MEMS (sensors)

Hello,can anyone tell me what I am doing wrong?For example, I can't get app_mems.c (eCompass) to debug.The debugger does not stop when I set a breakpoint on subsequent function calls because, for whatever reason, the “SensorReadRequest” always has the value 0.:RTC_Handler(&msg_dat);Accelero_Sensor_Handler(&msg_dat);Gyro_Sensor_Handler(&msg_dat);Magneto_Sensor_Handler(&msg_dat);Humidity_Sensor_Handler(&msg_dat);Temperature_Sensor_Handler(&msg_dat);Pressure_Sensor_Handler(&msg_dat); I also need direct access to the variable “heading”. 

We have an issue with LSM6DSM and LSM6DSV. Sometimes they start consuming abnormally high current of 2.5 mA, which is about 200 times more than normal. Most reliably this can be reproduced when their SPI clock input pin 13 is driven by a week 47k pull-up / pull-down resistor.It seems that LSM6D becomes unstable and begins to oscillate. This happens when LSM6D is in any operation mode: in a full shutdown mode just after cold start, in a low power mode, any SPI speed, I2C disabled, etc.The reason why we drive SPI clock input by a week 47k pull down resistor is that LSM6D suppose to wake up the STM32L496RGT6 MCU from the shutdown mode. In the shutdown mode, the STM32L496RGT6 has only a week pull up/down option to drive its pins. But the voltage on the LSM6D SPI clock input pin 13 is about 7 mV and hence is well below the required logical 0 level. Documentation does not mention clock driver impednce and neither SPI nor I2C standards require low impedance input drivers

I am trying to use the DATALOG1_V1.1.0\Utilities\Python_SDKWhen I call the script hsdatalog_data_export I get an error: "No module named 'click'What to do to make these scrpits work? Pyhton is V3.7.8

Posted on October 16, 2016 at 11:59The LIS3DSH has a three channel 10 bit A/D converter but I can't find any information on it. What is the accuracy? (I could tie one channel to a voltage reference for calibration if necessary) What is the input voltage range? What is the maximum input current? (will I need to buffer the channels) #lis3dsh

Hi, community,   I have a bespoke board running an rp2040 and have been coding the LSM6DSO from the spec, along with using web-found python and cpp examples as starter code. There are several things I haven't found enough detail on and would like help.  1. if I read 2 byte temperature from the fifo data address, do I have to still read the full 6 bytes from the fifo data register and toss the 4 unused bytes, to keep the fifo syncronized with 6 byte data reads? Or can I read 2 for the temperature tag, then read 6 on the next gyro or acc tag? 2. how do I uncompress compressed data from the fifo? The only reference I could find leads to a dead URL. And same thing, if compressed, do I still need to read 6 bytes? Related to that, the driver cpp code on github seems to be empty, as if it was once there but was removed. 3. How do I decode the fifo timestamp info? thank you,   bob s

Hello,I am trying to get the temperature from LSM6DSVX sensor. Accel and gyro are working well but I can't get the temperature. The buffer cannot be enable for temperature. It works for Accel  and gyro buffer can be enable.their is something specific to do for the temperature ?  cmd line :echo 1 > /sys/bus/iio/devices/iio:device3/buffer/enablereturn : write error : invalid argument.

Hello Team ST and Community,I have following code for step count for our wrist-based device. We use LSM6DSO IMU.The step debounce threshold has improved the step count accuracy. It is currently set to 20. But, I could not get rid of the false positives. It also counts steps when I am typing on a keyboard and other minor movement when it exceeds step debounce threshold (e.g. typing more than 20 characters will start step count).I tried setting delta time period to mitigate this issue but it does not help a lot. Therefore, I have two question.1. Am I programming delta time period correctly? My understanding is that a step interrupt would be generated if a step movement happens between 256ms and 512ms as shown in the code. Please correct me if I wrong.2. How can I reduce false positives from minor movements? The false rejection advanced mode option is not that accurate to reject minor movement. Thank you,Aakash.&n

Hello, In general, I would like to better understand the relationship between the sampling frequencies of the FIFO and the Accelerometer (ISM330) and how to adjust them correctly for my application, could anyone give an example? In my case I have the following configuration:ISM330DLC_ACC_SetOutputDataRate(&MotionSensor, 26.0f)ISM330DLC_FIFO_Set_ODR_Value(&MotionSensor, 6660.0f)ISM330DLC_FIFO_ACC_Set_Decimation(&MotionSensor, ISM330DLC_FIFO_XL_DEC_32)That is, the ISM is sampling the accelerometer at 26Hz, the FIFO with decimation is configured to store at a sampling of approx. 208Hz (6660/32), which indicates that in 1 second the accelerometer saves 8 samples (208Hz/26Hz) from the accelerometer in the FIFO. Is this correct? For a practical application, for example, a motor with 1000RPM (1000/60=16Hz), would the frequency I need to adjust in the ISM330DLC_ACC_SetOutputDataRate function

