SmartMotion® MEMS Motion Sensors

Hi everyone,

I have done a 3D mouse with MPU9150 and everything was working fine, but now, I just get zeros in accel and gyro, or a random value but always the same value, it doesn't response to my moves, I have tried to power cycle, restart the sensor by writing zeros to all but 2 registers, re-initialize, and nothing works, this problem has happened in 4 of the 10 PCB's I have.

Somebody has any idea?

thanks.

I want to make sure I understand how to read the MPU6050 FIFO over I2C correctly.

My understanding is that after reading the value of FIFO_COUNT I proceed to a burst read of FIFO_R_W. The bytes I receive will be consecutive bytes from the FIFO.

I am asking because in a typical situation, if I perform a burst read the MPU will return the values of consecutive registers. Am I correct in assuming that in the case of FIFO_R_W (register addr 0x74) the MPU will return bytes from the FIFO, and not the contents of registers 0x75 (WHO_AM_I), 0x76 (doesn't exist) ... ?

Hi!

Is it possible to drive any of your microphones with a higher clock than the datasheet states to detect ultrasound?

For example, how does the INMP441 behave if I drove it with an 6.4MHz clock and so would get a 100KHz sampling frequency?

- Jonas

I get yaw drift at my MPU-6050 with DMP enabled, that lasts about 10 seconds after start.

Is it possible to prevent this drift, or is there any solution to set Yaw to zero after stabilization?

Hi,

Hi,

What are the steps to put a MPU-6050 into sleep and then wake-up when using DMP.

At the moment after coming out of sleep we do a full mpu init + dmp init + load gyrpo bias values.

We'd like to optimise this as much a possible to reduce the time taken to come out of sleep and enable DMP.

DMP active -> sleep -> (some time passes) -> wake -> DMP Active


Rob

Hey all,

So I'm connecting my MPU6050 to an Arduino micro running the DMP Example code however, every time it says that the mpu connection fails!

I ran the i2c scanner to see what address the MPU6050 was in but it says no devices found. I'm not sure what I'm doing wrong.

I have the following pins connected:

VIN to 5V (also tried 3.3V)
GROUND to GROUND
SDA to A4
SCL to A5

We've also tried INT to D2.

Hello,

I would like to know how long it takes the sensor from acquiring data until it is placed in the FIFO, in other words, which is the delay time measured using the DMP.

Regards,

Andrea

Can I verify that the code found in the Embedded MotionDriver v5.1.2 on the Downloads page will allow me to use the DMP features on the MPU-9250? I am going to be using it with a MSP430F5438A chip via I2C.

I am looking to get quaternion data out for rotational calculations because trying to do it only using the gyro register outputs is going to be hard.

Hello,

I would like to know how long it takes the sensor from acquiring data until it is placed in the FIFO, in other words, which is the delay time measured using the DMP.

Regards,

Andrea