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Robotc Varible motor with one button

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Robotc Varible motor with one button

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Casey890

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Joined: Mon Feb 27, 2012 5:26 pm
Posts: 19

Robotc Varible motor with one button

Hi trying to make a code for a ball launcher for a class assignment but have the issue of a high speed gear ratio stripping the tetrix dc motors. I have two motors on one port on sensor port one motor controller 3. The idea one hit of button 6 motor = 25 the 2nd hit will go to 50 the 3rd to 75 the 4th to a 100 and have button 7 do the same thing but slow it down so to make it go down -25 each hit to 0. I don't know much but I can provide a code that has the details.

Tue May 29, 2012 2:28 pm

magicode

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Joined: Tue Sep 14, 2010 9:19 pm
Posts: 495

Re: Robotc Varible motor with one button

Here's some code for what you want to do:


	Code: int numPressed = 0; bool stillPressed6 = false; bool stillPressed7 = false; while(true){ if(joy1Btn(6)){ if(!stillPressed6){ stillPressed6 = true; if(numPressed < 4){ numPressed++; } } }else stillPressed6 = false; if(joy1Btn(7)){ if(!stillPressed7){ stillPressed7 = true; if(numPressed > 0){ numPressed--; } } }else stillPressed7 = false; motor[shaft] = numPressed*25; }

This is untested code, but it should give you an idea for what you want to do.

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Thu May 31, 2012 2:38 am

Casey890

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Joined: Mon Feb 27, 2012 5:26 pm
Posts: 19

Re: Robotc Varible motor with one button

hey would it be possible to do a motor power of 25 at 1 button press of button 7 and two presses at 7 = 100 motor power. and be able to do the same thing with button 6 in reverse?
Thanks for the previous post that was very great for an untested code thank you.

Thu Aug 16, 2012 7:37 pm

MHTS

Guru

Joined: Sun Nov 15, 2009 5:46 am
Posts: 1023

Re: Robotc Varible motor with one button

Magicode's code with slight modification:


	Code: #define NUM_SPEEDS 5 int motorSpeed[NUM_SPEEDS] = {0, 25, 50, 75, 100}; int numPressed = 0; bool stillPressed6 = false; bool stillPressed7 = false; while(true){ if(joy1Btn(6)){ if(!stillPressed6){ stillPressed6 = true; if(numPressed < NUM_SPEEDS - 1){ numPressed++; } } }else stillPressed6 = false; if(joy1Btn(7)){ if(!stillPressed7){ stillPressed7 = true; if(numPressed > 0){ numPressed--; } } }else stillPressed7 = false; motor[shaft] = motorSpeed[numPressed]; }

To do just 2 speeds, change NUM_SPEEDS to 3 and just initialize the array to contain only 0, 25 and 100.

Thu Aug 16, 2012 9:02 pm

Casey890

Rookie

Joined: Mon Feb 27, 2012 5:26 pm
Posts: 19

Re: Robotc Varible motor with one button

I tried the code it is fantastic alone how ever I can't have it do tel-op with the rest of the robot is there anything I can do to help and thanks for everything.

Thu Aug 30, 2012 3:01 pm

MHTS

Guru

Joined: Sun Nov 15, 2009 5:46 am
Posts: 1023

Re: Robotc Varible motor with one button

I assume when you said tele-op, you meant using a joystick to drive the robot around? If so, you can do this with the same code:


	Code: #define NUM_SPEEDS 5 int motorSpeed[NUM_SPEEDS] = {0, 25, 50, 75, 100}; int numPressed = 0; bool stillPressed6 = false; bool stillPressed7 = false; while(true){ if(joy1Btn(6)){ if(!stillPressed6){ stillPressed6 = true; if(numPressed < NUM_SPEEDS - 1){ numPressed++; } } }else stillPressed6 = false; if(joy1Btn(7)){ if(!stillPressed7){ stillPressed7 = true; if(numPressed > 0){ numPressed--; } } }else stillPressed7 = false; motor[shaft] = motorSpeed[numPressed]; int drivePower = joystick.joy1_y1; int turnPower = joystick.joy1_x1; // // Alternatively, instead of dividing by 2, // you can do slightly complex calculation to scale // the motor values to be within +/- 100. // motor[leftMotor] = (drivePower + turnPower)/2; motor[rightMotor] = (drivePower - turnPower)/2; }

Thu Aug 30, 2012 3:38 pm

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