SmartMotion® MEMS Motion Sensors

Hi,
I am working on a project which use MPU-9250 ,
I understand that the HAL implementation is not the standart
sensor implementation, and its hacked upwards into the SensorManager
using invensenseHAL.so object,
I still dont understand how to achive the fused data transfer into the Filesystem , i can read the RAW values that means that the imu is functioning ,
Is there any refference on the SensorManager using the api???
Or maybe a manual on how to integrate the API???
Thanks

Hi there,

Does anyone have ever used the ITG-3400 before? I guess I am the first one in this world to use it because no one has ever posted this problem.
So somehow, there is no register map information (unlike other gyros).
https://invensense.tdk.com/mems/gyro/tripleaxis.html

Invensense Support, could you please help?

How can we change the output data rate of MPL linear acceleration function.
I'm using Motionapps 6.1 with MPU 6050.

Hi,

I'm using Motion Apps 6.1 with MPU6050 to get linear acceleration data using the given python script. What is the output data rate of that? It seems like its around 20Hz. How can we change it to higher rates? Please help

Hello,

I am using the CA-SDK board, but I don't understand the magnetometer values. When I don’t move the board the output is: -2.5665 -6.2953 43.1705. When I’m rotating the board about 90° around the Z-axis the output is -2.9872 -5.8453 41.5206. Then I rotate again over an angle of 90° (180° relative to the starting position) the output is: -3.1554 -6.5953 41.2206.
How do I know the position of North, East, South and West is? What is the meaning of these values?

Thanks in advance.

Hello,

I bought the MPU-9250 CA SDK kit, and have been trying to use it to figure out movement of a car.

The values of acceleration from the accelerometer when at rest are fine. But, when we move the board in either x or y direction, we get huge spikes in Z direction (sometimes 2x of resting value). Why is this happening?

Cheers

KS

Hello All,

I am able to use basic feature of MPU6050.

I have also used data ready interrupt but I am unable to use Motion Detection Interrupt.

Here is the sequence of command I have sent but it never trigger motion interrupt.

// Enable INTERRUPT
MPU6050_write_reg(MPU6050_INT_ENABLE, bit(MPU6050_MOT_EN));

// set motion thrashhold
MPU6050_write_reg(MPU6050_MOT_THR, 0x3);

// Clear the 'sleep' bit to start the sensor.
MPU6050_write_reg(MPU6050_PWR_MGMT_1, 0x0);

Hi,
Help me, please, to find (or calculate) the precision of the magnetometer and accelerometer of the MPU 9250. I cannot find that information in docs.
Thank you.

I use arduino ported library from https://github.com/rpicopter/ArduinoMotionSensorExample

When I change full scale range of gyro to FSR_250 (INV_FSR_250DPS) through mpu_set_gyro_fsr(250);
quaternions that I receive shows much faster rotation.

For abou 10 degree board rotation quaternion shows like 360 degree rotation.
What I am doing wrong?

Hello, sorry for my newbie question but i want to start playing with motion sensors. What the value means for the device ?

for acceleration

if the raw data output is

first instance
ax= 100
ay = 0
az= 0

second instance
ax= 400
ay =0
az = 0

third instance

ax= 0
ay =0
az = 0

for gyroscope

first instance
gx= 10
gy= 0
gz= 0

second instance
gx= 40
gy= 0
gz = 0