MEMS (sensors)

Hello, I'm using the STEVAL-MKI109V3 board in combination with STEVAL-MKI175V1 and trying to read the X, Y and Z values through the serial port using the commands described in the STEVAL-MKI109V3 documentation and I'm unable to see the Z axe value after running the *debug command:The initialization commands that I'm doing are:*setdb175v1*zoff*w206F*debugAnd then I start getting the data through th

Hi Sir/Mam,I am using LIS2DW12 accelerometer for wake-up detection. I can detect the wake-up event by reading theregister,and I set the wake-up recognition routed to INT1 pad,  but I do not see that an INT1 interrupt being raised.This is my configure.CTRL2 08   CTRL6 00  CTRL4 20   WAKE_UP_THS 01   WAKE_UP_DUR 00  CTRL1 50 CTRL7  20Can you please suggest a solution for this?Regardshdy

I'm trying to use ILPS28QSW as a water level sensor. For that I want to convert the pressure into mmH2O. In order to make that conversion as easy as possible I'd like to substract the atmosferic pressure. The datasheet shows that there are two registers "RPDS_L" and "RPDS_H" that are used in the "one point calibration", but the datasheet says "To give better flexibility to the user, the OPC value can be written twice in the same register map.". I don't know if that means that after being written two times it's not possible to write them ever again, if so I'd need another way because there is a chance that I need that calibration to be made multiple times. Maybe I'm misunderstanding what that sentence means, but as I don't know what type of non volatile memory is, I don't really understand how that memory works. I've seen the application note AN5778 but found nothing related to this topic. I've seen that there is a mode called "AUTOZERO" that makes more or les

Hi, I'm Working with H3LIS331DL Accelerometer and STM32F410 for vibration test(Levels:0.04 g^2/Hz,2O Hz to 2000 Hz All 3 Axis, 5 Minutes each axis) at SPI mode.I have readed the raw data from the H3LIS331DL and communicated it by  UART. But after that,I have no idea how to use my raw data for my project requirement,can someone help me with this.About,How the raw Data conversion has been done and about the different output units of Accelerometer(for example-g,mg/digit.m/s^2). Thanks in advance.

I am looking to interface with a sths34pf80 on a nucleo-f401re. I want to set up I2C to R/W to the registers and use the included functions.  BSP_I2C1_Init(); uint8_t ret=0; STHS34PF80_Object_t pObj; STHS34PF80_IO_t pIO; STHS34PF80_Init(&pObj); STHS34PF80_RegisterBusIO(&pObj, &pIO); if(STHS34PF80_ReadID(&pObj, &ret)==0){ //check status }  I have tried this above using the functions in sths34pf80.c/sths34pf80.h. Have not been able to get this to work. Any suggestions?Thanks

Hello,Who can send me few simple FSM state machine .fsm file example to load into the nico GUI ?BrJohann

Hello Ladies and Gents,I have following Problem with my App:The Scanrate from given Timer can be in min. 10ms. These ist f=1/0,010=100Hz. So If I configure the Lis2dh to normal or Highres Mode I have a f=1.344 KHz Anybody have an Idea how to increase/decrease the Scanrate to geht all the values of interval?Also I'm bind to USB and the Transactiondelay from max 500ms. Stv

I am looking to set up the STHS34PF80 on the STEVAL-MKI109V3 board. I have tried configuring the PresenceDetection mems application. I measured 0 current on jumper 13 and no voltage on STHS34PF80. Are there any tips or suggestions for setting up the STHS34PF80 mems sensor on the MKI109V3 eval board?Thanks

I'm currently using MEMS MP34DT06JTR audio sensor with STM32L431KBU6TR Mcu. I'm facing issue in receiving PDM data through SAI/I2S. I have connected one microphone to SAI Block-1 and the L/R pin is grounded. I'm attaching the main.c file and the configuration I used for SAI Block below for reference. Also I've attached sai_data.png which shows the result I'm getting currently.  

LIS3MDL issues.Issue #1 - There are two 8-bit registers for temperature, and the datasheet says it's two complement, but I don't see any further description of the contents. Is it fixed point 8.8 or is there some division or offset that needs to be done to get it into degrees Celsius?Issue #2 - I'm using I2C. When I read all the magnetic registers and the temperature registers (registers 0x28-0x2F) one byte at a time I get a set of magnetic and temperature readings. If I split it into an a 6-byte I2C operation to get the magnetic numbers (registers 0x28-0x2D) and a 2-byte I2C operation to get the temperature (registers 0x2E-0x2F), I get the same numbers, good so far. However, if I read those 8 registers in one I2C operation the temperature bytes come out the same as the X-axis magnetic bytes. If there some type of roll-over that I can't read the magnetic data and the temperature at the same time?

