MEMS (sensors)

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PCB Design guideline for LSM303DLHC sesnor chip

Posted on May 24, 2016 at 03:18Hi all, I recently designed a new PCB board for the LSM303DLHC Tilt-compensated compass ( please see attachment). I soldered everything onto the board and connected it to the microcontroller to test it, the raw data o...

Problem with changing control registers of hts221

Posted on May 03, 2016 at 18:14Hi, I'm using a stm32f469 disco board and a x-nucleo-iks01a1 extension board and I'm trying to set some of the control bits. I'm able to read all registers over i2c without any problems. But if i try to write any of th...

jh by Associate II
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LIS2DH SPI not Working

Posted on April 02, 2016 at 11:15I am using LIS2DH spi to communicate with nrf51822. I have set CPOL =1(active Low) and CPHA=1(trailing). I am able to see CS , MOSI and CLOCK properly but MISO pin is always high.Below is my code.                    ...

No Response to WHO_AM_I read request on IIS328DQ

Posted on May 16, 2016 at 23:36Greetings, I'm trying to use a Cypress CY8C4247 microcontroller to communicate with an ST Accelerometer (IIS328DQ) and getting nowhere. I have the SPI configured for 1MHz communication, standard Motorola SPI with data ...

HTS221 and SPI using HTS221_Driver.c

Posted on May 14, 2016 at 21:08 Hello, i tried to connect my STM32F103 to a HTS221 sensor, but I do not get correct values for temperature and humidity. HTS221_Driver.c has version 1.0.0 from 07/04/2014 What I did so far: ...

LPS22HB Help

Posted on March 25, 2016 at 14:51I am working with the LPS22HB pressure sensor and I cannot get a response from it. I have ctrl_reg1 set as 01000000, ctrl reg 2 set as 00011000, and everything else as default. I am using a 1MHz SPI clock and a CS pi...

kmcgrath by Associate
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LPS25HB Spec Discrepencies

Posted on April 21, 2016 at 16:57DoclD027112 Rev2. Description for CTRL_REG1 in Register description 8.6 DIFF_EN - Interrupt generation enable. Default value: 0 (0: interrupt generation disabled; 1: interrupt generation enabled)  Text description is...

LPS25HB Datasheet Wording

Posted on May 06, 2016 at 16:34First paragraph in section 4.2 says:The complete measurement chain is composed of a low-noise amplifier which converts the resistance unbalance of the MEMS sensors (pressure and temperature) into an analog voltage usin...

LPS22HB Device Independent Drivers

Posted on April 22, 2016 at 20:13I am unable to locate the platform independent device driver for LPS22HB.  Has anyone been able to locate it?I expected a link/download to be located here:https://my2.st.com/content/my_st_com/en/products/embedded-sof...

the1engr by Associate II
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Question for INEMO_PI3P

Posted on April 19, 2016 at 18:40Hi,I bought STEVAL-MKl109V2 and STEVAL-MKL159V1. But I can't find the iNEMO PI3P.Could you give me a link to download the INEMO_PI3P library.Thanks,Alex #inemo

yifeng by Associate
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