Unable to Connect nRF5340DK with BMI270 Over I2C

RE: Unable to Connect nRF5340DK with BMI270 Over I2C

lcj — Fri, 06 Sep 2024 10:40:38 GMT

Any follow up on this?

RE: Unable to Connect nRF5340DK with BMI270 Over I2C

MichielSch — Fri, 02 Sep 2022 15:02:56 GMT

Hi,

I encountered the same issue in NCS version 2.0.0, the suggested fix to change the BMI270 driver does indeed fix it but that doesn't seem very desirable. Is there already an other more elegant fix or is this still the suggested solution?

Thanks

RE: Unable to Connect nRF5340DK with BMI270 Over I2C

Jonathan Trousdale — Sat, 24 Jul 2021 22:25:53 GMT

Hi Carl,

Thank you, that's very helpful in understanding the cause of the i2c problems. Unfortunately, adding zephyr, concat-buf-size=<128>; to the overlay didn't help. I modified bmi270.c so that reg_write() uses i2c_write() instead of i2c_burst_write() as follows:

static int reg_write(uint8_t reg, const uint8_t *data, uint16_t length,
		     struct bmi270_data *dev)
{
	uint8_t buffer[1+length];
        __ASSERT((1U + length) <= sizeof(buffer),
                          "burst buffer too small");
        buffer[0]=reg;
        memmove(buffer+1,data,length);
        return i2c_write(dev->i2c,buffer,1+length,dev->i2c_addr);
}

With this change to the BMI270 driver, I get streaming data on both the 5340dk and the 52833dk.

As suggested in the struck-through text, I created a pull request here: github.com/.../37190

RE: Unable to Connect nRF5340DK with BMI270 Over I2C

Carl Richard — Fri, 23 Jul 2021 07:37:02 GMT

Additional note here. Before changing the driver you can try to use the concat-buf-size property of the TWIM peripheral. This was implemented/added to prevent the issues you are seeing.

Just add the property to your overlay file with a suitable size. Looking at threads describing the same issue as yours the following overlay, with concat-buf-size at 128, seems to work:

/*
 * Copyright (c) 2021 Bosch Sensortec GmbH
 *
 * SPDX-License-Identifier: Apache-2.0
 */
&arduino_i2c {
    status = "okay";
    zephyr,concat-buf-size = <128>;
    bmi270@68 {
        compatible = "bosch,bmi270";
        reg = <0x68>;
        label = "BMI270";
    };
};

Best regards,
Carl Richard

RE: Unable to Connect nRF5340DK with BMI270 Over I2C

Carl Richard — Fri, 23 Jul 2021 07:18:49 GMT

Hi again, Jonathan!

After digging a little and reading through Marti's comments here I finally tracked down the problem. This issue arises because of how the TWI with easyDMA hardware is implemented on the nRF5340. You can read more about it in this GitHub issue.

In summary burst writes from the nRF5340 generates repeated starts, which are not handled well by some sensors/devices. Seemingly BMI270 is one of these. The fix for this issue is to use the normal i2c_write() function instead of i2c_burst_write(). If you choose to change the driver to work with the nRF5340, please consider doing a PR for the fix for the Zephyr RTOS GitHub repository as well. EDIT: try the method presented in my comment below instead.

You do not see this issue on the nRF52833 as it by default is using TWI without easyDMA.

Thank you for your patience and thank you Marti for the help. It was the following comment that helped me pick up the scent:

[quote user="marti.bolivar.nordic"]From your screenshot, you're getting -EIO from the i2c_burst_write() call on line 35, which indicates a real error coming out of i2c_nrfx_twim_transfer() in the I2C driver, i2c_nrfx_twim.c.[/quote]

Best regards,
Carl Richard

RE: Unable to Connect nRF5340DK with BMI270 Over I2C

Jonathan Trousdale — Fri, 23 Jul 2021 03:49:38 GMT

Hi Marti,

I really appreciate your help. I ran with the extra flags, but I didn't see anything that pointed to an answer in the logs. I am very enthusiastic about the new features on the nrf5340, but this level of complication just to print IMU data over i2c doesn't bode well for the more complex development to come. It seems like we need to stick with the nrf52833 for now. Thanks again for trying to help us find an answer though.

