MEMS (sensors)

Posted on February 23, 2018 at 16:00Hi,I'm trying to use the MotionFX library with the LSM9DS1. I can initialise the library and I start to send updates using the MotionFX_MagCal_run method then I get the params with MotionFX_MagCal_getParams but the cal_quality is always 0, I tried multiple times. Also, I double checked that I set the sample time and timestamp correctly.Not sure what I'm missing, is there any way to debug the behaviour of the library?Regards,Gabriel

​I am working with STEVAL-MKI109V3 and STEVAL-MKI180V1 (Lis3d). After finally getting the drivers and firmware etc. sorted so that the device is recognised by Unico, it seems now that Unico is not showing the complete set of tools: in particular I am missing the interrupt tool. Any ideas on how to get this to show up? I am attaching a screenshot of my Unico - note that the interrupt (and some other tools) are missing on the left hand side. Unico GUI Version 7.0.0.0Firmware Version V2.30.3

Dear all, we have a problem with IIS2DH, in particulary the sampling rate is not the same chip by chip mounted on our PCB board. What is the issue? When we read with an oscilloscope the frequency on various board there is a shift of about 700Hz between many IIS2DH. For example we sample in Low Power Mode at 5376 Hz and when we read it with the oscilloscope we read 5556Hz in one PCB Board where is mounted the IIS2DH and in another board 4861Hz;Could you please give me some answer, because it is very urgent for our project because next week will start the production.ThanksLorenzo

Hi ,I got a doubt in stream mode in LIS3DSH, if we are using stream mode , if you read the FIFO buffer when it is filled with only 20 samples of 32 ,next sample will be stored in 21 st index of buffer or 0th index of FIFO buffer ???Thanks for your support,Regards,Chaitanya

Hello,these days i tested the pressure sensor lps22hb,the pressure measured is 43 hpa lower than it should,that is it show 970 hpa while it should show 1013 hpa.Have to do one point calibration (OPC)?Can you help me??

Hi,We are working on I.MX8 processor family to interface iNEMO INERTIAL MODULE(LSM6DS33TR).We are getting two devices's o/p correclty i.e Gyroscope and Accelerometer.But we are not able to get any output from temprature sensor.From current debugging found that it needs to read below registers (?!)OUT_TEMP_L   0x20   OUT_TEMP_H   0x21But still not getting any o/p.So in above case is there any suggestion ?Regards,Arjun

Posted on February 19, 2018 at 07:51I want to use LIS2D for FIFO and tap interrupt. Its generating FIFO interrupt but I am not able to get single tap interrupt.My register settings are as below. I want my FIFO interrupt of INT1 and Tap interrupt on INT2. Please suggest where I am going wrong.CTRL_REG1 : 0x37CTRL_REG2 : 0x00CTRL_REG3 : 0x04CTRL_REG4 : 0x10CTRL_REG5 : 0x40CTRL_REG6 : 0xA0CLICK_CFG : 0x15Thanks.

Hi All. I want to configure the filter in such a way that the data in the out registers are not filtered, and the data for interrupt AOI are filtered. But I have filtered data in both the interrupt and the output registers.My settings of filter: AX_Write (0x21, 0xC1);Whats wrong?

Hi.We are trying to configure lsm6dsl to catch peak shock. The usecase is that the sensor should sleep until shock occurs (say above 1g on any axis), cause interrupt and have the value available in FIFO. We are using the STMems_Standard_C_drivers from ST as base. We are using I2C for the communication.My configuration: lsm6dsl_device_id_get(&dev_ctx, &whoamI);   lsm6dsl_reset_set(&dev_ctx, PROPERTY_ENABLE);   do {   lsm6dsl_reset_get(&dev_ctx, &rst);   } while (rst);   /*   * Set Output Data Rate   */   lsm6dsl_xl_data_rate_set(&dev_ctx, LSM6DSL_XL_ODR_416Hz); //   /*   * Set full scale   */   lsm6dsl_xl_full_scale_set(&dev_ctx, LSM6DSL_4g);   lsm6dsl_wkup_threshold_set(&dev_ctx, 4);   routing2.int2_wu = 1;   delay_ms(4); /* per ST AN5040*/     lsm6dsl_pin_int2_route_set(&dev_ctx, routing2);    

