SPI communication with Lis3dh sensor (nrfConnect SDK)

RE: SPI communication with Lis3dh sensor (nrfConnect SDK)

helsing — Wed, 16 Oct 2024 10:46:12 GMT

Hi S.M,

[quote user="S.M"]I noticed only one major change, changed SPI0 to SPI1 are there any issues in that?[/quote]

Certain peripherals share resources and cannot be used simultaneously. For example, the SPI0 and I2C0 peripherals share the same resource, meaning that if I2C0 is enabled, SPI0 cannot be used at the same time, and vice versa. This is why, if I2C0 is being used, you would need to use SPI1 instead of SPI0.

If Guillaume is building for nrf52dk_nrf52832 then i2c0 is enabled by default.

If you have an issue that you would like to discuss further, please create a new ticket, and we will be happy to assist you.

RE: SPI communication with Lis3dh sensor (nrfConnect SDK)

S.M — Tue, 15 Oct 2024 16:35:13 GMT

Hi Guillaume,

Thanks for posting the solution.

I am quite confused, I noticed only one major change, changed SPI0 to SPI1 are there any issues in that?

Thanks

S.M

RE: SPI communication with Lis3dh sensor (nrfConnect SDK)

helsing — Wed, 18 Sep 2024 11:45:38 GMT

Hi Guillaume,

Great to hear that it is now working. Thank you for posting the solution.

Best regards,

Håkon

RE: SPI communication with Lis3dh sensor (nrfConnect SDK)

Guillaume — Mon, 16 Sep 2024 07:45:40 GMT

Hello,

It's was a DTS file issue.

Here the good one :

// Copyright (c) 2024 Nordic Semiconductor ASA
// SPDX-License-Identifier: Apache-2.0

/dts-v1/;
#include <nordic/nrf52832_qfaa.dtsi>

/ {
	model = "x_x";
	compatible = "x,x";

	aliases {
		led0 = &led0;
		led1 = &led1;
		led2 = &led2;
	};

	chosen {
		zephyr,sram = &sram0;
		zephyr,flash = &flash0;
		zephyr,code-partition = &slot0_partition;
	};

	leds{
		compatible = "gpio-leds"; 
		led0: led_0{
			gpios = <&gpio0 10 GPIO_ACTIVE_LOW>;
			label = "Blue LED 0"; 
	    };
		led1: led_1{
			gpios = <&gpio0 9 GPIO_ACTIVE_LOW>;
			label = "Green LED 1"; 
	    };
		led2: led_2{
			gpios = <&gpio0 8 GPIO_ACTIVE_LOW>;
			label = "Red LED 2"; 
	    };
	};
};

&flash0 {
	partitions {
		compatible = "fixed-partitions";
		#address-cells = <1>;
		#size-cells = <1>;

		boot_partition: partition@0 {
			label = "mcuboot";
			reg = <0x0 0xc000>;
		};
		slot0_partition: partition@c000 {
			label = "image-0";
			reg = <0xc000 0x32000>;
		};
		slot1_partition: partition@3e000 {
			label = "image-1";
			reg = <0x3e000 0x32000>;
		};
		scratch_partition: partition@70000 {
			label = "image-scratch";
			reg = <0x70000 0xa000>;
		};
		storage_partition: partition@7a000 {
			label = "storage";
			reg = <0x7a000 0x6000>;
		};
	};
};


&gpio0 {
	status = "okay";
};

&gpiote {
    status = "okay";
};


&pinctrl {
	spi_master_default: spi_master_default {
		group1 {
            psels = <NRF_PSEL(SPIM_SCK, 0, 15)>,
					<NRF_PSEL(SPIM_MOSI, 0, 20)>,
					<NRF_PSEL(SPIM_MISO, 0, 19)>;
		};
	};

	spi_master_sleep: spi_master_sleep { 
		group1 {
            psels = <NRF_PSEL(SPIM_SCK, 0, 15)>,
					<NRF_PSEL(SPIM_MOSI, 0, 20)>,
					<NRF_PSEL(SPIM_MISO, 0, 19)>;
			low-power-enable;
		};
	};
};

lis3dh_spi_master: &spi1 {
	compatible = "nordic,nrf-spi";
    status = "okay";
	pinctrl-0 = <&spi_master_default>;
	pinctrl-1 = <&spi_master_sleep>;
    pinctrl-names = "default","sleep";
    cs-gpios = <&gpio0 18 GPIO_ACTIVE_LOW>;
    
    reg_lis3dh_master: lis3dh@0{
        compatible = "st,lis2dh";
        reg = <0>;
        irq-gpios = <&gpio0 16 GPIO_ACTIVE_HIGH>, <&gpio0 17 GPIO_ACTIVE_HIGH>;
        spi-max-frequency = <8000000>;
    };
};

