Xiao BLE Sense & IMU - ZephyrOS

RE: Xiao BLE Sense & IMU - ZephyrOS

Akshay Mehta — Thu, 09 Jan 2025 21:22:06 GMT

This is an older forum post, but I wanted to follow up on the current status. Our team specializes in Zephyr and Rust, and we’re ready to assist.

Best,

Akshay

RE: Xiao BLE Sense & IMU - ZephyrOS

Kenneth — Mon, 14 Oct 2024 11:36:02 GMT

Can you check out this thread a bit, and check if this indirectly answers your questions? Lis3dh interrupt pins configuration

Kenneth

RE: Xiao BLE Sense & IMU - ZephyrOS

vgarcive — Thu, 03 Oct 2024 08:25:31 GMT

Any news on this?

I have been trying to use i2c_write() and i2c_read() functions to modify and route the INT1 of the IMU but it seems not to update the register correctly, Is there any way that I can modify the register with sensor_att_set() or similar?

Using the example on Zephyr documentation Zephyr example, I always read SENSOR_TRIG_TIMER instead of DATA_READY or DOUBLE_TAP or any other. What am I doing wroing?

RE: Xiao BLE Sense & IMU - ZephyrOS

PjGlasso — Tue, 06 Aug 2024 00:48:27 GMT

Hi there,

You can Route all the functions for interrupt on INT1 PIN , on the LSM6DS3 check it out documented on Seeed Forum and in the IMU data sheet. I have a Motion & Fall demo on there and I write to a register in the config that tells it which INTpin is registered.

HTH

GL :-) PJ

PS, I just started using the NRF_SDK from PL.IO & Arduino I need more BEEF! I want to add coded PHY BLE connection to my Xiao Setup

the standard BLE stuff works great I want more range. Is there a Xiao Devicetree overlay that exists

THnx

RE: Xiao BLE Sense & IMU - ZephyrOS

runsiv — Fri, 28 Jun 2024 12:32:05 GMT

Hi Victor

Kenneth is out of office so I will take over the case.I will need to look a bit into this and get back to you

Regards

Runar

RE: Xiao BLE Sense & IMU - ZephyrOS

vgarcive — Tue, 25 Jun 2024 10:19:02 GMT

Well, INT1 trigger it should be working because the data ready event is triggering correctly and I2C is working correctly because I can configure and modify differet data on the IMU and the response is OK and when reading the register again it gets updated so, I dont think that should be a problem, I guess is more how to properly configure the IMU.

RE: Xiao BLE Sense & IMU - ZephyrOS

Kenneth — Sat, 22 Jun 2024 09:55:27 GMT

I don't know exactly which configuration options that is available on INT1 and INT2, I guess you must refer to the datasheet for the sensor in question.

I do recommend in general to search through nRF Connect SDK for instance for 'CONFIG_LSM6DSL_TRIGGER' and check which other projects may be doing something similiar. I also recommend to have a logic analyzer available so you observe the i2c and INT1 pin, this may give valuable information what the problem may be (e.g. INT1 trigger or not).

Kenneth

RE: Xiao BLE Sense & IMU - ZephyrOS

vgarcive — Fri, 21 Jun 2024 09:36:06 GMT

I saw there is a "anym-on-int1" for then overlay on the lis3dh accel, Do you know if there is something similitar for the LSM6D?

I paste here the DTS i am using because on my overlay there is nothing related to IMU

/ {
	model = "Seeed XIAO BLE Sense";
	compatible = "seeed,xiao-ble", "seeed,xiao-ble-sense";

	lsm6ds3tr-c-en {
		compatible = "regulator-fixed-sync", "regulator-fixed";
		enable-gpios = <&gpio1 8 (NRF_GPIO_DRIVE_S0H1 | GPIO_ACTIVE_HIGH)>;
		regulator-name = "LSM6DS3TR_C_EN";
		regulator-boot-on;
		startup-delay-us = <3000>;
	};
};

&i2c0 {
	compatible = "nordic,nrf-twim";
	/* Cannot be used together with spi0. */
	status = "okay";
	pinctrl-0 = <&i2c0_default>;
	pinctrl-1 = <&i2c0_sleep>;
	pinctrl-names = "default", "sleep";
	clock-frequency = <I2C_BITRATE_FAST>;

	lsm6ds3tr_c: lsm6ds3tr-c@6a {
		compatible = "st,lsm6dsl";
		reg = <0x6a>;
		irq-gpios = <&gpio0 11 GPIO_ACTIVE_HIGH>;
		status = "okay";
	};
};

Thank you!!

RE: Xiao BLE Sense & IMU - ZephyrOS

vgarcive — Fri, 21 Jun 2024 09:32:45 GMT

Hi Kenneth,

I checked the links you shared, I am doing everything exactly the same but nothing works. After some time reviewing absolutely everything, I saw the following on the XIAO schematics:

It seems like INT2 is not routed to anything so I guess all the motion events are not trigger because of this. The question now is,

Is there any way we can route the "SENSOR_TRIG_DELTA or SENSOR_TRIG_THRESHOLD" events on the INT1 line?

RE: Xiao BLE Sense & IMU - ZephyrOS

vgarcive — Thu, 13 Jun 2024 14:52:41 GMT

Hi Kenneth,

Thank you for the reply. I will check the link you mention to see if it can clarify something and I will let you know.

Kind regards

RE: Xiao BLE Sense & IMU - ZephyrOS

Kenneth — Thu, 13 Jun 2024 13:58:23 GMT

Hello,

I unfortunately don't have time to look into this at the moment, but maybe you can find the following discussion useful:
Lis3dh interrupt pins configuration

I suspect missing/wrong irq-gpios in devicetree node for the sensor in question.

Kenneth