RE: Using MPU9250 on Thingy52

hmolesworth — Mon, 20 Nov 2023 17:23:31 GMT

Suggestion: always start with high drive in TWI/I2C, SPI, UART etc and only when it works consider reducing drive strength. TWI/I2C would actually use H0D1 on both pins, SPI H0H1, Uart Tx H0H1. Note the link referred to in this post as sometimes the drive strength is unexpectedly overwritten: thingy-91-spi-driver-for-adxl362

RE: Using MPU9250 on Thingy52

Meh — Mon, 20 Nov 2023 17:15:57 GMT

Thanks!

I solved it by adding CONIG_MPU6050=y and CONFIG_SENSOR=y in addition to your suggestion! Thanks for your help :)

RE: Using MPU9250 on Thingy52

Kazi Afroza Sultana — Mon, 20 Nov 2023 12:48:25 GMT

Hello,

Can you add CONFIG_MPU6050_TRIGGER_NONE=y in your prj.conf file and try to build the program again`?

''I reverted to the initial init on my main code, with 1 i2c function as an example, and this is what I got on RTT:'' Can you show me the main.c file of your application so I can reproduce on our Thingy:52?

RE: Using MPU9250 on Thingy52

Meh — Fri, 17 Nov 2023 16:44:57 GMT

I am using bare thingy52 without any code on the main (besides hardware configuration as an i2c device and trying to write it once). I used i2c0(due to the hardware configuration) - and for your question:

thingy52.dts

/*
 * Copyright (c) 2017 Shawn Nock <shawn@monadnock.ca>
 * Copyright (c) 2017 Linaro Limited
 * Copyright (c) 2018 Aapo Vienamo
 *
 * SPDX-License-Identifier: Apache-2.0
 */

/dts-v1/;
#include <nordic/nrf52832_qfaa.dtsi>
#include "thingy52_nrf52832-pinctrl.dtsi"

/ {
	model = "Nordic Thingy52 NRF52832";
	compatible = "nordic,thingy52-nrf52832";

	chosen {
		zephyr,console = &uart0;
		zephyr,shell-uart = &uart0;
		zephyr,bt-mon-uart = &uart0;
		zephyr,bt-c2h-uart = &uart0;
		zephyr,sram = &sram0;
		zephyr,flash = &flash0;
		zephyr,code-partition = &slot0_partition;
	};

	/* These aliases are provided for compatibility with samples */
	aliases {
		led0 = &led0;
		led1 = &led1;
		led2 = &led2;
		sw0 = &button0;
		watchdog0 = &wdt0;
		accel0 = &lis2dh12;
	};

	leds {
		compatible = "gpio-leds";
		/* Lightwell RGB */
		led0: led_0 {
			gpios = <&sx1509b 7 GPIO_ACTIVE_LOW>;
			label = "Red LED";
			//vin-supply = <&vdd_pwr>;
		};
		led1: led_1 {
			gpios = <&sx1509b 5 GPIO_ACTIVE_LOW>;
			label = "Green LED";
			//vin-supply = <&vdd_pwr>;
		};
		led2: led_2 {
			gpios = <&sx1509b 6 GPIO_ACTIVE_LOW>;
			label = "Blue LED";
			//vin-supply = <&vdd_pwr>;
		};
	};

	buttons {
		compatible = "gpio-keys";
		button0: button_0 {
			/* gpio flags need validation */
			gpios = <&gpio0 11 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
			label = "Button";
		};
	};

	vbatt {
		compatible = "voltage-divider";
		io-channels = <&adc 4>;
		output-ohms = <180000>;
		full-ohms = <(1500000 + 180000)>;
		power-gpios = <&sx1509b 4 0>;
	};

	vdd_pwr: vdd-pwr-ctrl {
		compatible = "regulator-fixed";
		regulator-name = "vdd-pwr-ctrl";
		enable-gpios = <&gpio0 30 GPIO_ACTIVE_HIGH>;
		regulator-boot-on;
		startup-delay-us = <1000>;
	};

	spk_pwr: spk-pwr-ctrl {
		compatible = "regulator-fixed-sync", "regulator-fixed";
		regulator-name = "spk-pwr-ctrl";
		enable-gpios = <&gpio0 29 GPIO_ACTIVE_HIGH>;
	};

	mpu_pwr: mpu-pwr-ctrl {
		compatible = "regulator-fixed";
		regulator-name = "mpu-pwr-ctrl";
		enable-gpios = <&sx1509b 8 GPIO_ACTIVE_HIGH>;
		status = "disabled";
	};

	mic_pwr: mic-pwr-ctrl {
		compatible = "regulator-fixed";
		regulator-name = "mic-pwr-ctrl";
		enable-gpios = <&sx1509b 9 GPIO_ACTIVE_HIGH>;
		status = "disabled";
	};

	ccs_pwr: ccs-pwr-ctrl {
		compatible = "regulator-fixed";
		regulator-name = "ccs-pwr-ctrl";
		enable-gpios = <&sx1509b 10 GPIO_ACTIVE_HIGH>;
		status = "disabled";
	};
};

&adc {
	status = "okay";
};

&gpiote {
	status = "okay";
};

&gpio0 {
	status = "okay";
};

&uart0 {
	compatible = "nordic,nrf-uarte";
	status = "okay";
	current-speed = <115200>;
	pinctrl-0 = <&uart0_default>;
	pinctrl-1 = <&uart0_sleep>;
	pinctrl-names = "default", "sleep";
};

