nrf52dk not able to build the SPI project.

RE: nrf52dk not able to build the SPI project.

Sigurd Hellesvik — Mon, 10 Feb 2025 12:54:05 GMT

Hi,

There are three alternatives as I see it:

1. I see that zephyr has drivers for some different max chips. See sensor samples. While this is not the exact sensor you got, sometimes the interface is similar enough so that you can just use the same driver. Worth a try.

2. Learn how to use SPI in our DevAcademy lesson on SPI.

3. If you want to integrate the sensor more properly, but wich requires some more work: see DevAcademy Intermediate: Lesson 7 – Device driver model.

Regards,
Sigurd Hellesvik

RE: nrf52dk not able to build the SPI project.

Sagar Patel — Fri, 07 Feb 2025 13:31:29 GMT

&spi1 {
	compatible = "nordic,nrf-spi";
	status = "okay";
	pinctrl-0 = <&spi1_default>;
	pinctrl-1 = <&spi1_sleep>;
	pinctrl-names = "default", "sleep";
	cs-gpios = <&gpio0 28 GPIO_ACTIVE_LOW>;
	reg_my_spi_master: spi-dev-a@0 {
		reg = <0>;
		spi-max-frequency = <4000000>;  // Set frequency to 4 MHz
	};
};

Overlay file

RE: nrf52dk not able to build the SPI project.

Sagar Patel — Fri, 07 Feb 2025 13:30:28 GMT

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

static const struct spi_dt_spec spi1_spec = SPI_DT_SPEC_GET(
    DT_NODELABEL(reg_my_spi_master),  // Device tree node label
    SPI_WORD_SET(8),                  // 8-bit word size
    0                                 // CS release delay
);

static void readRegister()
{
	int err;
	uint8_t chip_id[3];
	uint8_t spiTxCommand[1];
	spiTxCommand[0] = ((0x0F << 1) | 0x01);

	const struct spi_buf tx_buf = {
		.buf = &spiTxCommand,
		.len = sizeof(spiTxCommand)
	};

    const struct spi_buf_set tx = {
		.buffers = &tx_buf,
		.count = 1
	};

    struct spi_buf rx_buf[2] = {
		{
			.buf = NULL,
			.len = 1
		},
		{
			.buf = chip_id,
			.len = 3
		}
	}; // 24 bit register + 1 dummy byte
    
	const struct spi_buf_set rx = {
		.buffers = rx_buf,
		.count = 2
	};
	
	do
	{
		err = spi_transceive_dt(&spi1_spec, &tx, &rx);
		if (err  < 0) { break; }

	} while (false);

	printk("MAX30001 ID: 0x%02X 0x%02X 0x%02X\n", (uint8_t)chip_id[0], (uint8_t)chip_id[1], (uint8_t)chip_id[2]);
}


int main(void)
{
	if (!spi_is_ready_dt(&spi1_spec)) {
		printf("SPI1 DEV NOT READY\n");
		return 0;
	}

	readRegister();

	while (1) {
		readRegister();
		k_msleep(1000);
	}
	return 0;
}

RE: nrf52dk not able to build the SPI project.

Sagar Patel — Fri, 07 Feb 2025 13:29:39 GMT

I have attached the logs

FAILED: CMakeFiles/app.dir/src/main.c.obj 
C:/nrf52/my_sample/sample_SPI/build/sample_SPI/zephyr/include/generated/zephyr/devicetree_generated.h:12836:42: error: 'DT_N_S_soc_S_spi_40004000_S_spi_dev_a_0_P_frame_format' undeclared here (not in a function); did you mean 'DT_N_S_soc_S_spi_40004000_S_spi_dev_a_0_P_reg'?
12836 | #define DT_N_NODELABEL_reg_my_spi_master DT_N_S_soc_S_spi_40004000_S_spi_dev_a_0
      |                                          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
C:/ncs/v2.9.0/zephyr/include/zephyr/devicetree.h:4879:29: note: in definition of macro 'DT_CAT3'
 4879 | #define DT_CAT3(a1, a2, a3) a1 ## a2 ## a3
      |                             ^~
C:/ncs/v2.9.0/zephyr/include/zephyr/drivers/spi.h:352:25: note: in expansion of macro 'DT_PROP'
  352 |                         DT_PROP(node_id, frame_format) |                        \
      |                         ^~~~~~~
C:/ncs/v2.9.0/zephyr/include/zephyr/drivers/spi.h:404:27: note: in expansion of macro 'SPI_CONFIG_DT'
  404 |                 .config = SPI_CONFIG_DT(node_id, operation_, delay_) \
      |                           ^~~~~~~~~~~~~
C:/nrf52/my_sample/sample_SPI/src/main.c:10:45: note: in expansion of macro 'SPI_DT_SPEC_GET'
   10 | static const struct spi_dt_spec spi1_spec = SPI_DT_SPEC_GET(
      |                                             ^~~~~~~~~~~~~~~
C:/ncs/v2.9.0/zephyr/include/zephyr/devicetree.h:4877:24: note: in expansion of macro 'DT_N_NODELABEL_reg_my_spi_master'
 4877 | #define DT_CAT(a1, a2) a1 ## a2
      |                        ^~
C:/ncs/v2.9.0/zephyr/include/zephyr/devicetree.h:200:29: note: in expansion of macro 'DT_CAT'
  200 | #define DT_NODELABEL(label) DT_CAT(DT_N_NODELABEL_, label)
      |                             ^~~~~~
C:/nrf52/my_sample/sample_SPI/src/main.c:11:5: note: in expansion of macro 'DT_NODELABEL'
   11 |     DT_NODELABEL(reg_my_spi_master),  // Device tree node label
      |     ^~~~~~~~~~~~
[47/148] Building C object zephyr/arch/arch/arm/core/cortex_m/CMakeFiles/arch__arm__core__cortex_m.dir/scb.c.obj
ninja: build stopped: subcommand failed.
FAILED: _sysbuild/sysbuild/images/sample_SPI-prefix/src/sample_SPI-stamp/sample_SPI-build C:/nrf52/my_sample/sample_SPI/build/_sysbuild/sysbuild/images/sample_SPI-prefix/src/sample_SPI-stamp/sample_SPI-build