SmartMotion® MEMS Motion Sensors

We are using the ICM-20689, for vibration measurements purposes.
We are using the low pass filter in 420Hz and then the data rate is 1kHz. We take this data and made a FFT to inform the frequency and amplitud of the vibration.
Now we detect the we have an aliased frequencies. We detect the frequencies above 500 Hz appears aliased, eg. the 510Hz appear as 490Hz with an attenuation, but if we increment the vibration frequency the measured amplitude increments. We are thinking there is an digital filter response.

Hi

I am changing from ICM20648 to ICM42670P, and hence i have bought DK-42670-P and I am struggling to directly connect the spi interface to my board? I solely want to use U1 (ICM42670P) on the development kit, is that possible? and if so how should i wire it up?

Currently i have connected my spi interface to J4 corresponding MISO, MOSI, CS and SCLK lines (pin 1,2,3,4) and a GND connected to pin 7 on J4. But I am unsure how/where I should connect my VDD (3.3V)

Thanks

Hello, everyone! I've been programming with an ICM-42688-P for its data of acceleration and angular velocity, and now something wrong happens. The output of gyroscope vibrated between -255 to +255 (scale of 2000, 8000 HZ sampling) while it stayed stationary. Sometimes the output data comes back to near 0, but it will jump to ±255 in just a few epochs. Meanwhile, the 3-axis gravity output of accelerometer in rest condition reached 9.87 m/s2, appearing a giant constant zero bias.
How can I deal with these problems? Hope for help!

Hi@all,

we are currently implementing the ICM20948 in our application. We are using the DMP and so far everything is working fine. However, we are not able to restore the acceleration, gyro and compass bias values. We are able to read the values and write them to the registers mentioned in the application note, however the icm20948 does not seem to care about the written values and always insists of performing a full auto calibration cycle. Therefore we have to turn the device around all axis a few times until all accuracy values go to the value of 3.

I just bought a DK-42670-P, installed SmartMotion 4.2.15. and when I start MotionLink and
1) Click "Select and config"
2) Choose ICM42670-P (Leave rest for default)
3) Click Flash MCU --> I get "Please check troubleshooting page for Flash Atmel

I use windows 10, and have both USB connected and J2 shorting 1-2

Any suggestions?

Hi team,
I have collected a spatial audio head tracking log in smartbug2.0,also I have applied set reference horizontal and mirror during this log. I have seen position, Raw angles, offset values in smartbug2.0 UI. My observation is that offset value not reflected in log. Also that data seems like normal fusion. Could you please clarify difference between sensor fusion log and the spatial audio head tracking log?.

hello All,

I am trying to set MPU 9250 into low power accel only mode. But It seems that After and before setting into Accelerometer only mode data is different. and I guess below statement is culprit:
IP_nrf_drv_twi_i2c_write_8bit(address,MPU9250_REG_PWR_MGMT1,0x29);

Hex values of AccelX, AccelY and AccelZ
Before Accel mode only: (Active Mode)
0 1B 0 26 7 E4

After setting in Accel mode only :
FD BB 2 8F 7 1A

===============================

Before Accel mode only: (Active Mode)
7 F6 0 1 FD 3

I tried to reduce the power consumption of 6500 in my product, and configured the register according to the manual, but the current is still 1.5ma, the following is my configuration: What is the problem?

Hi,

I have a DK-42688-P Development Kit for the ICM-42688-P MotionTracking Device, which can be found at the following link: https://invensense.tdk.com/products/dk-42688-p/

I want to conduct various tests with this development board. However, I encountered an error when attempting to use the SmartMotion app mentioned in the link above.

When I try to connect to the DK-42688-P with SmartMotion Platform 1.9.6 software and MotionLink 4.2.11 for collecting data, I receive an error from the MotionLink 4.2.11 window.

Hey everyone, I've been using ICM-42688 in different projects for some time but recently I faced an issue where I'm getting the max values continuously.
I can't find the cause of this. We do put some pressure on the sensor at times but it happens even when there's no pressure on the sensor. What could be the issue? Is it related to power supply to sensor?