Hello,I am using the LSM6DSOWTR sensor in a wearable device for step counting.As it's known, the LSM6DSO series features an advanced pedometer, step detector, and step counter.I'm observing many steps counted even when the user is not moving (false positives), and I'm comparing the counted steps with other market wearables (twice as other devices).The False-Positive Rejection feature is enabled for better results (PEDO_CMD_REG).The Pedometer Debounce Threshold is set to 50 to avoid false step detections (PEDO_DEB_STEPS_CONF).Despite the high value of the debounce threshold, I have noticed that in resting situations where the user is stationary (e.g., during office work or sleeping), the IMU counts quite a few false positive steps.I have thoroughly read the

HelloWe use a LIS2DW12 accelerometer to mesure tilt over a temperature range from -25°C to +70°C.We set the full scale to 2g and chose High Performance mode with Low Noise enabled.We want an accuracy of 0.5°, but we're observing a drift of the order of 40 mg on measured accelerations as a function of temperature (from 15° to 75°C), resulting in a drift of more than 2° on the tilt measurement.We want to correct the accelerations as a function of temperature, and so we have the following questions.- Is the drift the same on all 3 axes?- The data sheet states that the 0g offset drift is 0.2mg/°C, but according to our measurements this is not linear. Is it normal ?- Does the drift depend on the orientation of the sensor ?- What law should be applied to correct the accelerations measured according to temperature ?You will find in the enclosed file, the shape of the deltas of accelerations versus the temperature (the reference

Hi guys,   I met a SPI communication issue about LIS331DL. The type of kit board is MKI153. When I tied VDDIO and VDD to 3.3V, the data from chip register by SPI isn't correct. When I only connect VDD to 3.3v, The data  is correct.     The register is WHO_AM_I and CTRL_REG1.      Tie vddio and vdd together:   WHO_AM_I register value = 0x20    CTRL_REG1 = 0x06    In this case: vddio & vdd = 3.3v    Only connect VDD:  WHO_AM_I register value = 0x32    CTRL_REG1 = 0x07    In this case: vdd = 3.3v.  vddio is around 2.5v (vddio pin is floating)    Pls see attached pictures. I can't understand this issue. Could you check it? Thanks!   

I am using STM32L452RE Nucleo Board and LIS25BA module.I2C works fine. I wish to get accelerometer data through TDM now. I am unable to do so. For now, I am using polling mode. The code I am using is given below and the SAI configuration I am using is also attached./* USER CODE BEGIN 2 */ int16_t rdat[8];  uint8_t chipid=0;  uint8_t cmax=0x7f;  uint8_t ctrlreg=0;  uint8_t tdmctrlreg=0x64;  uint8_t axesctrlreg=0xe0;  uint8_t rcmax; uint8_t rctrlreg; uint8_t rtdmctrlreg; uint8_t raxesctrlreg;  HAL_I2C_Mem_Read (&hi2c2, 0x33, 0x0f, 1, &chipid, 1, 100);  HAL_I2C_Mem_Write(&hi2c2, 0

Dear @Eleon BORLINI​ ,I’m currently using the I2S peripheral to acquire from a digital microphone.The I2S is configured as:24bits on 32bit data frame22kHz sampling frequencyand the pdm library is correctly configured and I’m able to convert a single sample (uint16 m) at a time and stream it. The pdm buffer is 16 (uint16) used as circular buffer by the dma.My question is where is the relation between the 24bits in 32bit data frame and the pcm converted sample, which is always on 16bits (uint16). Am I loosing precision in this way?I don’t see any difference in setting the i2s with 24/32 on 32bit data frame since I’m only obtaining 16bit pcm samples. is there some configuration that I’m missing? Could it be the pInternalMemory[…] variable in the pdm configuration struct?thanks a lot

初始化寄存器的参数配置SPI_write_reg(FIFO_CTRL4, 0x00);//fifo——mode// SPI_write_reg(INTERRUPTS_EN, 0x00);//interSPI_write_reg(CTRL3_C, 0x05); //high_act no_resetSPI_write_reg(CTRL1_XL, 0xA4); //full_scaleSPI_write_reg(CTRL3_C, 0x04); //high_act no_resetSPI_write_reg(CTRL4_C, 0x08|0x04); //drdy_1SPI_write_reg(CTRL5_C, 0x20); //xunhuan20SPI_write_reg(CTRL7_C, 0x02);SPI_write_reg(FIFO_CTRL2, 0x00); //81SPI_write_reg(FIFO_CTRL3, 0x0a); // fifo_rateSPI_write_reg(FIFO_CTRL4, 0x06);  //SPI_write_reg(WAKE_UP_DUR, 0x08);//0 du du thsw  sdu sdu sdu sduSPI_write_reg(WAKE_UP_THS, 0x02);//(lsb*32/256)0 wu 00 0000SPI_write_reg(SLOPE_EN, 0x20);//suocunSPI_write_reg(INTERRUPTS_EN, 0x80

Hi,I have STEVAL-MKI109v3 board and steval-mki186v1 sensor. I have connected the sensor to the board and if I connect the board to my laptop, the laptop is not able to detect the COM port of the board which is connected. It is not detecting the board in Unico-GUI also. If I connect the board the power led (D6) is ON and also the D1 LED (green LED) is blinking. But it is not detecting in my laptop. My laptop currently runs on Windows 10. I also tried installing the driver on a windows 7 laptop and tried connecting the board but still the same. Please help !

