Chief Delphi - Glitching PWM's Need Help

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K-Dawg

01-02-2008 00:28

Glitching PWM's Need Help

We are trying to program using EasyC Pro. The problem, although I don't think it has anything to do with the program is the PWM value is glitching/jumping. Even in the nutral position the value changes as much as 10 points. This can be seen while viewing the dashboard. This is without any one touching the joystick. We have tried two joy sticks and a USB Xbox controller, different ports and the only thing that helps is unplugging the joy stick from the port.

Thanks

popo308

01-02-2008 00:32

Re: Glitching PWM's Need Help

Quote:

Originally Posted by K-Dawg (Post 689995)

The kit joysticks have very weak springs for returning to center... if you open it up and put stronger ones in it should help with that... as far as the Xbox controller im not sure i have never played with one

K-Dawg

01-02-2008 00:34

Re: Glitching PWM's Need Help

This is happening at any range, not just center.

Alan Anderson

01-02-2008 00:35

Re: Glitching PWM's Need Help

How are you providing power to the OI? If through the tether cable, is your main battery voltage low? Lots of glitchy stuff goes away when you use a well-charged battery.

K-Dawg

01-02-2008 00:37

Re: Glitching PWM's Need Help

Yes through Tether but the battery readings where 12.? and 7.5V

Thanks everyone

Qbranch

01-02-2008 08:04

Re: Glitching PWM's Need Help

This shouldn't change anything, but try going to IFI's website and downloading the default code and master firmware. That way you should be able to rule out any software problems. But, like I said, it shouldn't change anything. As far as i know, the dashboard port is connected in hardware to the Tx/Rx pins that send data to/from the robot (changing the jumper changes which one you are connected to).Your OI should be the only thing in the loop for those values.

However... were you looking at the Dashboard screen with data from the OI or data from the RC? Make sure you're looking at the page that list "Port 1:" and so on in a grid.

-q

Mark McLeod

01-02-2008 10:57

Re: Glitching PWM's Need Help

Which PWM ports are you using?
13-16 do have twitchy problems.

Alan Anderson

01-02-2008 12:47

Re: Glitching PWM's Need Help

Quote:

Originally Posted by Mark McLeod (Post 690157)

Which PWM ports are you using?
13-16 do have twitchy problems.

K-Dawg says they're using easyC Pro. That doesn't support pwms 13-16 at all.

K-Dawg

01-02-2008 14:12

Re: Glitching PWM's Need Help

Thanks for all the Assistance.
I spoke with IFI and they said there is a problem in the operator interface, so I shipped it to them today and hope it gets back soon.

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