SmartMotion® MEMS Motion Sensors

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By ajsinopoli , 11 May 2016

Hello,
We are trying to register the g-force of a rifle recoil. That happens in about 5 milliseconds. Is the 9250 capable of picking this up and reporting it accurately. So far we only seems to be getting a very nominal number 1-2 G's from a firearm that knocks you off your feet.

Thanks,
Tony

By dev02 , 10 May 2016

Hi,

I am using MSP430F5529LP with EmsensrMPU9250 breakout board. And I am using Embedded motion driver 6.12. I am doing this connections. But I am getting some errors.

MPU9250 MSP430
SDA -> P4.1
SCL -> P4.2
VDD -> 3.3V
VDDI -> 3.3V
INT -> p1.6

Is this set up correct?

Best regards,

By bluesky0215 , 10 May 2016

I am developing the firmware for TI MSP430F5438A to control MPU-9250 via SPI.
However, I found that the result which I received is so strange.
This is the result of acceleration when I put the MPU-9250 on the table with Z-axis toward up:
Image removed.

By trojka23 , 4 May 2016

Hey guys

I want to know whether information about the accuracy of the orientation generated by the DMP is available. This is with respect to the 6 DoF proprietary sensor fusion algorithm that the DMP uses.

I don't have an Inertial Guidance Test Systems (IGTS) my self or a similar set-up in order to perform the test myself.

Maybe any or you guys performed a similar test? Please let me know.

By gregm102 , 2 May 2016

Simple Question about the sample rate for the motion Library. I am attempting to use the Motion Library 6.12 and have set the DMP enabled (Sampling at 200 Hz is the default rate i think?) Ive noticed that the CA-SDK demo package for the motion library always has the FIFO rate for data coming out of the MPU-9250 to be the same as the Motion Library Sample Rate.
SO for each call to dmp_read_fifo (gyro,access, quat, ...) there is a call to inv_build_gyro(...), inv_build_accel(...), and inv_build_quat(...).

By cat-mail , 2 May 2016

Hello

I'm using the MPU 9250 and I'm trying the Saving and Loading Calibration Data by using Motion Driver 6.12.
In App Note 1 - Motion Driver 6.12 Getting Started, there are functions about caliblation

inv_error_t inv_save_mpl_states(unsigned char *data, size_t sz)
inv_error_t inv_load_mpl_states(const unsigned char *data, size_t length)

Would you tell me how to make "unsigned char *data".