Headlights

Submitted by Thieu on Mon, 03/11/2019 - 20:59

Forums:

Hello, is it possible to use a button on the ps3 controller to switching led on and off? For example with the L1 button

Greetings Thieu

piborg's picture

piborg

Tue, 03/12/2019 - 22:03

It is fairly simple to add a new button :)

First add the button's number to the "settings" section towards the top of the script:

# Settings for the joystick
axisUpDown = 1                          # Joystick axis to read for up / down position
axisUpDownInverted = False              # Set this to True if up and down appear to be swapped
axisLeftRight = 2                       # Joystick axis to read for left / right position
axisLeftRightInverted = False           # Set this to True if left and right appear to be swapped
buttonResetEpo = 3                      # Joystick button number to perform an EPO reset (Start)
buttonSlow = 8                          # Joystick button number for driving slowly whilst held (L2)
slowFactor = 0.5                        # Speed to slow to when the drive slowly button is held, e.g. 0.5 would be half speed
buttonFastTurn = 9                      # Joystick button number for turning fast (R2)
buttonNew = 14							# New button, set to PS3 cross
interval = 0.00                         # Time between updates in seconds, smaller responds faster but uses more processor time

There is a quick reference sheet here for PS3 remotes, otherwise you can use jstest /dev/input/js0 and see which value changes when you press the button you want

Second look for the elif event.type == pygame.JOYBUTTONDOWN: line and add a test for the event button code inside that block like this:

            if event.type == pygame.QUIT:
                # User exit
                running = False
            elif event.type == pygame.JOYBUTTONDOWN:
                # A button on the joystick just got pushed down
                hadEvent = True
                if event.button == buttonNew:
                    print 'New button pressed :)'
            elif event.type == pygame.JOYAXISMOTION:
                # A joystick has been moved
                hadEvent = True

If everything has worked you should see the printed message each time you press the button you have set.

All you then need to do is swap the print statement for the code to change your LED.

Thieu

Tue, 06/30/2020 - 18:57

Hello piborg, is it possible to set the light on when button hold
And light off when button not hold?

Greetings Thieu

piborg's picture

piborg

Wed, 07/01/2020 - 16:03

What you need is the ability to detect when the button is pressed and when it is released.

The pygame.JOYBUTTONDOWN event happens when a button is pressed, so the same change from before can be used to turn the light on.

The pygame.JOYBUTTONUP event happens when a button is released. We can add another event type to detect this and use it to turn the light off.

This code should print the correct messages as the button is pressed and released. All you then need is the code to turn the light on and off :)

            if event.type == pygame.QUIT:
                # User exit
                running = False
            elif event.type == pygame.JOYBUTTONDOWN:
                # A button on the joystick just got pushed down
                hadEvent = True
                if event.button == buttonNew:
                    print 'Turn light on here'
            elif event.type == pygame.JOYBUTTONUP:
                # A button on the joystick just got released
                hadEvent = True
                if event.button == buttonNew:
                    print 'Turn light off here'
            elif event.type == pygame.JOYAXISMOTION:
                # A joystick has been moved
                hadEvent = True

Thieu

Wed, 07/01/2020 - 18:38

Many thanks piborg👍

Subscribe to Comments for "Headlights"