RE: SPI communication with Lis3dh sensor (nrfConnect SDK)

Guillaume — Fri, 13 Sep 2024 13:14:19 GMT

Hi Helsing,

I'am using nRF Connect SDK v2.6.0. Here the prf.config :

# SPI
CONFIG_SPI=y
CONFIG_SPI_NRFX=y
CONFIG_NRFX_SPI0=y
CONFIG_SPI_ASYNC=y
CONFIG_CONSOLE=y

I have checked the MOSI, MISO, and SCK lines with an oscilloscope and compared them with the previous code under FreeRTOS I don't see any differences, the data is good but I don't have acces on the CS line, so I believe the issue is coming from the CS (Chip Select) line, as indicated by the error message.

*** Booting nRF Connect SDK v3.5.99-ncs1 ***
SPI master chip select device not ready!
SPI TX: 0x8f
SPI RX: 0xff

I'm spi_init() and after spi_write_test_msg() on the main function.

Here is my updated code:

/*
 * Copyright (c) 2016 Intel Corporation
 *
 * SPDX-License-Identifier: Apache-2.0
 */

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

/* 1000 msec = 1 sec */
#define SLEEP_TIME_MS   1000

#define LIS3DH_OUT_X_L                  0x28
#define LIS3DH_OUT_X_H                  0x29

#define MY_SPI_MASTER DT_NODELABEL(lis3dh_spi_master)
#define MY_SPI_MASTER_CS_DT_SPEC SPI_CS_GPIOS_DT_SPEC_GET(DT_NODELABEL(reg_lis3dh_master))

#define SPI_BUFSIZE  8   //SPI Communication buffer size
uint8_t   spi_tx_buf[SPI_BUFSIZE]; // spitx buffer
uint8_t   spi_rx_buf[SPI_BUFSIZE]; // spirx buffer

#define ADD_REG_WHO_AM_I                0x0F
#define UC_WHO_AM_I_DEFAULT_VALUE       0x3F
/* set read single command. Attention: command must be 0x3F at most */
#define SET_READ_SINGLE_CMD(x)         (x |0x80)

// SPI master functionality
const struct device *spi_dev;
static struct k_poll_signal spi_done_sig = K_POLL_SIGNAL_INITIALIZER(spi_done_sig);


void printbuffers()
{
    printk("SPI TX: ");
    for (int j = 0; j<sizeof(spi_tx_buf); j++)
    {
        printk(" %x",spi_tx_buf[j]);
    }
    printk("\r\nSPI RX: ");
    for (int j = 0; j<sizeof(spi_rx_buf); j++)
    {
        printk(" %x",spi_rx_buf[j]);
    }
    printk("\r\n");

}


void spi_init(void)
{
    spi_dev = DEVICE_DT_GET(MY_SPI_MASTER);
    if(!device_is_ready(spi_dev)) {
        printk("SPI master device not ready!\n");
    }
    struct gpio_dt_spec spim_cs_gpio = MY_SPI_MASTER_CS_DT_SPEC;
    if(!device_is_ready(spim_cs_gpio.port)){
        printk("SPI master chip select device not ready!\n");
    }
}

static struct spi_config spi_cfg = {
    .operation = SPI_WORD_SET(8) | SPI_TRANSFER_MSB | SPI_MODE_CPOL | SPI_MODE_CPHA,
    .frequency = 8000000,
    .slave = 0,
    .cs = {.gpio = MY_SPI_MASTER_CS_DT_SPEC, .delay = 2},
};

int spi_write_test_msg(void)
{
    const struct spi_buf tx_buf = {
        .buf = spi_tx_buf,
        .len = sizeof(spi_tx_buf)
    };
    const struct spi_buf_set tx = {
        .buffers = &tx_buf,
        .count = 1
    };

    struct spi_buf rx_buf = {
        .buf = spi_rx_buf,
        .len = sizeof(spi_rx_buf),
    };
    const struct spi_buf_set rx = {
        .buffers = &rx_buf,
        .count = 1
    };

