MEMS (sensors)

In my STM32 Discovery L4 board I have inertial MEMS sensors L3GD20 gyroscope and LSM303C e-compass (accelerometer+magnotemeter), all of them with different Output Data Rate, by default in BSP 95 Hz, 50 Hz, 40 Hz respectively.In order to make a sensor fusion, how must to adjust a periodic timer to take correct samples?Thanks in advance.

Hallo to All,we would like to put the ISM330DLC into a new product in developing, in order to evaluate in REAL TIME the overall vibrations in order to keep the operator in the SAFE OPERATING AREA.The tool is an electrical manual tool, an orbital sander.We are currently evaluating many accelerometer using UNICO FFT analysis, and we would like to evaluate the performances of the ISM330DLC, but unfortunately the FW inside the eval does not support this device.do you know if there is any chance to update the FW in order to make the adapter working with ISM330DLC mounted on MK182V2.Thank you very much for your attentionBRFabio

Open On-Chip Debugger 0.10.0+dev-00021-g524e8c8 (2019-04-12-08:48) Licensed under GNU GPL v2 For bug reports, read http://openocd.org/doc/doxygen/bugs.html srst_only separate srst_nogate srst_open_drain connect_assert_srst Info : The selected transport took over low-level target control. The results might differ compared to plain JTAG/SWD padded zone erase set to 1 adapter speed: 4000 kHz adapter_nsrst_delay: 100 Info : clock speed 4000 kHz Info : STLINK v2.1 JTAG v29 API v2 M18 VID 0x0483 PID 0x374B Info : using stlink api v2 Info : Target voltage: 3.231916 Info : Stlink adapter speed set to 4000 kHz Info : STM32L476RGTx.cpu: hardware has 6 breakpoints, 4 watchpoints Info : Listening on port 3333 for gdb connections target halted due to debug-request, current mode: Thread xPSR: 0x01000000 pc: 0x00010100 msp: 0x464c457c Info : Stlink adapter speed set to 4000 kHz a

Hi, do you have data and information about infrasound characteristics of MP34DT06J ? I looked at its frequency response in the data sheet, but information is being plotted starting from 100 Hz only. I'm using the CCA02M2 board.Many thanks!

I am using STSW-STLKT01_V2.1.1 package Datalog project to program the sensortile. It works perfectly at 200Hz logging acc+ gyro+ Magnetometer data. I disabled all other sensors. However, if I increase the logging frequency to 500 Hz, it work for 5 seconds and shut down automatically. Does anybody know why?

Hello,Trying to enter in DFU mode with the STM32CubeProg tool I get an unknown USB device error whenever I connect the SensorTile.box to my computer.The installation of the STM32CubeProg tool included the ST-LINK drivers and the usbser port driver package.I ran STM32Bootloader.bat but it seems to fail since the SensorTile.box is still not recognized. I have also tried to install the DFU Drivers manually to no avail.Any help would be appreciated.Regards

Hello, we're using A3G4250D in our project, and get data from it successfully in the stream mode, but, it accured, that from time to time there are random steps in the output data, and we have no clue on what can cause them. Did anyone meet such issue, can you help with the solution, please, if there is one.The schematic and output graph are attached to visualize the problem

 According to the datasheet: "Reference value for interrupt generation.". Is this intended to be used to subtract off say gravity or some other constant value? Is this a scalar value applied to all three dimensions?

in the datasheet in section 3.1, it is mentioned to leave "pin 1 indicator" unconnected during soldering. Can this be clarified? Pin 1 is a functional pin and is always connected for a clock signal. How can we use this device if it is not allowed to connect the pin when soldering?

I am testing IIS2DLPC wake up feature for interrupt generation. When i want to use the wake up feature with high pass filter data instead of offset. Should i enable FDS bit in CTRL6? It is not clear that in the description of the wake up feature. What does it mean by high pass filter data when there is no setting to select high pass filter data path. Thank you in advance!