Dear Community,​I've been using the MotionMC library on a stm32f401 with quite some succes, but there are 2 functions that remain somewhat mysterious:char MotionMC_LoadCalFromNVM(unsigned short int datasize, unsigned int *data);andchar MotionMC_SaveCalInNVM(unsigned short int datasize, unsigned int *data);​These functions are used for reading/writing calibration data from/to non-volatile memory (NVM), that much is clear. But there is no real documentation available, and I found no actual implementation examples. I can just implement something that writes/ reads the data, but I have been trying to figure out how they function with library, and that raised a question. ​The first function tries to load the data from NVM, and gets called during initialization, but I haven't seen the library ever call the save function to write the data. Not even after the calibration quality goes to MMC_CALQSTATUSGOOD. ​So: whe

I need a suitable sensor to pick up high frequency vibration signals

I assembled the ISM330DLC on an PCBA together with an IIS2MDC in Mode 2 -> ISM330 connected to an MCU by 4-wire SPI / IIS2MDC connected to the I2C interface od the ISM330 / DRDY of IIS2MDC connected to INT2 of ISM330

The register CTRL_REG1_A is set with 0x57 and CTRL_REG4_A with 0x80.All output Accelerometer registers give the same value 0xC0.What is missing for correct accelerometer measurements?

I am using STM32Cube_FW_F4_V1.21.0.This is very excellent software.UART,SPI,I2S,RTC,,,work fine but HS-IN-FS.I have checked HS and FS works fine.My target board is STM32469I-EVAL board and I'm using EWARM compiler suite.My application is USB_Device/MSC_Standalone.(I used HS-IN-FS workspace file so USE_USB_HS and USE_USB_HS_IN_FS are defined properly)I run without any change,I can built program without an error.I downloaded and executed.and program reached while(1).I connected USB cable to (CN14) but windows explore was not able to find mass strage device.USB related registers were set below.GOTGCTL= 3010000GOTGINT=100000GAHBCFG=  1GUSBCFG=40001440GRSTCTL=80000000GINTSTS= 4008020GINTMSK=c03c3814GRXSTSR=      0GRXSTSP=      0GRXFSIZ=    200DIEPTXF0_HNPTXFSIZ=

I bought vl53l0x sensor in mouser.I designed in my sensor board for my project. I refered in datasheet circuit.I added my board schematics.İn addition to ı constructed to ı2c level shifter with mosfet for the arduino communication but i did not answer in board. It is not accessed sensor. I take just 65535 failed message.In the user manuel standart mode ı2c voltage is 1v8.I tried 3v3 with arduino board.I success communucation with polulu vl53l0x board but ı failed my board.How can i solve these problem?How can i adjust sensor for communication?website in sensor : https://www.st.com/en/imaging-and-photonics-solutions/vl53l0x.html

On my custom board LIS3DH is supplied with Vdd = Vdd_IO = 3.3 V and is driven through I2C digital interface.On power-on LIS3DH, after its boot sequence (5 ms) should be automatically configured in power-down mode with a current consumption less then 1 uA. But on my custom board, with no I2C driver action, I measure IddPdn = 310 uA after power-on.If I set power-down mode (i.e. ODR = 0, LPen = 0) through I2C driver, then I measure IddPdn = 150 uA.If a set the operative ODR and FS, I properly read the acceleration data.In some conditions I need to disable the sensor to minimize the current consumption of my system.So, what is the correct sequence to make LIS3DH enter in power-down mode?