    // Update the TX buffer with a rolling counter
    spi_tx_buf[0] = SET_READ_SINGLE_CMD(ADD_REG_WHO_AM_I);
    printk("SPI TX: 0x%.2x\n", spi_tx_buf[0]);

    // Reset signal
    k_poll_signal_reset(&spi_done_sig);
   
    // Start transaction
    int error = spi_transceive_signal(spi_dev, &spi_cfg, &tx, &rx, &spi_done_sig);
    if(error != 0){
        printk("SPI transceive error: %i\n", error);
        return error;
    }

    // Wait for the done signal to be raised and log the rx buffer
    int spi_signaled, spi_result;
    do{
        k_poll_signal_check(&spi_done_sig, &spi_signaled, &spi_result);
    } while(spi_signaled == 0);
    printk("SPI RX: 0x%.2x\n", spi_rx_buf[1]);

    if (spi_rx_buf[1] == UC_WHO_AM_I_DEFAULT_VALUE)
    {
        printk("LIS3DSH detected rn");
    }

    return 0;
}

Again the DTS file :

// Copyright (c) 2024 Nordic Semiconductor ASA
// SPDX-License-Identifier: Apache-2.0

/dts-v1/;
#include <nordic/nrf52832_qfaa.dtsi>

/ {
	model = "x";
	compatible = "x,x";

	aliases {
		led0 = &led0;
		led1 = &led1;
		led2 = &led2;
	};
	
	chosen {
		zephyr,sram = &sram0;
		zephyr,flash = &flash0;
		zephyr,code-partition = &slot0_partition;
	};

	leds{
		compatible = "gpio-leds"; 
		led0: led_0{
			gpios = <&gpio0 10 GPIO_ACTIVE_LOW>;
			label = "Blue LED 0"; 
	    };
		led1: led_1{
			gpios = <&gpio0 9 GPIO_ACTIVE_LOW>;
			label = "Green LED 1"; 
	    };
		led2: led_2{
			gpios = <&gpio0 8 GPIO_ACTIVE_LOW>;
			label = "Red LED 2"; 
	    };
	};

	reserved-memory {
		#address-cells = <1>;
		#size-cells = <1>;
		ranges;
		memory: memory@20000000 {
			reg = <0x20000000 0x10000>;
		};
	};
};

&flash0 {
	partitions {
		compatible = "fixed-partitions";
		#address-cells = <1>;
		#size-cells = <1>;

		boot_partition: partition@0 {
			label = "mcuboot";
			reg = <0x0 0xc000>;
		};
		slot0_partition: partition@c000 {
			label = "image-0";
			reg = <0xc000 0x32000>;
		};
		slot1_partition: partition@3e000 {
			label = "image-1";
			reg = <0x3e000 0x32000>;
		};
		scratch_partition: partition@70000 {
			label = "image-scratch";
			reg = <0x70000 0xa000>;
		};
		storage_partition: partition@7a000 {
			label = "storage";
			reg = <0x7a000 0x6000>;
		};
	};
};


&gpio0 {
	status = "okay";
};

&gpiote {
    status = "okay";
};

lis3dh_spi_master: &spi0 {
	compatible = "nordic,nrf-spi";
    status = "okay";
    pinctrl-0 = <&spi0_default>;
	pinctrl-1 = <&spi0_sleep>; 
    pinctrl-names = "default","sleep";
    cs-gpios = <&gpio0 18 GPIO_ACTIVE_LOW>;
    
    reg_lis3dh: lis3dh@0{
        compatible = "st,lis2dh";
        reg = <0>;
        irq-gpios = <&gpio0 16 GPIO_ACTIVE_HIGH>, <&gpio0 17 GPIO_ACTIVE_HIGH>;
        spi-max-frequency = <8000000>;
    };
};

&pinctrl {
    spi0_default: spi0_default {
        group1 {
            psels = <NRF_PSEL(SPIM_SCK, 0, 15)>,
					<NRF_PSEL(SPIM_MOSI, 0, 20)>,
					<NRF_PSEL(SPIM_MISO, 0, 19)>;

        };
	};
	spi0_sleep: spi0_sleep {
		group1 {
			psels = <NRF_PSEL(SPIM_SCK, 0, 15)>,
				    <NRF_PSEL(SPIM_MOSI, 0, 20)>,
					<NRF_PSEL(SPIM_MISO, 0, 19)>;
			low-power-enable;
		};	

    };
};

&temp {
	status = "disabled";
};

Do you have some ideas ?

