SmartMotion® MEMS Motion Sensors

I am attempting to implementing an Unscented Kalman Filter for sensor fusion. I am having a tough time discerning the standard deviation values for noise/bias in the measurement for the 3 sensors in the MPU9250. The datasheet only has one value for all three axes for all three sensors. Is this correct? Could anyone find more detailed specs? Thank yoU!

Hi

Im looking in the MPU9250 data sheet but i can found the SPI line voltages.
I found for the I2C for the Vil,Vih, and Voh,Vol, but not for SPI.
So could i count for the Vi/oH range for about 0.7*Vdd - Vdd, or something else ? (Vdd will be 3.3V)
And for the Vi/oL 0V-0.3*Vdd ?

I need to know these values, i we have to add some safety ESD/EMI elements between the sensor and the processor, on which can be some voltage drop.

Thanks

i want use mpl libraries in my arduino ,but it shows error below

i think my arduino use [xtensa-lx106-elf-gcc]

but offical library use [arm-none-eabi-gcc-4.9.3]

who can help me

c:/users/name/appdata/local/arduino15/packages/esp8266/tools/xtensa-lx106-elf-gcc/1.20.0-26-gb404fb9-2/bin/../lib/gcc/xtensa-lx106-elf/4.8.2/../../../../xtensa-lx106-elf/bin/ld.exe: C:\Users\name\AppData\Local\Temp\build398b4761e2daba412071276124ee61b0.tmp/liblibmplmpu.a(compass_vec_cal.o): Relocations in generic ELF (EM: 40)

In the MPU-6500 Registers Map and Descriptions document, the self test registers are described with the note:

Please refer to the following document for information on Self-Test: MPU-6500 Accelerometer and
Gyroscope Self-Test Implementation; AN-MPU-6500A-02

where can i download this file?

Hi All,
I am using ARM board to communicate with MPU6500 evaluation board, I am currently using "InvenSense Datalogger v1.6", I have noticed from the time stamp of the data that it is not sampled at constant rate, for example if I am using 200Hz sampling the time stamps should be ideally every 5ms, which is not the case, what happens is it flickers around 5ms, sometimes 4ms and sometimes 6ms. My question is how to make the sampling rate fixed, I know that the chip has dataready flag that can be used but I don't know how to make the software use that flag.

Thanks

Hello,

Dear Shifu,

I'm try to read the WHO AM I register of MPU6500 in SPI way. The situation and question are:

1. I transfer the address 0xF5, and got the data from MPU6500, but the data is not 0x70, the data is not any constant, it changes all the time. I don't know whether my SPI software is not ok or the MPU6500 is broken.

I use MPU-9250 with Motion driver v5.1.3. and I have to use it with Camera in my application. It is important that camera frame and sensor readings frame from MPU is taken at same time. I am wondering is it possible to use DMP and make good synchronization with external device as camera in my case?

i only want to know if there are hardware offset registers of MPU6050 module.
I can't find them in the register map file but i incidentally found this file

MPU Hardware Offset Registers Application Note http://www.digikey.com/en/pdf/i/invensense/mpu-hardware-offset-registers

I’m running the Embedded MotionDriver 6.12 software on MSP430F6638 processor and communicating with a MPU-9250 via I2C. I’m using the DMP to perform 6-axis fusion and the MPL to add in the compass data for 9-axis fusion. I have several questions about the MPL library.

1) How can I determine the status of the compass calibration? Presumably I need to perform some figure-eight patterns but I don't know how to perform it
2) Is there any documentation on the MPL functions? There was none included in the MotionDriver 6.12 zip file and the header files don’t have any comments.