This posting summarizes known issues, not already in the errata) for Sensor Fusion Build 420: FRDM-KL25Z, KL26Z, KL46Z, K20D50M and K64F boards shipped to date do not include pull-up resistors on the NMI pin.  This has reportedly caused applications to not start properly because of inadvertent non-maskable interrupts.   There are several possible ways to resolve this: Add the missing pull-up resistor Disable the NMI during the first call to the NMI interrupt handler.  You can do that by replacing the existing default handler with:          // called on NMI          void Cpu_OnNMIINT(void)          {            // Disable NMI pin (some boards do not have pullups)            SIM_SCGC5 |= (uint32_t)SIM_SCGC5_PORTA_MASK; /* NMI and PORTA clock gate enable */            PORTA_PCR4 &= PORT_PCR_MUX_MASK;            /* enable input with pull up enable not NMI */            PORTA_PCR4 |= PORT_PCR_MUX(01) | PORT_PCR_PE_MASK | PORT_PCR_PS_MASK;            // return with no action            return;          } Add two new PE components.  One of type BitIO_LDD and the other of type Init_GPIO.  Between them you can assign PTA4 as an input GPIO with pullup enabled.  This has the advantage of requiring no changes to the .c or .h files. KDS builds using optimization level O3 do not properly execute the command interpreter within Events.c function UART_OnBlockReceived().  Change the project settings optimization level to O1 and it should work fine. It is possible for the Sensor Fusion Toolbox (both Windows and Android versions) to "fall out of sync" with the development board firmware with regard to desired sensor fusion algorithm being executed.  Symptoms and root causes are reviewed in the PDF attached to this posting.

All, We've had some problems with migration of Freescale blogs over to the NXP domain.  One set of listings that gets requested a fair bit are the postings on orientation representations.  The attached is a PDF version of the same material which will be contained in the upcoming Sensor Fusion Version 7.00 User Guide.

You will have to add a .exe extension to the unzipped file.

All, Twitter traffic revealed a need for PDF versions of the sensor fusion documentation.  Apologies for any inconvenience.  Our standard documents are in Word format (we make extensive use of the equation tools in Word), and we supply them in that same format to make it easy to reuse the material.  But for those who do not have Word, please see the attached PDF. Regards, Mike

The attached is a copy of a presentation given 24 June 2014 at the Sensors Expo Conference in Rosemont IL.

Here is the Installer file for the revision 4.2.0.8 of the Sensor Toolbox GUI

This document provides answers for some of the common questions received by the Technical Support team about some inquiries with the usage of the CRTOUCH GUI.

List of software examples published by NXP technical support: Sensors software examples published by NXP technical support * List of breakout boards designed by NXP technical support: Freescale Sensors Breakout Boards Designs – HOME * All of the source code placed in spaces above is for example use only. NXP does not accept liability for use of this code in the user’s application.

Unibody Package with Axial Single Port Case 867F-03

This is the errata corresponding to ISF 2.1 for Kenetis with updates associated with Rev 2 of the PEUPD file released on 23 April 2015.

Android sensor fusion APK

Video clip associated with "Android as a Platform for Sensor Fusion Education and Evaluation" presented at 2013 Sensors Expo & Conference by Michael Stanley.

MEMS sensors are mechanical structure chips and easily damaged by shock or huge vibration. Sensor package trend is going to small size, and it is not easy to solder by hand on pcb to verify. In order to do sensor verification before FA process, it is necessary to use a tool to load the failed chips and use I2C/SPI to access sensor registers to check sensor function. This document introduces to use sensor fixture and toolbox for a simple sensor verify tool. It is easy to provide precise failed spec items by this tool and to speed-up FA process.

As we develop videos on Sensor subjects for posting to QUMU and YouTube, these guidelines are a quick reminder of some important production points to remember. These lessons are relevent for any video content we develop.