Best regards,

RE: SPI communication with Lis3dh sensor (nrfConnect SDK)

helsing — Wed, 19 Jun 2024 12:57:04 GMT

Hi Guillaume, here are some things to try:

The frequency in spi_cfg is set to 8000000 (8 MHz), whereas in the device tree it is set to 4000000 (4 MHz) in the spi-max-frequency for the lis3dh@0 node. Try to make these two match and see if it improves anything.
Check the return value of spi_transceive(): The spi_transceive() function returns a negative error code if there's a problem with the SPI transfer. You can check this return value to get more information about the error.
Could you try to set the PicoScope to analog and record the output from the SPI pins? Are you not seeing any signals changing/toggeling at all?
Ensure the SPI driver for NRF52832 is enabled in your prj.conf file with CONFIG_SPI=y.

Which nRF Connect SDK version are you using?

RE: SPI communication with Lis3dh sensor (nrfConnect SDK)

Guillaume — Tue, 18 Jun 2024 19:01:07 GMT

Hi Helsing,

Yes of course. Here the .dts file :

// Copyright (c) 2024 Nordic Semiconductor ASA
// SPDX-License-Identifier: Apache-2.0

/dts-v1/;
#include <nordic/nrf52832_qfaa.dtsi>

/ {
	model = "xxx";
	compatible = "xxx,xxx";

	aliases {
		led0 = &led0;
		led1 = &led1;
		led2 = &led2;
	};

	chosen {
		zephyr,sram = &sram0;
		zephyr,flash = &flash0;
		zephyr,code-partition = &slot0_partition;
	};

	leds{
		compatible = "gpio-leds"; 
		led0: led_0{
			gpios = <&gpio0 10 GPIO_ACTIVE_LOW>;
			label = "Blue LED 0"; 
	    };
		led1: led_1{
			gpios = <&gpio0 9 GPIO_ACTIVE_LOW>;
			label = "Green LED 1"; 
	    };
		led2: led_2{
			gpios = <&gpio0 8 GPIO_ACTIVE_LOW>;
			label = "Red LED 2"; 
	    };
	};
};

&flash0 {
	partitions {
		compatible = "fixed-partitions";
		#address-cells = <1>;
		#size-cells = <1>;

		boot_partition: partition@0 {
			label = "mcuboot";
			reg = <0x0 0xc000>;
		};
		slot0_partition: partition@c000 {
			label = "image-0";
			reg = <0xc000 0x32000>;
		};
		slot1_partition: partition@3e000 {
			label = "image-1";
			reg = <0x3e000 0x32000>;
		};
		scratch_partition: partition@70000 {
			label = "image-scratch";
			reg = <0x70000 0xa000>;
		};
		storage_partition: partition@7a000 {
			label = "storage";
			reg = <0x7a000 0x6000>;
		};
	};
};


&gpio0 {
	status = "okay";
};

&gpiote {
    status = "okay";
};


&pinctrl {
	spi_master_default: spi_master_default {
		group1 {
            psels = <NRF_PSEL(SPIM_SCK, 0, 15)>,
					<NRF_PSEL(SPIM_MOSI, 0, 20)>,
					<NRF_PSEL(SPIM_MISO, 0, 19)>;
		};
	};

	spi_master_sleep: spi_master_sleep {
		group1 {
            psels = <NRF_PSEL(SPIM_SCK, 0, 15)>,
					<NRF_PSEL(SPIM_MOSI, 0, 20)>,
					<NRF_PSEL(SPIM_MISO, 0, 19)>;
			low-power-enable;
		};
	};
};

lis3dh_spi_master: &spi1 {
	compatible = "nordic,nrf-spi";
    status = "okay";
	pinctrl-0 = <&spi_master_default>;
	pinctrl-1 = <&spi_master_sleep>;
    pinctrl-names = "default","sleep";
    cs-gpios = <&gpio0 18 GPIO_ACTIVE_LOW>;
    
    reg_lis3dh_master: lis3dh@0{
        compatible = "st,lis2dh";
        reg = <0>;
        irq-gpios = <&gpio0 16 GPIO_ACTIVE_HIGH>, <&gpio0 17 GPIO_ACTIVE_HIGH>;
        spi-max-frequency = <4000000>;
    };
};