Hello ,I followed this tutorial for lsm6dsv16x.However, I cannot see StMicroelectronics Virtual COM Port after downloading STSW-LINK009. Besides, I could not match dfuse devices  

Use the cubeProgram tool to burn the MPU, whether the USB of the MPU must use USB-OTG mode? 

I am using a LIS3DH and I have configured a threshold interruption and it is consuming around 3mA while the interrupt is active. I have very strict power constraints and this consumption make it unreliable.I am using the driver implemented in Zephyr and it have all configuration from the interrupt exactly as advised in the datasheet, the INTx_SRC is read after a interrupt to clear it and the interrupt is cleared, although the interrupt only is pulled down after a new sample. It is possible to be noticed in the attached file that it takes around 20 ms to put the interrupt to 0. It matches with the sampling period that is 20ms (freq 50Hz).Why does LIS3DH consumes so much power for keeping the interrupt ON? And is it right to be waiting a new sample to be able to turn down the interrupt?Is it a problem from LIS3DH or am I missing some config?Best regards

Hi, I purchased the SensorTile.box PRO sensor, but I can't develop because it doesn't connect to the STLINK V2-1, in the datasheet it says:I connect adapter STEVALMK1 (that was inside the kit) with STLINK V2-1But I have the following error  the documentation is really bland  

Posted on December 04, 2017 at 08:07Good day allMy LIS2DH12  seems to lock up or stops responding, it is connected to STM32L152 which is set to go into STOPMODE and wakes on interrupt. An I/O pin is configured as an  external interrupt and connected to INT1 of the LIS2DH12. When the LIS2DH12 is Tilted the interrupt wakes up the processor and a buzzer sounds.I have build 15 units and they all seem to randomly stop working. Some of the units run 1-5minutes before it locks up and the interrupt pin stops toggling when moved,  a few units will run a few hours, others may run 2-3 days. but eventually they all lock up. At this stage i am uncertain if its hardware or software. My setup code is as follows (included are also other setups I have tried while i was experimenting ). To my understanding, once the LIS2DH12 is setup it should toggle the interrupt as long as power is applied to the chip irresp

I'm using STEVAL-STWINKT1 (MCU STM32L4R9ZIJ6) and I'm trying to communicate with the motion sensors (ISM330DHCX, IIS3DWB, IIS2DH) by SPI3 interface (polling). I wrote a code very similar to that one present in the "Serial_DataLog" project, using HALs (I'm using STM32CubeIDE and STM32CubeMX generated code). I'm trying to get the WHO_AM_I value from register address 0x0F, but my code gives me cyclically a wrong value every time I call this function.Here it is my code:- in main.cstatic void MX_SPI3_Init(void) {   /* USER CODE BEGIN SPI3_Init 0 */   /* USER CODE END SPI3_Init 0 */   /* USER CODE BEGIN SPI3_Init 1 */   /* USER CODE END SPI3_Init 1 */ /* SPI3 parameter configuration*/ hspi3.Instance = SPI3; hspi3.Init.Mode = SPI_MODE_MASTER; hspi3.Init.Direction = SPI_DIRECTION_2LINES; hspi3.Init.DataSize = SPI_DATASIZE_8BIT; hspi3.Init.CLKPolarity = SPI_POLARITY_HIGH; hspi3.Init.CLKPhase = SPI_PHASE_2EDGE; hspi3.Init.NSS

I am successfully running with four FSMs and the SFLP as well as many of the embedded functions like tilt detect and activity/inactivity detect. For the latter, I have tested using SLPMODE3 where the accel is placed in LP1 mode at 1.875 Hz and the gyro is powered down.  What happens to the FSM and SFLP when the gyro is powered down (at least one of the FSM require gyro data) or the accel ODR is well below the specified SFLP ODR (15 Hz) or FSM ODRs (30 Hz)?I find that the program works as expected. That is, I see interrupts for the FSM programs and I see quaternion data from the SFLP when active. When inactive I do not, as expected. And then again, when activity resume, I see the expected behavior (SFLP quaternions and FSM interrupts). So do I not have to explicitly de-activate the FSM programs or SFLP? Is this handled automagically somehow?I ask partl

Hello, I have received the STEVAL-STWINBX1 evaluation kit and am trying different demos to see how it works. At first I was programming the board with different examples (STM32CubeFunctionPack_STBOX1_V1.5.0) but I was having problems afterwards. Once the programming was done, I was trying to connect to the board via BLE Sensor App but my board didn't appear until I pressed RESET. Then, I read an issue on this community where a user was having a similar problem and the solution was to program the binary file on Bank 2 (Start address: 0x08100000). The problem still persists but now, once I connect the board to my computer, the computer doesn't detect it and the only LED blinking is LED_C. I don't know what to do, because I can't reset the board and I can't connect it to the computer either to program it again... Any suggestions?