Can someone help me how to use one interrupt pin for Activity/Inactivity and another for Free Fall detection? I need to use it in the lowest possible possible mode as my device is coin cell battery powered.Regards,Asish Banerjee

Hello,  I am trying to detect Single & Double tapping on LSM6DSL accelerometer. I am configuring the relevant registers as follows: CTRL1_XL=0x60TAP_CFG=0x8ETAP_THS_6D= 0x8INT_DUR2=0x45WUP_THS=0x80MD1_CFG=0x48 Every time I tap the accelerometer, and interrupt is generated and the I read the TAP_SRC register to identify the type of the type. The  X_TAP, Y_TAP and Z_TAP  bits are updated properly. But I NEVER get the SINGLE_TAP and DOUBLE_TAP bits set - They are always ZERO. Can someone please help me what am doing wrong? Thanks

I am trying to get the an values ready interrupt working, but I cannot seem to find the right configuration of registers. Normal threshold interrupts are working as expected.After the normal setup and using all different speeds ODR, when setting INT1_CTRL to INT_DRDY_XL active, I do not get any interrupts. The oscilloscope shows no change as well on either H_LACTIVE as well. Is there a sample that can be provided which has a working implementation of the interrupt working? So far all public sources have non working code. As an MCU I am using an ESP32 and Arduino.Here is my current initialisation:// Enable accelerometerwriteRegister(0x1F, 0x38); // CTRL_REG5_XL - Enable XYZ axeswriteRegister(0x20, 0x60); // CTRL_REG6_XL -

Hi,We are intending to use AIS2IH for one of our projects.We would like to change some settings while the device is running and see their effects on the performance/power consumption, in order to decide the best settings for our purpose.I would like to ask if we can change the below bitfields on the fly. If we can not, could you please provide the steps to change them correctly?CTRL1 register:ODRMODELP_MODECTRL6 register:FS (full scale selection)LOW_NOISEKind regards,Kerem

HiI'm trying to use two ISM330IS sensors both connected to the same external microcontroller.I want to synchronize accelerometer and gyroscope sampling (and the ISPU) to the processing cycle (1ms) of my controller.They should optimally both start the sample at the same time, triggered by a pulse from the microcontroller connected to both the sensors.I'm not 100% certain if this is actually possible. In AN5850 the INT2 pin is described like it may be used for this purpose (I²C master external synchronization signal (MDRDY)). It is described that this pin can be used to externally trigger sampling of the "sensor hub", which is a number of optionally connected I2C sensors. The description in section&nbsp

Hi,I'm working on a prototype of a device. One of this device features is to collect data from gyroscope, accelerometer and e-compass. It is very important that the device will be ultra-low-power. One goal for the prototype is to verify how much energy will that device consume.I have a question about components which I could use to build this prototype. I'm going to use STM32 NUCLEO-L432KC which will provide me ultra-low-power MCU. Is there any evaluation board with sensors (accel, gyro, e-compass) which I could connect to the Nucleo board?

Hello,I once compared your eCompass application (STM32F401RE/X-NUCEO-IKS01A3) with the compass on my smart phone.The compass on my smart phone behaves much better than the ECompass; it is not affected by rapid changes in the angle of inclination or by vibrations.What is the reason for this? Is it due to the sensors or the software?

HIWhen using the FIFO mode on the lsm6ds3tr-c sensor, there appears to be an issue where occasionally the pattern value read from the FIFO buffer is incorrect, leading to potential errors in the subsequent data retrieval process. This issue also results in the possibility of erroneous FIFO data being read.ERROR 1：00> <info> app: level: 18, read_level: 1800> <info> app: pattern: 0, index: 0, count: 213525, raw: -100> <info> app: pattern: 1, index: 1, count: 213526, raw: -200> <info> app: pattern: 2, index: 2, count: 213527, raw: 700> <info> app: pattern: 3, index: 3, count: 213528, raw: -11900> <info> app: patter

