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Unread 06-23-2002, 11:21 PM
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#0047 (ChiefDelphi)
 
Join Date: May 2001
Location: Pontiac, MI
Posts: 21,070
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use the wheel as a throttle

Posted by Joe Johnson at 2/6/2001 1:37 PM EST


Engineer on team #47, Chief Delphi, from Pontiac Central High School and Delphi Automotive Systems.


In Reply to: Re: software software software
Posted by Matt Leese on 2/6/2001 9:27 AM EST:



We often use the wheel on the joystick as a variable throttle for the driver joystick(s).

This allows us to have a "training" speed and a competition speed.

The code is not difficult, something along the lines of:
if y1>127 then aaa
pwm1 = 127 - ((127-y1) / NCD (wheel1 + 1) Max 127)
goto bbb
aaa:
pwm1 = 127 + ((y1-127) / NCD (wheel1 + 1)) Max 254
bbb:

As a side benefit, we can dial down the throttle when we go for a show where a bunch of 3rd graders are going to be driving our robot.

Joe J.

P.S. I just wrote that code from memory on the spot, it may not be exactly correct though I believe the concept is substantially correct. JJ


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