RE: Unable to Connect nRF5340DK with BMI270 Over I2C

marti.bolivar.nordic — Thu, 22 Jul 2021 22:42:26 GMT

Thanks!

From your screenshot, you're getting -EIO from the i2c_burst_write() call on line 35, which indicates a real error coming out of i2c_nrfx_twim_transfer() in the I2C driver, i2c_nrfx_twim.c.

Beyond just looking at the bus, you can build like this to enable more logs:

west build -b nrf5340dk_nrf5340_cpuapp -- -DCONFIG_LOG=y -DCONFIG_LOG_MODE_IMMEDIATE=y  -DEXTRA_CFLAGS="-DNRFX_TWIM_CONFIG_LOG_ENABLED=1 -DNRFX_TWIM_CONFIG_LOG_LEVEL=4"

I'm a bit surprised you're getting a different result on nRF52833DK since it's the same driver, but maybe comparing those logs will show where things go wrong on nRF5340.

RE: Unable to Connect nRF5340DK with BMI270 Over I2C

Jonathan Trousdale — Thu, 22 Jul 2021 02:12:01 GMT

Hi Marti,

Stepping through bmi270_init(), it looks like the error is being generated at ret = write_config_file(drv_dev), see below.

RE: Unable to Connect nRF5340DK with BMI270 Over I2C

marti.bolivar.nordic — Thu, 22 Jul 2021 01:32:04 GMT

Hi Jonathan, sorry to hear you're having trouble.

To try to diagnose, I changed the sample as follows:

gist.github.com/.../7abd6107b22c20470e04e780c58cf119

My goal there is to figure out whether device_get_binding() is returning NULL because

1. the device doesn't exist, or
2. the device initialization function failed

I built with:

$ west build -b nrf5340dk_nrf5340_cpuapp

If the build fails, it's 1. If the build doesn't fail, I'm guessing it's 2. The build succeeded, so it's not 1.

To confirm that it's 2., I would have to run the program with a breakpoint on bmi270_init(), to see if it returns nonzero.

I don't have hardware, though -- could you please get the bmi270_init() return value on your nRF5340 setup to see what happened?

If it's returning nonzero, the error number and a stack trace when bmi270_init() returns would help diagnose further.

RE: Unable to Connect nRF5340DK with BMI270 Over I2C

Jonathan Trousdale — Wed, 21 Jul 2021 20:41:51 GMT

Further update, the BMI270 sample works perfectly on the nRF52833DK. I used the above prj.conf to enable the RTT viewer, and the sample worked without modification (see below). It seems clear that the problem is with the nRF5340DK.

RE: Unable to Connect nRF5340DK with BMI270 Over I2C

Carl Richard — Wed, 21 Jul 2021 11:05:21 GMT

Hello again!

Thank you for the Zephyr.dts. It looks good to me, so the issue isn't there likely. Some more questions:
- Which board are your targeting, nrf5340dk_nrf5340_cpuapp or nrf5340dk_nrf5340_cpuappns?
- Are you able verify there is actually some activity on the I2C pins using a logic analyzer, oscilloscope or similar?
- Have you verified that you are using the correct I2C address? I have a I2C Scanner sample that can be used for checking for I2C addresses on the bus. Some changes might be needed, including an overlay for your target board.

There is production support for the nRF5340 in the current release of NCS/Zephyr, but you can consider using the nRF52840 if that's more fitting for your application. The two devices are very different and interchanging samples won't necessarily out-of-the box.

Best regards,
Carl Richard

RE: Unable to Connect nRF5340DK with BMI270 Over I2C

Jonathan Trousdale — Tue, 20 Jul 2021 22:31:07 GMT

As an update, we had the BMI270 printing valid data on an Arduino Duo in 10 minutes to confirm the problem was not the IMU. Similarly the BMI270 sample suggest this should run with a simple build and flash on a 52840DK. After 3 days we've had no progress getting a simple IMU measurement data stream from the 5340DK. Should we be developing on an nRF52 chip? It seems that Zephyr support for nRF53 is not mature.