&i2c0 {
	compatible = "nordic,nrf-twim";
	status = "okay";
	clock-frequency = <I2C_BITRATE_FAST>;

	pinctrl-0 = <&i2c0_default>;
	pinctrl-1 = <&i2c0_sleep>;
	pinctrl-names = "default", "sleep";
	sx1509b: sx1509b@3e {
		compatible = "semtech,sx1509b";
		reg = <0x3e>;
		vin-supply = <&vdd_pwr>;
		gpio-controller;
		#gpio-cells = <2>;
		ngpios = <16>;
		/* Active-low LEDs init high, all else init low */
		init-out-high = <0xe0e0>;
		init-out-low = <0x1f1f>;
	};

	lps22hb_press: lps22hb_press@5c {
		compatible = "st,lps22hb-press";
		reg = <0x5c>;
		vin-supply = <&vdd_pwr>;
	};

	hts221: hts221@5f {
		compatible = "st,hts221";
		reg = <0x5f>;
		vin-supply = <&vdd_pwr>;
		drdy-gpios = <&gpio0 24 GPIO_ACTIVE_HIGH>;
	};

	ccs811: ccs811@5a {
		compatible = "ams,ccs811";
		reg = <0x5a>;
		vin-supply = <&ccs_pwr>;
		irq-gpios = <&gpio0 22 GPIO_ACTIVE_LOW>;
		reset-gpios = <&sx1509b 11 GPIO_ACTIVE_LOW>;
		wake-gpios = <&sx1509b 12 GPIO_ACTIVE_LOW>;
	};
};

&i2c1 {
	compatible = "nordic,nrf-twim";
	status = "okay";
	clock-frequency = <I2C_BITRATE_FAST>;

	pinctrl-0 = <&i2c1_default>;
	pinctrl-1 = <&i2c1_sleep>;
	pinctrl-names = "default", "sleep";
	lis2dh12: lis2dh12@19 {
		compatible = "st,lis2dh12", "st,lis2dh";
		reg = <0x19>;
		irq-gpios = <&gpio0 12 GPIO_ACTIVE_HIGH>;
	};
};

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

		boot_partition: partition@0 {
			label = "mcuboot";
			reg = <0x00000000 0xc000>;
		};
		slot0_partition: partition@c000 {
			label = "image-0";
			reg = <0x0000C000 0x32000>;
		};
		slot1_partition: partition@3e000 {
			label = "image-1";
			reg = <0x0003E000 0x32000>;
		};
		scratch_partition: partition@70000 {
			label = "image-scratch";
			reg = <0x00070000 0xa000>;
		};

		/*
		 * The flash starting at 0x0007a000 and ending at
		 * 0x0007ffff (sectors 122-127) is reserved for use
		 * by the application.
		 * Storage partition will be used by FCB/LittleFS/NVS
		 * if enabled.
		 */
		storage_partition: partition@7a000 {
			label = "storage";
			reg = <0x0007a000 0x00006000>;
		};
	};
};

Where thingy52_pinctrl.dtsi

/*
 * Copyright (c) 2022 Nordic Semiconductor
 * SPDX-License-Identifier: Apache-2.0
 */

&pinctrl {
	uart0_default: uart0_default {
		group1 {
			psels = <NRF_PSEL(UART_TX, 0, 3)>,
				<NRF_PSEL(UART_RX, 0, 2)>;
		};
	};

	uart0_sleep: uart0_sleep {
		group1 {
			psels = <NRF_PSEL(UART_TX, 0, 3)>,
				<NRF_PSEL(UART_RX, 0, 2)>;
			low-power-enable;
		};
	};

	i2c0_default: i2c0_default {
		group1 {
			psels = <NRF_PSEL(TWIM_SDA, 0, 7)>,
				<NRF_PSEL(TWIM_SCL, 0, 8)>;
		};
	};

	i2c0_sleep: i2c0_sleep {
		group1 {
			psels = <NRF_PSEL(TWIM_SDA, 0, 7)>,
				<NRF_PSEL(TWIM_SCL, 0, 8)>;
			low-power-enable;
		};
	};

	i2c1_default: i2c1_default {
		group1 {
			psels = <NRF_PSEL(TWIM_SDA, 0, 14)>,
				<NRF_PSEL(TWIM_SCL, 0, 15)>;
		};
	};

	i2c1_sleep: i2c1_sleep {
		group1 {
			psels = <NRF_PSEL(TWIM_SDA, 0, 14)>,
				<NRF_PSEL(TWIM_SCL, 0, 15)>;
			low-power-enable;
		};
	};

};

I haven't changed a thing and followed the hardware schematics from the user guide.

RE: Using MPU9250 on Thingy52

Kazi Afroza Sultana — Fri, 17 Nov 2023 15:04:10 GMT

Hello,

''i2c_nrfx_twi: Error 0x0BAE0001 occurred for message 0'' this error is an address NACK on the TWI bus.

Are you sure the address of your i2c device is correct?

Have you tried scoping the SCL/SDA lines to see how they behave?

Also, which application you are observing this? Can you check your zephyr.dts from build folder that i2c pins are assigned properly? You can send this file to me.

The default should look like this:

sda-pin = < 0X7 >;

scl-pin = < 0x8 >;

If these pins are accidentally assigned to some other peripherals, you may see error. There are also some connectors which you can use for external I2C bus on Thingy:52.

https://infocenter.nordicsemi.com/topic/ug_thingy52/UG/thingy52/hw_description/hw_connectors.html?cp=10_0_6_10_1