MEMS (sensors)

Posted on September 07, 2013 at 18:12Other than zero-rate and sensitivity are there any other calibrations that need to be performed on the L3GD20? #l3gd20 #l3gd20 #calibration

Posted on September 07, 2013 at 18:13Does the L3GD20 have FIFO empty interrupt available? #fifo #l3gd20

Posted on September 07, 2013 at 18:21What is an iNEMO module? What is iNEMO_M1? #inemo #module

Posted on September 07, 2013 at 17:34What should I do with the 3 ADC input pins of the LIS3DH if not used? #lis3dh #motion-sensor #accelerometer #accelerometer

Posted on September 07, 2013 at 17:36Other than offset and sensitivity are there any other calibrations that need to be performed on the LIS3DH? #accelerometer #motion-sensor #lis3dh #lis3dh

Posted on September 07, 2013 at 17:38The LIS3DH datasheet shows factory calibration parameters at Vdd = 2.5V. What if I use 1.8V, 3V or 3.3V Vdd? #accelerometer #lis3dh #lis3dh #accelerometer

Posted on September 07, 2013 at 17:38Does the LIS3DH have 96 levels of 16-bit data for FIFO? #fifo #accelerometer #lis3dh #accelerometer #lis3dh

Posted on September 07, 2013 at 18:04Does the LIS3DH have FIFO empty interrupt available? #motion-sensor #accelerometer #lis3dh #fifo #lis3dh

Posted on September 07, 2013 at 18:05When the LIS3DH FIFO is enabled, reading 6-byte data registers again and again will make the FIFO pop data automatically. How about only reading three high bytes OUT_X_H, OUT_Y_H and OUT_Z_H? #motion-sensor #fifo #accelerometer #lis3dh

Posted on September 07, 2013 at 18:07Is there FIFO in the H3LIS331DL accelerometer? #accelerometer #low-power #motion-sensor #h3lis331dl #high-g #digital

Posted on August 22, 2013 at 00:23I'm using a LPS331 in a prototype. The datasheet does not give any timing information other than one can select the output data rate. What are the timing values for SPI such as max clocking frequency, etc. I search ST site and could not find any other information that would help. For I2C it says it complies with fast mode (400kHz) but nothing for SPI. Thanks, Tom #mems-barometer

Posted on August 22, 2013 at 10:37Currently I' m using start(0,50,0) command for the iNEMO2v to get 50Hz, I want to increase the sampling frequency to at least 100Hz but just changing it to start(0,100,0) does not seem to do the trick. Any suggestions?Thanks

Posted on August 10, 2013 at 20:28Hi All. I got problems getting contact to the gyro in the LSM330DLC chip - no ACK from gyro. The accelerometer works just fine.Adress for Accelerometer: 0x32 and Gyro: 0xD6Can someone tell me what's wrong:

Posted on August 09, 2013 at 00:44I have the STEVAL-MK1062V2  eval kit and I see the Visual C++ SDK.  Is there an android and iPhone equivalent as well?  How does one get these boards to talk to non windows computers, say a MAC? Thanks

Posted on August 09, 2013 at 00:42I want to be able to collect the MEMS sensor information (exactly the way the iNemo demo application does), but I want to collect it into my own software running on the board and use my own mechanism to transmit it to the computer via USB. How do I do this?  Is there a way to compile a C program for the board and download and run it on the board?  Is there an SDK for this?

Posted on February 25, 2011 at 17:44Dear All, The Suite 2.2.0 and related SDK are now available on http://www.st.com/inemo Version 2.2.0 support now: § Sensors Registers Settings (only for iNEMO V2) § Integrated Firmware upgrading (only for iNEMO V2) § New SDK 1.6.4 for iNEMO V2: support Registers Settings and allow      introduction of Customized Commands Best Regards iNEMOâ„¢ Team

Posted on July 09, 2013 at 07:17Hello, I'm very green when it comes to sensors and MCU. I'm tasked with implementing the INEMO v2 board to work with LabView independent of the INEMO GUI. Is this possible? How difficult will it be? Where should I start? Thank You #labview #inemo

Posted on November 21, 2012 at 12:22Hello, where i can download detail information abour LIS3DSH state programming ? #lis3dsh

Posted on June 24, 2013 at 19:58Hi,   I am trying to configure LIS3DH in FIFO/Stream mode and have a few questions as the data sheet is not very clear.1) Can I configure the INT2 as the WaterMark interrupt?  I don't see any option to configure INT2 as the interrupt in the register bits, although the spec seems to imply it is possible.  Our hardware has the INT2 pin connected to a GPIO, hence would like to know if configuring INT2 as the watermark interrupt is an option.2) Since I couldn't configure INT2, I went with polling the WTM bit of FIFO_SRC_REG to see if the watermark threshold level has reached (assuming WTM bit is the place to look for).  However, whenever I read FIFO_SRC_REG it comes out as 0.  I have enabled the FIFO in CTRL_REG5 (bit 6) and set the mode in FIFO_CTRL_REG.  What am I missing? Also, FIFO_SRC_REG doesn't have any explanation on what the reg bits mean.