RE: Unable to Connect nRF5340DK with BMI270 Over I2C

Jonathan Trousdale — Tue, 20 Jul 2021 15:14:49 GMT

Hi Carl,

Here is zephyr.dts from the build folder:

/dts-v1/;

/ {
	#address-cells = < 0x1 >;
	#size-cells = < 0x1 >;
	model = "Nordic NRF5340 DK NRF5340 Application";
	compatible = "nordic,nrf5340-dk-nrf5340-cpuapp";
	chosen {
		zephyr,entropy = &cryptocell;
		zephyr,flash-controller = &flash_controller;
		zephyr,console = &uart0;
		zephyr,shell-uart = &uart0;
		zephyr,uart-mcumgr = &uart0;
		zephyr,bt-mon-uart = &uart0;
		zephyr,bt-c2h-uart = &uart0;
		zephyr,ipc_shm = &sram0_shared;
		zephyr,sram = &sram0_image;
		zephyr,flash = &flash0;
		zephyr,code-partition = &slot0_partition;
		zephyr,sram-secure-partition = &sram0_s;
		zephyr,sram-non-secure-partition = &sram0_ns;
	};
	aliases {
		led0 = &led0;
		led1 = &led1;
		led2 = &led2;
		led3 = &led3;
		pwm-led0 = &pwm_led0;
		sw0 = &button0;
		sw1 = &button1;
		sw2 = &button2;
		sw3 = &button3;
		bootloader-led0 = &led0;
	};
	soc {
		#address-cells = < 0x1 >;
		#size-cells = < 0x1 >;
		compatible = "nordic,nRF5340-CPUAPP-QKAA", "nordic,nRF5340-CPUAPP", "nordic,nRF53", "simple-bus";
		interrupt-parent = < &nvic >;
		ranges;
		nvic: interrupt-controller@e000e100 {
			compatible = "arm,v8m-nvic";
			reg = < 0xe000e100 0xc00 >;
			interrupt-controller;
			#interrupt-cells = < 0x2 >;
			arm,num-irq-priority-bits = < 0x3 >;
			phandle = < 0x1 >;
		};
		systick: timer@e000e010 {
			compatible = "arm,armv8m-systick";
			reg = < 0xe000e010 0x10 >;
			status = "disabled";
		};
		sram0: memory@20000000 {
			compatible = "mmio-sram";
			reg = < 0x20000000 0x80000 >;
		};
		sram1: memory@21000000 {
			compatible = "mmio-sram";
			reg = < 0x21000000 0x10000 >;
		};
		peripheral@50000000 {
			#address-cells = < 0x1 >;
			#size-cells = < 0x1 >;
			ranges = < 0x0 0x50000000 0x10000000 >;
			flash_controller: flash-controller@39000 {
				compatible = "nordic,nrf53-flash-controller";
				reg = < 0x39000 0x1000 >;
				#address-cells = < 0x1 >;
				#size-cells = < 0x1 >;
				label = "NRF_FLASH_DRV_NAME";
				flash0: flash@0 {
					compatible = "soc-nv-flash";
					label = "NRF_FLASH";
					erase-block-size = < 0x1000 >;
					write-block-size = < 0x4 >;
					reg = < 0x0 0x100000 >;
					partitions {
						compatible = "fixed-partitions";
						#address-cells = < 0x1 >;
						#size-cells = < 0x1 >;
						boot_partition: partition@0 {
							label = "mcuboot";
							reg = < 0x0 0x10000 >;
						};
						slot0_partition: partition@10000 {
							label = "image-0";
							reg = < 0x10000 0x40000 >;
						};
						slot0_ns_partition: partition@50000 {
							label = "image-0-nonsecure";
							reg = < 0x50000 0x30000 >;
						};
						slot1_partition: partition@80000 {
							label = "image-1";
							reg = < 0x80000 0x40000 >;
						};
						slot1_ns_partition: partition@c0000 {
