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  • Case ID: 333383
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ADXL362 & MX25R64 not working with nRF9160

pranav-ether

Hi,

I have a custom nRF9160 board. ADXL362 & MX25R64 share the same SPI bus. I'm trying to validate it individually and looks like there is no communication between both nRF9160 & the 2 peripherals.

I'm using nRF9160 DK to program my custom board. I'm using v2.7.0 toolchain & v2.6.1 SDK. I am using custom board files, it was created as mentioned in the Dev Academy lessons.


For ADXL362, I'm using the sample accel_polling. Here's everything related to spi3 in the devicetree.

/ {
    aliases {
        accel0 = &adxl362;
    };
};

&spi3 {
    status = "okay";
    cs-gpios = <&gpio0 8 GPIO_ACTIVE_LOW>; /* ADXL362 CS */

    adxl362: adxl362@0 {
        compatible = "adi,adxl362";
        status = "okay";
        reg = <0>;
        spi-max-frequency = <1000000>; // 8MHz is typically max for ADXL362
        int1-gpios = <&gpio0 9 GPIO_ACTIVE_HIGH>;
    };
};

&spi3 {
	compatible = "nordic,nrf-spim";
	status = "okay";
	// cs-gpios = <&arduino_header 16 GPIO_ACTIVE_LOW>; /* D10 */
	pinctrl-0 = <&spi3_default>;
	pinctrl-1 = <&spi3_sleep>;
	pinctrl-names = "default", "sleep";
};

&pinctrl {
spi3_default: spi3_default {
		group1 {
			psels = <NRF_PSEL(SPIM_SCK, 0, 3)>,
			        <NRF_PSEL(SPIM_MISO, 0, 5)>,
			        <NRF_PSEL(SPIM_MOSI, 0, 4)>;
			nordic,drive-mode = <NRF_DRIVE_H0H1>;
		};
	};

	spi3_sleep: spi3_sleep {
		group1 {
			psels = <NRF_PSEL(SPIM_SCK, 0, 3)>,
			        <NRF_PSEL(SPIM_MISO, 0, 5)>,
			        <NRF_PSEL(SPIM_MOSI, 0, 4)>;
			low-power-enable;
		};
	};
};


This is the output:
[00:00:00.880,340] <err> ADXL362: wrong part_id: 0
*** Booting nRF Connect SDK 3758bcbfa5cd ***
ADXL362 Test[00:00:00.880,432] <err> main: Accelerometer device not found

NOR Flash related details:
Overlay:

&spi3 {
    status = "okay";
    cs-gpios = <&gpio0 25 GPIO_ACTIVE_LOW>;

    mx25r64: mx25r6435f@0 {
        compatible = "jedec,spi-nor";
        status = "okay";
        reg = <0>;
        spi-max-frequency = <8000000>;
        jedec-id = [c2 28 17];
        size = <67108864>; // 64MB
        has-dpd;
        t-enter-dpd = <10000>;
        t-exit-dpd = <35000>;
    };
};

&mx25r64 {
    partitions {
        compatible = "fixed-partitions";
        #address-cells = <1>;
        #size-cells = <1>;

        external_storage: partition@0 {
            label = "external-storage";
            reg = <0x00000000 0x4000000>; // Full 64MB
        };
    };
};

main.c

#include <zephyr/kernel.h>
#include <zephyr/device.h>
#include <zephyr/drivers/flash.h>
#include <zephyr/storage/flash_map.h>

int main(void)
{
    const struct device *flash_dev = DEVICE_DT_GET(DT_NODELABEL(mx25r64));
    if (!device_is_ready(flash_dev))
    {
        printk("External flash device not ready\n");
        return -1;
    }

    uint8_t write_buf[] = "Hello, External Flash!";
    uint8_t read_buf[sizeof(write_buf)];
    off_t offset = 0;

    // Erase
    if (flash_erase(flash_dev, offset, sizeof(write_buf)) != 0)
    {
        printk("Flash erase failed\n");
        return -1;
    }

    // Write
    if (flash_write(flash_dev, offset, write_buf, sizeof(write_buf)) != 0)
    {
        printk("Flash write failed\n");
        return -1;
    }

    // Read
    if (flash_read(flash_dev, offset, read_buf, sizeof(read_buf)) != 0)
    {
        printk("Flash read failed\n");
        return -1;
    }

    // Verify
    if (memcmp(write_buf, read_buf, sizeof(write_buf)) == 0)
    {
        printk("Data written and read successfully!\n");
    }
    else
    {
        printk("Data verification failed\n");
    }
    return 0;
}

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