Posted on June 24, 2013 at 18:40I have a design with the LSM303D e-Compass and 3D accelerometer.  When we calibrate the accelerometer, we are frequently seeing zero-g level offset corrections greater than the +/-60 milli-g typical value specified in the datasheet.Most assemblies that we calibrate are coming in around +/-60 milli-g in the X and Y directions, but we sometimes see numbers in excess of +/-120 milli-g in the Z direction.  Is the +/-60 milli-g specification intended to be a +/-1-sigma range?  +/-2-sigma?  Some other range?In the design, the part operates with a 3.0V supply.  How might one expect the offset accuracy to change with a 20% change from the nominal supply voltage? #lsm303d-accelerometer-offset

Posted on June 09, 2013 at 13:01Hi,I've been using an STM32F4 Discovery board with uVision4 for around 10 months now, and have learnt how to use the basic features (ADC, LCD, USART etc) and I'm now tackling the accelerometer (LIS302DL). I've looked at various examples from the net including the one(s) supplied by ST, however I always seem to get a HardFault Exception before main code is even reached! I've researched this HardFault error and tried to work my way around it, to no success. The Fault Report has NOCP ticked in the Usage Faults box and FORCED in the Hard Faults box.I've reloaded previous projects and they work fine. So it seems to be a problem whenever I try to write code relating to the accelerometer.Could someone please help me out? All I want to do is read from the accelerometer, and not encounter the HardFault Exception.ThanksTom #accelerometer #lis302dl #stm32f4

Posted on June 07, 2013 at 08:41I am trying to access the LSM330DLC devie using the SPI interface without luck. I have religiously tried to follow instructions in the part data sheet to read the WHO_AMI_G register but the there is no output on the SDO pin of the part when I perform a read over the SPI port. Here is how I have setup the part: * running the SPI clock at 3 Mhz * CS_G set low and CS_A set high Is there anything obvious I am missing? Also, I am trying to figure out the location of the source code for  iNEMO LI3 engine LITE. The online page for the resource on the STM website has a PDF for no source code. Can somebody point me to where I can find the code? Thanks in advance!

Posted on June 04, 2013 at 10:14libPDMFilter_IAR.a Does LibPDMFilter_IAR.a in the STMF4 DISCORVERY  is used for all STM32 family? for example, Is LibPDMFilter_IAR.a used for STM32F1XX not STM32F4XX????

Posted on May 07, 2013 at 18:05We have two LSM303DLHC on one board. Sometimes one of them appears to be stuck at -4096 on some axes. Even when I wave a magnet close to it doesn't change. The next day it's ok. The board was sitting on my desk all day. The datasheet says in presence of disturbing field ''Use S/R pulse to restore sensitivity'' How to do that? Is it done automatically? The compass range is set to 1.3 gauss. I can't think of anything on my desk that would generate such a magnetic field. The board draws only 1mA so it shouldn't be the current generating that. The strange thing is on the next day the compass works fine. Any suggestions? #saturation #-4096 #lsm303dlhc

Posted on May 03, 2013 at 06:25I am trying to get a gyroscope raw data using I2C. DEN_G is connected to MCU's GPIO and I set the register to use level trigger mode. I think I2C slave address is correct because when I read WHO_AM_I_G register I get 212 which is the same as default data in the datasheet. I do get a correct accel data but when I read the gyro data the data doesn't change when I move the chip. The gyro data is just a random variant number. So I checked CTRL setting register from register address 0x20 to 0x2D(Using multi byte read). All the CTRL registers had a same data as I set them. But I found out that when I disable the Y,Z-axis data(only enabling X) the OUT_Y_L,H OUT_Z_L,H still has a data. I think I am not reading the incorrect OUT X,Y,Z register because I used multi byte read method from 0x20 to 0x2D.(0x28~0x2D are OUT_X,Y,Z address). So can anyone give me an advice why setting CTRL register do