Hello,I use the accelerometer LSM6DSOX. I want to get an interruption when the norm is above 8g. So I try to use the FSM and configure it. When I flash (for the first time) the system, everything works perfect ! But when I remove my battery and put it again (restart the device), the FSM interrupt do not work anymore (also if I flash again , it still not work) ... I really don't understand where is my mistake ... I followed exactly your AN_FSM doc.I tried on 2 different prototype, same problem, so it must be software. Here is the configuration of FSM and Accel (In my main I first call FSM_config and then Accel_config). I just give you the value I write in which register adress : So first I call FSM_CONFIG : (address / data)0x10 / 0x00 turn off accel 0x11 / 0x00 turn off gyro 0x01 / 0x80 enable access to embedded function register0x05 / 0x01 Enable FSM0x5F / 0x4B FSM odr = 26Hz0x46 / 0x01 Enable FSM1 0

I have seen that this query has been asked previously but there was no answer to it.Therefore, I am raising the issue again here as follows: Currently, I am using INT1 for free fall detection which is already outlined in the AN3308 application note. Together with this, I would like to use INT2 pin for shock detection.So my question is what would be the sequence of settings to correctly configure LIS3DH INT2 for doing so. For shock detection, the idea is to do an interrupt where X || Y || Z (Logical OR) have a large acceleration signal for a certain amount of time (let's say over 5 or 10s).Some parameter values would be really helpful for starter.Thanks....

Not sure if this belongs to the forum or whether I should better file a support request.I'm referring to revision 5 of the datasheet of LIS2HH12.On page 33, table 27, the function of the DFC bits are misrepresented as a high-pass cutoff frequency instead of cutoff frequency for two filters, the low-pass filter (whose bypass is controlled by CTRL1.HR) as well as the high-pass filter (whose effects are controlled by CTRL2.FDS/HPIS1/HPIS2). Also, a reference to table 25 is missing. A table for the high-pass cutoff frequencies is completely missing (AN4662 provides this information in table 11, p.16).Also, in the same table, DFC is misspelled as DFC1 in the left column.One should also be aware of AN4662 which does an excellent job in explaining the whole data path signal processing, including block diagrams.

I'm doing a final project with the STEVAL-MKSBOX1V1. I need to read temperature and sleep the tile box for a long period to save batery. I've never worked with MCUs, only with computers. Someone kwnows where I can find information about how to do it?

Hi,I'm trying to get an IIS3DWB up and running. If I read the register "WHO_AM_I", however, I only get "0" back! The SDO signal changes from "1" to "0" after 8 clk cycles and only changes again when CS becomes high.The IIS3DWB data sheet does not contain much information regarding the SPI interface.STM32 SPI config:Motorola frame formatMSB FirstBaud rate = 2.6MBit / sCPOL = highCPHA = 2 edgePull-up on4-WireCan someone give me a hint what the problem could be?greetingsFlorian

Hi, As stated in question, accelerometer vector magnitudes are different when sensors are oriented to +X axis and - X axis. Difference is about 5 %. DT0105 only states about +X axis calibration. so I'm confused whether this difference comes from chip itself, or installation.

When configuring function routing on INT1/INT2 register (MD1_CFG/MD2_CFG), there is a note that says; "Activity/Inactivity interrupt mode (sleep change or sleep status) depends on the SLEEP_STATUS_ON_INT bit in SLOPE_EN (56h) register.But the SLOPE_EN register only have one bit in the driver library which is "SLOPE_FDS". Where is the SLEEP_STATUS_ON_INT bit?

Hello, I'm trying to measure a few things unsing the SensorTile.box. Sometimes everything works fine but then the SensorTile.box seems to be dead all of a sudden. When I then try to connect it to my Windows pc, the pc won't recognise it and my phone can't find it via bluetooth either. If I then disconnect the battery for a few seconds, reconnect it again and connect the SensorTile.box to the pc it starts charching and everthing works properly till it crashes again.I don't think that this is a battery problem because when it's working it shows more than 3.3 V via bluetooth and I'm charging it whenever I'm not measuring. I haven't updated the firmware and just used the app to start and stop data logging. Then I transferred the measurement data to my pc with the USB-cable.