And here the spi file :

/*
 * Copyright (c) 2016 Intel Corporation
 *
 * SPDX-License-Identifier: Apache-2.0
 */

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

/* 1000 msec = 1 sec */
#define SLEEP_TIME_MS   1000

#define LIS3DH_OUT_X_L                  0x28
#define LIS3DH_OUT_X_H                  0x29

#define MY_SPI_MASTER DT_NODELABEL(lis3dh_spi_master)
#define MY_SPI_MASTER_CS_DT_SPEC SPI_CS_GPIOS_DT_SPEC_GET(DT_NODELABEL(reg_lis3dh_master))

// SPI master functionality
const struct device *spi_dev;
static struct k_poll_signal spi_done_sig = K_POLL_SIGNAL_INITIALIZER(spi_done_sig);

static void spi_init(void)
{
	spi_dev = DEVICE_DT_GET(MY_SPI_MASTER);
	if(!device_is_ready(spi_dev)) {
		printk("SPI master device not ready!\n");
	}
	struct gpio_dt_spec spim_cs_gpio = MY_SPI_MASTER_CS_DT_SPEC;
	if(!device_is_ready(spim_cs_gpio.port)){
		printk("SPI master chip select device not ready!\n");
	}
}

static struct spi_config spi_cfg = {
	.operation = SPI_WORD_SET(8) | SPI_TRANSFER_MSB | SPI_MODE_CPOL | SPI_MODE_CPHA,
	.frequency = 8000000,
	.slave = 0,
	.cs = {.gpio = MY_SPI_MASTER_CS_DT_SPEC, .delay = 0},
};

static int spi_write_test_msg(void)
{
	static uint8_t counter = 0;
	static uint8_t tx_buffer[2];
	static uint8_t rx_buffer[2];

	const struct spi_buf tx_buf = {
		.buf = tx_buffer,
		.len = sizeof(tx_buffer)
	};
	const struct spi_buf_set tx = {
		.buffers = &tx_buf,
		.count = 1
	};

	struct spi_buf rx_buf = {
		.buf = rx_buffer,
		.len = sizeof(rx_buffer),
	};
	const struct spi_buf_set rx = {
		.buffers = &rx_buf,
		.count = 1
	};

	// Update the TX buffer with a rolling counter
	tx_buffer[0] = LIS3DH_OUT_X_L ;
	printk("SPI TX: 0x%.2x, 0x%.2x\n", tx_buffer[0], tx_buffer[1]);

	// Reset signal
	k_poll_signal_reset(&spi_done_sig);
	
	// Start transaction
	int error = spi_transceive_signal(spi_dev, &spi_cfg, &tx, &rx, &spi_done_sig);
	if(error != 0){
		printk("SPI transceive error: %i\n", error);
		return error;
	}

	// Wait for the done signal to be raised and log the rx buffer
	int spi_signaled, spi_result;
	do{
		k_poll_signal_check(&spi_done_sig, &spi_signaled, &spi_result);
	} while(spi_signaled == 0);
	printk("SPI RX: 0x%.2x, 0x%.2x\n", rx_buffer[0], rx_buffer[1]);
	return 0;
}


int test_spi(void)
{
	int ret;

	spi_init();

	printk("\n SPI master example started\n");

		while (1) {
		spi_write_test_msg();
		if (ret < 0) {
			return 0;
		}
		k_msleep(SLEEP_TIME_MS);
	}

	return 0;
}

For information, I'm using Nrf52832, with lis3dh on SPI communication. It works on SDK5.

Guillaume

RE: SPI communication with Lis3dh sensor (nrfConnect SDK)

helsing — Fri, 07 Jun 2024 14:35:58 GMT

Hi Guillaume,

[quote user="Guillaume PELLETIER"]I don't see anything with the PicoScope.[/quote]

Are you not seeing any communication at all?

Would you be alble to share the .dts file? Or a snippet of your code demonstrating this?

