopback spi example is quite confusing aswell. It would be very kind if someone could help me! Thank you very much.

All the best

[cooked]

Hi @f_und_e , I've been working with Zephyr+TMC recently. Although I've not tested it on NXP yet, you might find the code useful.

Here a description of the progress so far https://www.stefanocottafavi.com/zephyr_os_trinamic/

And here the repo https://github.com/cooked/zephyr-trinamic . The driver for the TMC5160 should be fine for your 5130.

Let me know if that works for you.

cheers,

stef

[f_und_e]

I figured it out. Devicetrees and stuff are confusing.. I'll do a write up in the future. If you need guidance you can look at some code here:

https://github.com/pitchbent/tmc5130_test