This is my TestSD_C.ns file:#define NEW_PRINTF_SEMANTICS#include "printf.h"#include "FatFs.h"configuration TestSD_C {}implementation { components MainC, TestSD_P; TestSD_P -> MainC.Boot; components FatFsP, diskIOC; TestSD_P.FatFs -> FatFsP; FatFsP.diskIO -> diskIOC; FatFsP.diskIOStdControl -> diskIOC; components new TimerMilliC() as Timer; TestSD_P.Timer -> Timer; components PrintfC, SerialStartC;}This is my SDTest_P.ns file:#include "FatFs.h"#include "Timer.h"#include "printf.h"module TestSD_P { uses { interface Boot; interface FatFs; interface Timer<TMilli> as Timer; }}implementation{ FATFS fs; FIL fp; uint8_t mount; uint8_t open; void printErr

It is always 0 to get the value of OUT_TEMP_L_A (0Ch), OUT_TEMP_H_A (0Dh).Before reading OUT_TEMP_L_A (0Ch), OUT_TEMP_H_A (0Dh), check the values of TEMP_CFG_REG_A (1Fh), CTRL_REG4_A (23h) and STATUS_REG_AUX_A (07h) as bellow:TEMP_CFG_REG_A (1Fh): 0xC7CTRL_REG4_A (23h): 0x80STATUS_REG_AUX_A (07h): 0xFF

Hi,I have used the STMicro's Unicleo-GUI PC Application to test both the LSM9DS1 STMicro's HAL and STMicro's Compass Middle Ware (from X-CUBE-MEMS1) - and - the LSM6DSO-LIS2MDL combination using almost the same software. All STMicro code (HAL for the LSM9DS1, LSM6DSO & LIS2MDL) and our code worked together well to provide the STMicro's Unicleo-GUI PC Application data to display graphically.Since then I have ported all code from an STMicro's NUCLEO board (using an STM32L412 processor) to our target platform (using the same STM32L412 processor). This caused the USB interface to change from the built in USB on the STMicro's NUCLEO development board to the STMicro's ST-LINK in-circuit debugger and programmer pod.It would appear this switch has broken STMicro's Unicleo-GUI PC Application. The STMicro's Unicleo-GUI PC Application no longer finds and advertises a suitable Win10 Comm Port to connect to. Where as before the STMicro's Unicleo-GUI

I'm testing the LPS22HH on the MKI192-V1 eval board. At normal atmospheric pressure it reports about 1013 hPa, which is what I expect, and it fluctuates over time by a few hPa. It also reports a reasonable temperature value, so I know the I2C interface is working ok. But when I put it in a pressure chamber and adjust the pressure over the sensor's operating range, it still reports about the same pressure within a few hPa even though the actual pressure has changed by several hundred hPa. So it's not responding to pressure changes. I tried this on two samples and got similar results. Has anyone had a similar problem ? Are these sensors damaged or am I missing something ?

I'm working on selecting between ISM330DHCX and LSM6DSM for some products under development. The one key sensor specification I can't find the data sheets is Typical Gyro/Accelerometer Nonlinearity (Best-fit straight Line) (% of FS). Can anyone point me to these specifications?

Hi Is there a way to perform a factory reset for SensorTile? For some reason, my laptop can't detect it anymore. Device manager said "This device cannot start. (Code 10). A device which does not exist was specified." I try to erase full chip flash memory and plan to load the original bootloader, but I also get error message in CubeProgrammer"Error: Invalid port name: No DFU detEstablishing connection with the device failed" Pressing the root button doesn't seem to help. I first tried to press the button after connecting to a laptop, but it didn't help. I also tried to hold the root button and release it after connecting to the laptop, but it also didn't help. May I know what I am missing?Thanks,Dennis

Here the link to the quiz --> LINKThis Quiz, prepared by Element14 technicians and reviewed by ST experts, asks questions about your knowledge of MEMS technology, fabrication, applications, as well as some specific questions about MEMS technology by STMicroelectronics. If you score 100%, Element14 will send you a prize!