Wrong measures with gyroscope

By manu , 20 August 2014
Forums
SmartMotion® MEMS Motion Sensors

Hi,
I use MPU9250 and I am developpping on a cortex m0.
I have some issue reading gyroscope registers.

The full scale is 250 dps.
The board is not moving but I get high values from the gyroscope :
x : 129 y : 147 z : 198
I get '0' for offset registers.

For acceleration, I get x : -0.52 y : 0.43 z : 0.77. The acceleration doesn't seems odd.

The accuracy is zero for both captors.

Is it a issue about calibration?

Thanks in advance.

robert_valvonis

11 years 7 months ago

Hi,
Try to run self test and push the biases in DMP. Please refer to motion driver for running self test and setting up MPU.

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manu

11 years 6 months ago

It was a configuration issue in initialization. I have now accel(0,0,1) and gyro (0.4,0.5,0).
I read the same values in fifo.
But when I enable the dmp, the fifo is empty. I suppose it is a another configuration issue.
I use spi to write in mpu memory. What would be the right procedure to write in MEM_R_W?

Thanks in advance

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