Hi All,I am working on a project that is using ISM330DLC sensor for measuring the acceleration along the X,Y and Z-axis. When I set range 2G,4G and 8G I'm seeing difference in the sensor raw value and when I set it to 16G, I'm getting same data as 8G.eg: Z-axis data:2G : 1030 4G : 5178G : 25816 : 256  Regards, Dom

Hello,I want to use edge-sensitive trigger mode to synchronize multiple sensors. In the code snippet you can see the relevant code for that. The FIFO buffer doesn't get filled, even though I have a PWM as trigger on the INT2 pin. The low-pass filter LPF2 is disabled. Any ideas?lsm6dsl_fifo_xl_batch_set(&dev_ctx, LSM6DSL_FIFO_XL_NO_DEC); // no decimation lsm6dsl_fifo_gy_batch_set(&dev_ctx, LSM6DSL_FIFO_GY_NO_DEC); // no decimation /* FIFO ODR has to be equal or lower than accel and gyro odr */ /* F(odr) = MIN ( MAX(ODR_XL, ODR_G), ODR_FIFO ) */ lsm6dsl_fifo_data_rate_set(&dev_ctx, LSM6DSL_FIFO_833Hz); lsm6dsl_fifo_watermark_set(&dev_ctx, PL_CONFIG_FIFO_FTH); lsm6dsl_fifo_mode_set(&dev_ctx, LSM6DSL_STREAM_MODE); /* Enable Edge-Sensitive Trigger Mode */ #if PL_CONFIG_HAS_EDGE_TRIGGER lsm6dsl_den_polarity_set(&dev_ctx, LSM6DSL_DEN_ACT_HIGH); lsm6dsl_sh_syncro_mode_set(&dev_ctx, LSM6DSL_EXT_ON_INT2_PIN); lsm6dsl_fifo_write_trigg

Hello,We are developing a product that has some circuitry permanently powered inside a sealed enclosure.We need to determine if we need a load switch for the host processor to cycle power to the LIS2DH12TR MEMs chip in the event that the MEMs chip locks up (where the I2C bus does not work).Since the chip has no reset line, can ST confirm that there is no risk that this chip will lock up to the point that the I2C does not work, so there is no risk of ever having a bricked device that we cannot reset if we don’t cycle the power to the device?Thank you.

Hi togetherI'm working on a project for my study. I want to program a VL53L1X sensor. And I want to do it with I2C and setting different Register. But I can’t find a datasheet with all the registers.Can someone help me?

Hi everyone,I am using a LSM9DS1 and the official driver: https://github.com/STMicroelectronics/STMems_Linux_Input_drivers/tree/linux-3.10.y-gh/drivers/input/misc/st/imu/lsm9ds1I have detected that occasionally the driver fails during the boot time:If everything goes fine:

Hello,Even though I have set the LIR bit to 1, the interrupts aren't latched. In the picture you can clearly see that the interrupt is reset before reading the route register of interrupt 1. The LIR bit is definitely set to 1. I have checked this with lsm6dsl_int_notification_get. Routed to the interrupt 1 is the fifo treshold only. What could be the problem?Kind regardsCyrill

The datasheet pin description table Function column simply states “Connect to GND�?. Every other pin in the table has their function described, but “Connect to GND�? says nothing about its function. Is this a reset pin (active high)? If so, can it be used connected directly to a microcontroller, so we can force a hard reset of the chip?There is also nothing about it in the application notes.So, what is the function of this pin?Any help, greatly appreciated

Status: I have interfaced LSM6DSL with STM32L476. It is working ok. I,am able to get Acceleration along all the axis and also able to compute Roll and Pitch with Gyro and Acc reading fused in Complementary Filter.Problem Can anybody suggest a method for Obtaining stable YAW value. I don't intend to use Magnetometer. Although i have a GPS.Application Area I want to implement Dead Reckoning for vehicles.Thanks in advance for the Help.

Posted on June 24, 2014 at 09:48Does the VL6180X work under water ? A. #vl6180x #proximity-sensor