"Could not find ADXRS450 gyro on SPI port 0" Error - Java

[NewProgrammer]

Hello Chief Delphi,

I am attempting to implement the ADXRS450 gyroscope (http://firstchoicebyandymark.com/fc16-000) that was included in the kit of parts this year with Java, but running into the following problem:

ERROR 1 could not find ADXRS450 gyro on SPI port 0 org.usfirst.frc.team1188.robot.Robot.robotInit(Rob ot.java:10)

I have looked at this CD thread (http://www.chiefdelphi.com/forums/showthread.php?p=1531890) and this FRC Reddit post (https://www.reddit.com/r/FRC/comments/43locz/having_trouble_getting_adxrs450_gyro_working/?), as well as several other CD threads relating to this chip and the Analog Devices FRC page, but nothing has helped me.

Here is code from my Robot.java file. I was trying to just isolate the gyro, and have no logic in any of the other methods (teleop periodic, etc.)


import edu.wpi.first.wpilibj.ADXRS450_Gyro;
import edu.wpi.first.wpilibj.IterativeRobot;

public class Robot extends IterativeRobot {
ADXRS450_Gyro gyro;

public void robotInit() {
gyro = new ADXRS450_Gyro(); // This is the line specified in the error message.
}
}

I get a very similar error when trying to use the chip's ADXL362 accelerometer, though it specifies SPI port 1 instead of port 0. I'm hoping the solution to this problem solves that as well, but it's secondary because I can always use the built in accelerometer.

I have tried using the other constructor specified in the wpilib, that requests an SPI port. I have tried both ports 0 and 1; same error for each (but the SPI port in the messages changes as expected.)
I have NOT tried this chip on any other RoboRIO, or any other chip with this code. I have also not tried any other device in this RoboRIO's SPI port, so I can't rule out hardware as a problem. But, I also don't know of a good way to test that quickly.

Has anyone gotten this device to work in Java? The internet seems to have very little information on it in an FRC-context, but with every team getting one this year I'm hoping someone can help.

Please let me know if I need to provide any additional details. Thank you in advance!

[mikets]

Has anyone gotten this device to work in Java? The internet seems to have very little information on it in an FRC-context, but with every team getting one this year I'm hoping someone can help.

Please let me know if I need to provide any additional details. Thank you in advance!
Our team is using this gyro and it works great. We don't have any problems with it.
https://github.com/trc492/Frc2016FirstStronghold/blob/master/FirstStronghold/src/frc492/Robot.java

[Arhowk]

Have you hooked up a probe to the clock and message lines to the spi gyro to make sure that valid data is being exchanged? If the RIO isn't sending data you may have a firmware issue. If data is being sent than either your not lighting the right chip select line or you have an issue with the gyro

[NewProgrammer]

Hi mikets and Arhowk, thank you for your replies.

Mikets, under the hood, your code looks similar to our code. I downloaded it and ran it, and I get the same problem. This leads me to believe we have a hardware issue. But, the knowledge that other teams are using this successfully with Java is important, so thank you.

Arhowk, no, we haven't done that. I think that's what our next step needs to be, but unfortunately due to resource constraints (in particular time), I'm not sure that we will in the imminent future. I was hoping this would just be a silly code issue.

I think for now, we will be reverting to the old kit of parts gyro. If we have time to either test our SPI or test a different ADXRS450 sometime before the end of season, we'll try that. If not, perhaps after our season ends.

Thanks again for the help!

[josephno1]

We use the same gyro and it works fine. Here is the line that I used to call the gyro.

public static ADXRS450_Gyro gyro= new ADXRS450_Gyro();

Do you guys use any roboRIO expansions since I don't think it is an error how you guy's code