							label = "image-1-nonsecure";
							reg = < 0xc0000 0x30000 >;
						};
						scratch_partition: partition@f0000 {
							label = "image-scratch";
							reg = < 0xf0000 0xa000 >;
						};
						storage_partition: partition@fa000 {
							label = "storage";
							reg = < 0xfa000 0x6000 >;
						};
					};
				};
			};
			adc: adc@e000 {
				compatible = "nordic,nrf-saadc";
				reg = < 0xe000 0x1000 >;
				interrupts = < 0xe 0x1 >;
				status = "okay";
				label = "ADC_0";
				#io-channel-cells = < 0x1 >;
				phandle = < 0x6 >;
			};
			dppic: dppic@17000 {
				compatible = "nordic,nrf-dppic";
				reg = < 0x17000 0x1000 >;
				status = "okay";
				label = "DPPIC";
			};
			egu0: egu@1b000 {
				compatible = "nordic,nrf-egu";
				reg = < 0x1b000 0x1000 >;
				interrupts = < 0x1b 0x1 >;
				status = "okay";
			};
			egu1: egu@1c000 {
				compatible = "nordic,nrf-egu";
				reg = < 0x1c000 0x1000 >;
				interrupts = < 0x1c 0x1 >;
				status = "okay";
			};
			egu2: egu@1d000 {
				compatible = "nordic,nrf-egu";
				reg = < 0x1d000 0x1000 >;
				interrupts = < 0x1d 0x1 >;
				status = "okay";
			};
			egu3: egu@1e000 {
				compatible = "nordic,nrf-egu";
				reg = < 0x1e000 0x1000 >;
				interrupts = < 0x1e 0x1 >;
				status = "okay";
			};
			egu4: egu@1f000 {
				compatible = "nordic,nrf-egu";
				reg = < 0x1f000 0x1000 >;
				interrupts = < 0x1f 0x1 >;
				status = "okay";
			};
			egu5: egu@20000 {
				compatible = "nordic,nrf-egu";
				reg = < 0x20000 0x1000 >;
				interrupts = < 0x20 0x1 >;
				status = "okay";
			};
			i2s0: i2s@28000 {
				compatible = "nordic,nrf-i2s";
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0x28000 0x1000 >;
				interrupts = < 0x28 0x1 >;
				status = "disabled";
				label = "I2S_0";
			};
			ipc: ipc@2a000 {
				compatible = "nordic,nrf-ipc";
				reg = < 0x2a000 0x1000 >;
				interrupts = < 0x2a 0x1 >;
				status = "okay";
				label = "IPC";
			};
			kmu: kmu@39000 {
				compatible = "nordic,nrf-kmu";
				reg = < 0x39000 0x1000 >;
				interrupts = < 0x39 0x1 >;
				status = "okay";
			};
			pdm0: pdm@26000 {
				compatible = "nordic,nrf-pdm";
				reg = < 0x26000 0x1000 >;
				interrupts = < 0x26 0x1 >;
				status = "disabled";
				label = "PDM_0";
			};
			qdec0: qdec@33000 {
				compatible = "nordic,nrf-qdec";
				reg = < 0x33000 0x1000 >;
				interrupts = < 0x33 0x1 >;
				status = "disabled";
				label = "QDEC_0";
			};
			qdec1: qdec@34000 {
				compatible = "nordic,nrf-qdec";
				reg = < 0x34000 0x1000 >;
				interrupts = < 0x34 0x1 >;
				status = "disabled";
				label = "QDEC_1";
			};
			regulators: regulator@4000 {
				compatible = "nordic,nrf-regulators";
				reg = < 0x4000 0x1000 >;
				status = "okay";
			};
			vmc: vmc@81000 {
				compatible = "nordic,nrf-vmc";
				reg = < 0x81000 0x1000 >;
				status = "okay";
			};