Best regards,

Håkon

RE: SPI communication with Lis3dh sensor (nrfConnect SDK)

Guillaume — Fri, 31 May 2024 14:20:11 GMT

Hello,

Thanks, i don't have issue for the compilation with this code:

/*
 * Copyright (c) 2016 Intel Corporation
 *
 * SPDX-License-Identifier: Apache-2.0
 */

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

/* 1000 msec = 1 sec */
#define SLEEP_TIME_MS   1000

#define LIS3DH_OUT_X_L                  0x28
#define LIS3DH_OUT_X_H                  0x29

#define MY_SPI_MASTER DT_NODELABEL(lis3dh_spi_master)
#define MY_SPI_MASTER_CS_DT_SPEC SPI_CS_GPIOS_DT_SPEC_GET(DT_NODELABEL(reg_lis3dh_master))

// SPI master functionality
const struct device *spi_dev;
static struct k_poll_signal spi_done_sig = K_POLL_SIGNAL_INITIALIZER(spi_done_sig);

static void spi_init(void)
{
    spi_dev = DEVICE_DT_GET(MY_SPI_MASTER);
    if(!device_is_ready(spi_dev)) {
        printk("SPI master device not ready!\n");
    }
    struct gpio_dt_spec spim_cs_gpio = MY_SPI_MASTER_CS_DT_SPEC;
    if(!device_is_ready(spim_cs_gpio.port)){
        printk("SPI master chip select device not ready!\n");
    }
}

static struct spi_config spi_cfg = {
    .operation = SPI_WORD_SET(8) | SPI_TRANSFER_MSB | SPI_MODE_CPOL | SPI_MODE_CPHA,
    .frequency = 8000000,
    .slave = 0,
    .cs = {.gpio = MY_SPI_MASTER_CS_DT_SPEC, .delay = 0},
};

static int spi_write_test_msg(void)
{
    static uint8_t counter = 0;
    static uint8_t tx_buffer[2];
    static uint8_t rx_buffer[2];

    const struct spi_buf tx_buf = {
        .buf = tx_buffer,
        .len = sizeof(tx_buffer)
    };
    const struct spi_buf_set tx = {
        .buffers = &tx_buf,
        .count = 1
    };

    struct spi_buf rx_buf = {
        .buf = rx_buffer,
        .len = sizeof(rx_buffer),
    };
    const struct spi_buf_set rx = {
        .buffers = &rx_buf,
        .count = 1
    };

    // Update the TX buffer with a rolling counter
    tx_buffer[0] = LIS3DH_OUT_X_L;
    printk("SPI TX: 0x%.2x, 0x%.2x\n", tx_buffer[0], tx_buffer[1]);

    // Reset signal
    k_poll_signal_reset(&spi_done_sig);
   
    // Start transaction
    int error = spi_transceive_signal(spi_dev, &spi_cfg, &tx, &rx, &spi_done_sig);
    if(error != 0){
        printk("SPI transceive error: %i\n", error);
        return error;
    }

    // Wait for the done signal to be raised and log the rx buffer
    int spi_signaled, spi_result;
    do{
        k_poll_signal_check(&spi_done_sig, &spi_signaled, &spi_result);
    } while(spi_signaled == 0);
    printk("SPI RX: 0x%.2x, 0x%.2x\n", rx_buffer[0], rx_buffer[1]);
    return 0;
}


int test_spi(void)
{
    int ret;

    spi_init();

    printk("\n SPI master example started\n");

        while (1) {
        spi_write_test_msg();
        if (ret < 0) {
            return 0;
        }
        k_msleep(SLEEP_TIME_MS);
    }

    return 0;
}

But I only received 0xFF on the RX SPI buffer.

My tag works with nrf5_sdk with Segger and we would like to use Visual Studio Code to use Edge Impulse. (i need to get the accelerometer data to feed the ML.)

I don't see anything with the PicoScope. Do you have some idea ? The DTS seem good ...

Best regards,

EDIT by Helsing: Embedding code using Insert->Code for readability.

RE: SPI communication with Lis3dh sensor (nrfConnect SDK)

helsing — Mon, 06 May 2024 14:28:55 GMT

Hi Guillaume,

At first glance, it looks like you have omitted a step with the buffer in test_spi(). Check out this SPI sample:

https://github.com/too1/ncs-spi-master-slave-example/blob/629db4cf8000605ddf46a5ac18936552bae3f52f/src/main.c#L47

Best regards,

Håkon