No Angle Outputs in the ADIS16480

Hello Merlin,

Since this is a separate application, I hope you don't mind me creating a new discussion for this.  We have two other reported cases like this and have decided to offer replacements, while we continue to investigate the root cause. Can you send me a private message with your email, so we can start the return/replacement process. We do expect to post an update for the root cause, once we are 100% of what has happened. Regardless of the follow-up activity, we do apologize for the inconvenience and will work to address this quickly.

Best,

NevadaMark

I have to apologize because I jumped to the wrong conclusion. You appear to have Euler Angle outputs in the evaluation software. In the evaluation software, are you able to read the EKF_CNFG register value? That might be helpful.

Best,

NevadaMark

Yes I can. However i am unable to obtain X,Y and Z_DELTANG_OUT not even using the evaluation software. Can you advice me how to attach a file and I'll attach some readings for you with what I'm implying.

Thanks,

Merlin

Hello Merlin,

Yes, that is why I asked for the EKF_CNFG contents. To attach a file, click on "Advanced Editor," which is located in the upper right hand of the Editor.  Then scroll down, below the editor to see the "Browse" button on the left side, which allows you to select a file to attach to the post. Please see the pics below for graphic reference. I hope that helps.

Best,

NevadaMark

When you first click, Reply, look here for the Advanced Editor option:

Scroll down to see this view on the left side of the screen

I am attaching the Configuration EKF_CNFG settings as a picture.

Also please fins the first attachment with a set of data including x_accl_out, y_accl_out, z_accl out, x_deltang_out, y_deltang_out, z_deltang_out, x_deltvel_out, y_deltvel_out, z_deltvel_out and Eulers angles.

Please note the ADIS velocity values are not making sens as in my opinion the rest are working fine.

Also when I use SPI communication, I can read the normal data well, such as temperature, production ID, gyro readings etc,  but I am unable to obtain Euler's angles nor the velocity readings.

What I can notice is the the Euler's angles are not in relation to Magnatic North but the the start-up position each time I switch the 3D view on.

Regards,

Merlin

By the way, when connected via a usb, the temperature goes up quite fast. Within few minutes of reading data, the temperature went up to 35 degrees. It might be normal but I am letting you know to confirm it.

Regards,

Merlin

Hello Merlin,

Still looking through your data but 35C doesn't sound unreasonable for the temperature reading.

Best,

NevadaMark

Dear NevadaMark,

I know I said this but to make it clear. I can read Euler's angles well but not the velocities using the evaluation program. When I try to read the data using SPI communication I am unable to read neither Euler's angles nor velocity data, all the basic instruments (gyro, temp, acc etc) are available.

I hope you get back to me soon.

Regard,

Merlin

Hello Merlin,

A controlled experiment might help test this function. Can you duplicate the following procedure and let me know what the accumulated angle response looks like? 

https://ez.analog.com/docs/DOC-2181

Best,

NevadaMark

Dear NevadaMark,

Sorry for being late. I just followed the exact method performed by the video with the book etc. The readings doesn't make sens. I tried it the second time having  approximately the same results as you can see in the following attachments.

I used the method of combining both z_gyro_out and z_gyro_low explained in this forum:

https://ez.analog.com/docs/DOC-2162

followed by converting to 2's compliment using the if statement, the delta angle and total angle as the excel example attached to the forum you emailed me:

https://ez.analog.com/docs/DOC-2181

Hope to hear from you soon,

Merlin