			uart0: uart@8000 {
				compatible = "nordic,nrf-uarte";
				reg = < 0x8000 0x1000 >;
				interrupts = < 0x8 0x1 >;
				status = "okay";
				label = "UART_0";
				current-speed = < 0x1c200 >;
				tx-pin = < 0x14 >;
				rx-pin = < 0x16 >;
				rts-pin = < 0x13 >;
				cts-pin = < 0x15 >;
			};
			uart1: arduino_serial: uart@9000 {
				compatible = "nordic,nrf-uarte";
				reg = < 0x9000 0x1000 >;
				interrupts = < 0x9 0x1 >;
				status = "disabled";
				label = "UART_1";
				current-speed = < 0x1c200 >;
				tx-pin = < 0x21 >;
				rx-pin = < 0x20 >;
			};
			uart2: uart@b000 {
				compatible = "nordic,nrf-uarte";
				reg = < 0xb000 0x1000 >;
				interrupts = < 0xb 0x1 >;
				status = "disabled";
				label = "UART_2";
			};
			uart3: uart@c000 {
				compatible = "nordic,nrf-uarte";
				reg = < 0xc000 0x1000 >;
				interrupts = < 0xc 0x1 >;
				status = "disabled";
				label = "UART_3";
			};
			i2c0: i2c@8000 {
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0x8000 0x1000 >;
				clock-frequency = < 0x186a0 >;
				interrupts = < 0x8 0x1 >;
				status = "disabled";
				label = "I2C_0";
			};
			i2c1: arduino_i2c: i2c@9000 {
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0x9000 0x1000 >;
				clock-frequency = < 0x186a0 >;
				interrupts = < 0x9 0x1 >;
				status = "okay";
				label = "I2C_1";
				compatible = "nordic,nrf-twim";
				sda-pin = < 0x22 >;
				scl-pin = < 0x23 >;
				bmi270@68 {
					compatible = "bosch,bmi270";
					reg = < 0x68 >;
					label = "BMI270";
				};
			};
			i2c2: i2c@b000 {
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0xb000 0x1000 >;
				clock-frequency = < 0x186a0 >;
				interrupts = < 0xb 0x1 >;
				status = "disabled";
				label = "I2C_2";
			};
			i2c3: i2c@c000 {
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0xc000 0x1000 >;
				clock-frequency = < 0x186a0 >;
				interrupts = < 0xc 0x1 >;
				status = "disabled";
				label = "I2C_3";
			};
			spi0: spi@8000 {
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0x8000 0x1000 >;
				interrupts = < 0x8 0x1 >;
				status = "disabled";
				label = "SPI_0";
			};
			spi1: spi@9000 {
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0x9000 0x1000 >;
				interrupts = < 0x9 0x1 >;
				status = "disabled";
				label = "SPI_1";
			};
			spi2: spi@b000 {
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0xb000 0x1000 >;
				interrupts = < 0xb 0x1 >;
				status = "okay";
				label = "SPI_2";
				compatible = "nordic,nrf-spim";
				sck-pin = < 0x2f >;
				miso-pin = < 0x2e >;
				mosi-pin = < 0x2d >;
			};
			spi3: spi@c000 {
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0xc000 0x1000 >;
				interrupts = < 0xc 0x1 >;
				status = "disabled";
				label = "SPI_3";
			};
			spi4: arduino_spi: spi@a000 {
				compatible = "nordic,nrf-spim";
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0xa000 0x1000 >;