I am currently working on modifying the sampling rate for the LSM6DSO32G IMU sensor in a Samsung Android kernel. After reviewing the device tree and sensor driver files, I noticed that certain parameters like odr (output data rate) seem to control the sampling rate. However, I am not sure of the exact steps to apply these changes and ensure that the modified sampling rate is reflected correctly in the system.Here are my specific questions:Which files in the Samsung Android kernel should I modify to change the sampling rate for the LSM6DSO32G?Do I need to make changes in both the driver source code and the device tree, or is one sufficient?Is there a way to dynamically update the sampling rate (e.g., via sysfs or a similar interface) without rebuilding the kernel?Are there any specific steps or precautions I should take to test and validate the changes?Any guidance, code examples, or references to related documentation would

Posted on March 13, 2014 at 00:22I am interested in the LPS25H MEMS barometer chip, but I am having a hard time figuring out the footprint of the HCLGA-10L package. Here is what is called out in the datasheet: I cannot decipher from his what the dimensions of the pads should be.  I believe that e1/2 might give me the width, but I cannot determine the length.  Maybe that's what B is supposed to mean, but I don't see it. Also, I found that there is a

Hey Everyone,  I bought this sensorhttps://www.sparkfun.com/products/21325 and it is default to work as i2c. Which I do. I can read from this imu using regular polling, but I would like to use interrupts. But the issue is, interrupts to do not fire at all, I am not sure why. I am following the stm32 examples on githubhttps://github.com/STMicroelectronics/STMems_Standard_C_drivers/tree/master/lsm6dsv16x_STdC/examplesand I still have issues getting this sensor to work as an interrupt. Am I missing something? Do I need a pull down or pull up resistor on the interrupt pin? I worked with interrupts, theyre not difficult, but not sure wh

Hello everyone.I and my team are a bunch of BSc students in electrical engineering currently working on a gimbal project at our uni. My task is to prepare our IMU, the LSM6DSV16X by ST, for the readout of the game rotation vector so that we can get quaternions from it. The FIFO-Tag which should read 0x13 in the first five bits still reads 0x00, so there's apparently still no FIFO-Functionality enabled.I've used the ST-library found at https://github.com/STMicroelectronics/lsm6dsv16x-pid to implement the necessary functions and the platform_read and -_write funtions seem to work - I can send and receive signals and write to wr-registers and have the written bytes "stay there" as I've confirmed using oscilloscopes (measuring the MOSI and MISO signals alongside the clk and sc signals).The clk polarity is set to low and the clk phase to 1 Edge in the

I just bought the latest SensorTileBox (STEVAL-MKSBOX1V1) and it lost power and bluetooth connection, no LED lights. How do I restore it to its original firmware? The ST BLE Sensor app also doesn't have the create app option.

Hi all, I am working on the STEVAL-PROTEUS1 Board, which features the STM32WB5MMG module and the IIS3DWB high bandwidth accelerometer sensor interfaced via SPI_1. According to the IIS3DWB sensor datasheet, it supports up to 10MHz (CLK) and an ODR of 26667Hz (37 microseconds). My objective is to collect sensor data at an ODR of 26667Hz. Here are the steps I've taken so far: Configured SPI_1 to 8MHz. Configured the sensor to generate an ODR interrupt, which is successfully triggering every 37 microseconds. The issue arises when collecting data (6 bytes) from the sensor, which is taking 42 microseconds. Ideally, this should not exceed 10 microseconds using HAL functions. Could anyone help me understand if the HAL function is supposed to take 42 microseconds, or if I might be doing something wrong? Note: The M4 core is running at 64MHz and the M0 core at 32MHz. Thanks in advance!

Hello,section "4.5.1 Example of output data" of the LIS2DUX12 device application note (AN5909) provides an example of calculating the acceleration value from the FIFO.In the example 14 useful bytes from the FIFO are multiplied by the sensitivity in "mg/LSB":I think "LSB" in the sensitivity refers to the sixteenth bit of the FIFO word.Why aren't the raw values from the FIFO shifted right by two bytes (or divided by 4) before multiplication?

may i know lps22df temperature offset register?want to read the correct value at 25 degrees in the temperature chamber,but it seems to be read as an incorrect value. Please me, know if there are any other ways to compensate for the temperature

Hi,I am using MP34DT06JTR mic with my custom board with Micro-controller STM32U535CET6.I am unable to get the data form mic with my custom board. MIC schematic screen shot and Signal wave form of CLK and DATA screenshot given below.can you please verify this all.Yellow signal for CLK and Blue one is for Data.sample rate for audio data is 16Khz in software.