SmartMotion® MEMS Motion Sensors

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By zmetzing , 28 February 2017

Hello all,

Our application is configured for low-power accelerometer acquistion at 500Hz, with the FIFO enabled and only the ACCEL bit is set in FIFO_EN (0x23).

Reading the data back gives sensible values most of the time:

:INFO:000 0x00000615 0x000005d2 0x00000a60
:INFO:001 0x00000615 0x000005cf 0x00000a5c
:INFO:002 0x00000615 0x000005d2 0x00000a5d

However, every so often, a decidedly incorrect value triple is reported. Keep in mind that the sensor is sitting perfectly still.

By hankpym10091122 , 27 February 2017

Hell!
I am using the mpu6500 on my drone and register mannual announce that the digital low pass filter can be configured to 5Hz cutof. My question is what the princinple or details of the digital low pass filer? can i design such kind of filter by software and lower the cutof-frequency?
Thanks!

By jramsay42 , 23 February 2017

Hi,

Both the product specification and register map have references to advanced hardware features that can be enabled through hardware register settings. I have been unable to find what registers these are. The specification refers to the register map document for more details but it has no further information. It also doesn't seem to have much information relating to the use of the DMP unit. Has anyone had any success using these features or finding documentation for them?

Thanks,
Justin

By alexkendon , 21 February 2017

Hi,

As I don't have IAR I'm trying to get the Motion Driver 6.12 example application up and running in True Studio Lite. I've imported all the files from the core directory in the STM32F4 example but it throws over 1000 errors & warnings when I'm trying to compile. I'm guessing all the symbols for configuring the library were defined in the EWARM project settings so if anybody could give me a list of the symbols or offer any other suggestions for how I might get the example working on some platform other than EWARM I'd be most appreciative.

By freelancer1 , 18 February 2017

hello

i am testing an MPU2950 wth an stm32f207, the accelerometer and gyroscope data and read perfectly.

the problem is with the magnetometer, sometimes i get data sometimes not.

i am using spi interface ( bypass disabled for i2c).

regards.

By bobokang2003 , 17 February 2017

Hi,
I'm working on the development of a wrist which embed a MPU9250 within it(it's for baby).
I'm new to MPU9250 and also new to the motion processing field.
I'd like to know is that possible for MPU9250 to know whether the baby with the wrist is up-side-down?How?
Thank you in advance.

By zk017 , 15 February 2017

I want to measure the movement distance(no more than 30 cm in single axis), now I use mpu6050. the toy move to left, then move to right, arrived the right terminal go left , arrived the left terminal go right, loops. I want to get the exact time when the toy arrive the left or right terminal and change direction.I got the pitch ,roll ,yaw and quaternions. I don't what can i do for the next step.
I wonder which variable can be used to serve as the event occurs? thank you very much!