				interrupts = < 0xa 0x1 >;
				status = "disabled";
				label = "SPI_4";
				sck-pin = < 0x2f >;
				miso-pin = < 0x2e >;
				mosi-pin = < 0x2d >;
				cs-gpios = < &arduino_header 0x10 0x1 >;
			};
			pwm0: pwm@21000 {
				compatible = "nordic,nrf-pwm";
				reg = < 0x21000 0x1000 >;
				interrupts = < 0x21 0x1 >;
				status = "okay";
				label = "PWM_0";
				#pwm-cells = < 0x1 >;
				ch0-pin = < 0x1c >;
				phandle = < 0x4 >;
			};
			pwm1: pwm@22000 {
				compatible = "nordic,nrf-pwm";
				reg = < 0x22000 0x1000 >;
				interrupts = < 0x22 0x1 >;
				status = "disabled";
				label = "PWM_1";
				#pwm-cells = < 0x1 >;
			};
			pwm2: pwm@23000 {
				compatible = "nordic,nrf-pwm";
				reg = < 0x23000 0x1000 >;
				interrupts = < 0x23 0x1 >;
				status = "disabled";
				label = "PWM_2";
				#pwm-cells = < 0x1 >;
			};
			pwm3: pwm@24000 {
				compatible = "nordic,nrf-pwm";
				reg = < 0x24000 0x1000 >;
				interrupts = < 0x24 0x1 >;
				status = "disabled";
				label = "PWM_3";
				#pwm-cells = < 0x1 >;
			};
			gpio0: gpio@842500 {
				compatible = "nordic,nrf-gpio";
				gpio-controller;
				reg = < 0x842500 0x300 >;
				#gpio-cells = < 0x2 >;
				label = "GPIO_0";
				status = "okay";
				port = < 0x0 >;
				phandle = < 0x3 >;
			};
			gpio1: gpio@842800 {
				compatible = "nordic,nrf-gpio";
				gpio-controller;
				reg = < 0x842800 0x300 >;
				#gpio-cells = < 0x2 >;
				ngpios = < 0x10 >;
				label = "GPIO_1";
				status = "okay";
				port = < 0x1 >;
				phandle = < 0x5 >;
			};
			qspi: qspi@2b000 {
				compatible = "nordic,nrf-qspi";
				#address-cells = < 0x1 >;
				#size-cells = < 0x0 >;
				reg = < 0x2b000 0x1000 >;
				interrupts = < 0x2b 0x1 >;
				status = "okay";
				label = "QSPI";
				sck-pin = < 0x11 >;
				io-pins = < 0xd >, < 0xe >, < 0xf >, < 0x10 >;
				csn-pins = < 0x12 >;
				mx25r64: mx25r6435f@0 {
					compatible = "nordic,qspi-nor";
					reg = < 0x0 >;
					writeoc = "pp4io";
					readoc = "read4io";
					sck-frequency = < 0x7a1200 >;
					label = "MX25R64";
					jedec-id = [ C2 28 17 ];
					sfdp-bfp = [ E5 20 F1 FF FF FF FF 03 44 EB 08 6B 08 3B 04 BB EE FF FF FF FF FF 00 FF FF FF 00 FF 0C 20 0F 52 10 D8 00 FF 23 72 F5 00 82 ED 04 CC 44 83 68 44 30 B0 30 B0 F7 C4 D5 5C 00 BE 29 FF F0 D0 FF FF ];
					size = < 0x4000000 >;
					has-dpd;
					t-enter-dpd = < 0x2710 >;
					t-exit-dpd = < 0x88b8 >;
				};
			};
			rtc0: rtc@14000 {
				compatible = "nordic,nrf-rtc";
				reg = < 0x14000 0x1000 >;
				cc-num = < 0x4 >;
				interrupts = < 0x14 0x1 >;
				status = "okay";
				clock-frequency = < 0x8000 >;
				prescaler = < 0x1 >;
				label = "RTC_0";
			};
			rtc1: rtc@15000 {
				compatible = "nordic,nrf-rtc";
				reg = < 0x15000 0x1000 >;
				cc-num = < 0x4 >;
				interrupts = < 0x15 0x1 >;
				status = "okay";
				clock-frequency = < 0x8000 >;
				prescaler = < 0x1 >;
