Chief Delphi - Vex Transmitter problem

Chief Delphi (http://www.chiefdelphi.com/forums/index.php)

- FIRST Tech Challenge (http://www.chiefdelphi.com/forums/forumdisplay.php?f=146)

- - Vex Transmitter problem (http://www.chiefdelphi.com/forums/showthread.php?t=48336)

TheOtherGuy

21-07-2006 00:22

Vex Transmitter problem

I have got one heck of a strange problem with my Vex transmitter. I programmed a holonomic drive vex robot to use one joystick (channels 1 and 2) to drive it, and for some reason, it switches channel 2 with channel 3 and vice versa. In other words, you have to use the left joystick for moving forward when you should be using channel 2.
I have another transmitter at my house that came with another kit, and when I switched the crystals and used the other transmitter, channel 2 worked just as it should. I went through the first transmitter and set all the configurations to match those on the second, but it still doesn't seem to work. Any help?

billbo911

21-07-2006 01:52

Re: Vex Transmitter problem

Quote:

Originally Posted by TheOtherGuy

Without seeing your code I'll have to take a SWAG. It sounds like the transmitter is in 23 mode. Try switching it to 12 mode.

Matt Krass

21-07-2006 02:33

Re: Vex Transmitter problem

Quote:

Originally Posted by billbo911

Without seeing your code I'll have to take a SWAG. It sounds like the transmitter is in 23 mode. Try switching it to 12 mode.

Did you plot that on a PDOOMA graph?

TheOtherGuy

21-07-2006 17:01

Re: Vex Transmitter problem

Quote:

Originally Posted by billbo911

Without seeing your code I'll have to take a SWAG. It sounds like the transmitter is in 23 mode. Try switching it to 12 mode.

I tested that just now and instead of replacing 2 for 3, it caused channel 1 to move all 4 motors.
Here is the code:

Code:

#include "UserAPI.h"



int motor1;

int motor2;

int motor3;

int motor4;

int ch1;

int ch2;



void main ( void )

{

    while ( 1 )

    {    

        ch1 = GetRxInput ( 1 , 1 ); //get input from channel 1

        ch2 = GetRxInput ( 1 , 2 ); //get input from channel 2

        motor1 = 255-ch2; //set motor1 opposite from motor2

        motor2 = ch2;

        motor3 = 255-ch1; //set motor3 opposite from motor4

        motor4 = ch1;

        SetPWM ( 1 , motor1 ); 

        SetPWM ( 2 , motor2 );

        SetPWM ( 3 , motor3 );

        SetPWM ( 4 , motor4 );

    }

}

It works just fine with the second transmitter and the configurations are the same on both transmitters.

All times are GMT -5. The time now is 06:41.