				label = "RTC_1";
			};
			clock: clock@5000 {
				compatible = "nordic,nrf-clock";
				reg = < 0x5000 0x1000 >;
				interrupts = < 0x5 0x1 >;
				status = "okay";
				label = "CLOCK";
			};
			power: power@5000 {
				compatible = "nordic,nrf-power";
				reg = < 0x5000 0x1000 >;
				interrupts = < 0x5 0x1 >;
				status = "okay";
			};
			wdt: wdt0: watchdog@18000 {
				compatible = "nordic,nrf-watchdog";
				reg = < 0x18000 0x1000 >;
				interrupts = < 0x18 0x1 >;
				status = "okay";
				label = "WDT";
			};
			wdt1: watchdog@19000 {
				compatible = "nordic,nrf-watchdog";
				reg = < 0x19000 0x1000 >;
				interrupts = < 0x19 0x1 >;
				status = "disabled";
				label = "WDT_1";
			};
			timer0: timer@f000 {
				compatible = "nordic,nrf-timer";
				status = "okay";
				reg = < 0xf000 0x1000 >;
				cc-num = < 0x6 >;
				interrupts = < 0xf 0x1 >;
				prescaler = < 0x0 >;
				label = "TIMER_0";
			};
			timer1: timer@10000 {
				compatible = "nordic,nrf-timer";
				status = "okay";
				reg = < 0x10000 0x1000 >;
				cc-num = < 0x6 >;
				interrupts = < 0x10 0x1 >;
				prescaler = < 0x0 >;
				label = "TIMER_1";
			};
			timer2: timer@11000 {
				compatible = "nordic,nrf-timer";
				status = "okay";
				reg = < 0x11000 0x1000 >;
				cc-num = < 0x6 >;
				interrupts = < 0x11 0x1 >;
				prescaler = < 0x0 >;
				label = "TIMER_2";
			};
			usbd: usbd@36000 {
				compatible = "nordic,nrf-usbd";
				reg = < 0x36000 0x1000 >;
				interrupts = < 0x36 0x1 >;
				num-bidir-endpoints = < 0x1 >;
				num-in-endpoints = < 0x7 >;
				num-out-endpoints = < 0x7 >;
				num-isoin-endpoints = < 0x1 >;
				num-isoout-endpoints = < 0x1 >;
				status = "okay";
				label = "USBD";
			};
		};
		cryptocell: crypto@50844000 {
			compatible = "nordic,nrf-cc312";
			reg = < 0x50844000 0x1000 >;
			label = "CRYPTOCELL";
			status = "okay";
			#address-cells = < 0x1 >;
			#size-cells = < 0x1 >;
			cryptocell312: crypto@50845000 {
				compatible = "arm,cryptocell-312";
				reg = < 0x50845000 0x1000 >;
				interrupts = < 0x44 0x1 >;
				label = "CRYPTOCELL312";
			};
		};
		gpiote: gpiote@5000d000 {
			compatible = "nordic,nrf-gpiote";
			reg = < 0x5000d000 0x1000 >;
			interrupts = < 0xd 0x5 >;
			status = "okay";
			label = "GPIOTE_0";
		};
		spu: spu@50003000 {
			compatible = "nordic,nrf-spu";
			reg = < 0x50003000 0x1000 >;
			interrupts = < 0x3 0x1 >;
			status = "okay";
		};
		ficr: ficr@ff0000 {
			compatible = "nordic,nrf-ficr";
			reg = < 0xff0000 0x1000 >;
			status = "okay";
		};
		uicr: uicr@ff8000 {
			compatible = "nordic,nrf-uicr";
			reg = < 0xff8000 0x1000 >;
			status = "okay";
		};
	};
	cpus {
		#address-cells = < 0x1 >;
		#size-cells = < 0x0 >;
		cpu@0 {
			device_type = "cpu";
			compatible = "arm,cortex-m33f";
			reg = < 0x0 >;
			#address-cells = < 0x1 >;
			#size-cells = < 0x1 >;
			swo-ref-frequency = < 0x3d09000 >;
			mpu: mpu@e000ed90 {
				compatible = "arm,armv8m-mpu";
				reg = < 0xe000ed90 0x40 >;
				arm,num-mpu-regions = < 0x8 >;
			};
		};
	};
	leds {
		compatible = "gpio-leds";
		led0: led_0 {
			gpios = < &gpio0 0x1c 0x1 >;
			label = "Green LED 0";
		};
		led1: led_1 {
			gpios = < &gpio0 0x1d 0x1 >;
			label = "Green LED 1";
		};
		led2: led_2 {
			gpios = < &gpio0 0x1e 0x1 >;
			label = "Green LED 2";
		};
		led3: led_3 {
			gpios = < &gpio0 0x1f 0x1 >;
			label = "Green LED 3";
		};
	};
	pwmleds {
		compatible = "pwm-leds";
		pwm_led0: pwm_led_0 {
			pwms = < &pwm0 0x1c >;
		};
	};
	buttons {
		compatible = "gpio-keys";
		button0: button_0 {
			gpios = < &gpio0 0x17 0x11 >;
			label = "Push button 1";
		};
		button1: button_1 {
			gpios = < &gpio0 0x18 0x11 >;
			label = "Push button 2";
		};
		button2: button_2 {
			gpios = < &gpio0 0x8 0x11 >;
			label = "Push button 3";
		};
		button3: button_3 {
			gpios = < &gpio0 0x9 0x11 >;
			label = "Push button 4";
		};
	};
	arduino_header: connector {
		compatible = "arduino-header-r3";
		#gpio-cells = < 0x2 >;
		gpio-map-mask = < 0xffffffff 0xffffffc0 >;
		gpio-map-pass-thru = < 0x0 0x3f >;
		gpio-map = < 0x0 0x0 &gpio0 0x4 0x0 >, < 0x1 0x0 &gpio0 0x5 0x0 >, < 0x2 0x0 &gpio0 0x6 0x0 >, < 0x3 0x0 &gpio0 0x7 0x0 >, < 0x4 0x0 &gpio0 0x19 0x0 >, < 0x5 0x0 &gpio0 0x1a 0x0 >, < 0x6 0x0 &gpio1 0x0 0x0 >, < 0x7 0x0 &gpio1 0x1 0x0 >, < 0x8 0x0 &gpio1 0x4 0x0 >, < 0x9 0x0 &gpio1 0x5 0x0 >, < 0xa 0x0 &gpio1 0x6 0x0 >, < 0xb 0x0 &gpio1 0x7 0x0 >, < 0xc 0x0 &gpio1 0x8 0x0 >, < 0xd 0x0 &gpio1 0x9 0x0 >, < 0xe 0x0 &gpio1 0xa 0x0 >, < 0xf 0x0 &gpio1 0xb 0x0 >, < 0x10 0x0 &gpio1 0xc 0x0 >, < 0x11 0x0 &gpio1 0xd 0x0 >, < 0x12 0x0 &gpio1 0xe 0x0 >, < 0x13 0x0 &gpio1 0xf 0x0 >, < 0x14 0x0 &gpio1 0x2 0x0 >, < 0x15 0x0 &gpio1 0x3 0x0 >;
		phandle = < 0x2 >;
	};
	arduino_adc: analog-connector {
		compatible = "arduino,uno-adc";
		#io-channel-cells = < 0x1 >;
		io-channel-map = < 0x0 &adc 0x0 >, < 0x1 &adc 0x1 >, < 0x2 &adc 0x2 >, < 0x3 &adc 0x3 >, < 0x4 &adc 0x4 >, < 0x5 &adc 0x5 >;
	};
	reserved-memory {
		#address-cells = < 0x1 >;
		#size-cells = < 0x1 >;
		ranges;
		sram0_image: image@20000000 {
			reg = < 0x20000000 0x70000 >;
		};
		sram0_s: image_s@20000000 {
			reg = < 0x20000000 0x40000 >;
		};
		sram0_ns: image_ns@20040000 {
			reg = < 0x20040000 0x30000 >;
		};
		sram0_shared: memory@20070000 {
			reg = < 0x20070000 0x10000 >;
		};
	};
};

RE: Unable to Connect nRF5340DK with BMI270 Over I2C

Carl Richard — Tue, 20 Jul 2021 14:59:53 GMT

Hello, Jonathan!

Thanks for reaching out! Could you please share the Zephyr.dts file (located in build/zephyr/) so that I can verify that the hardware configuration?

Best regards,
Carl Richard

RE: Unable to Connect nRF5340DK with BMI270 Over I2C

JoeD7 — Mon, 19 Jul 2021 15:09:42 GMT

Bump for interest in the solution