Source code for dot3k.joystick

import time
from sys import exit

    import RPi.GPIO as GPIO
except ImportError:
    exit("This library requires the RPi.GPIO module\nInstall with: sudo pip install RPi.GPIO")


LEFT = 17
RIGHT = 22

    UP = 21
    UP = 27

DOWN = 9

BOUNCE = 300

repeat_status = {
    UP: False,
    DOWN: False,
    LEFT: False,
    RIGHT: False,
    BUTTON: False

[docs]def on(buttons, bounce=BOUNCE): """Handle a joystick direction or button push Decorator. Use with @joystick.on(joystick.UP) :param buttons: List, or single instance of joystick button constant :param bounce: Debounce delay in milliseconds: default 300 """ buttons = buttons if isinstance(buttons, list) else [buttons] def register(handler): for button in buttons: GPIO.remove_event_detect(button) GPIO.add_event_detect(button, GPIO.FALLING, callback=handler, bouncetime=bounce) return register
[docs]def millis(): """Return the current time in milliseconds.""" return int(round(time.time() * 1000))
[docs]def repeat(button, handler, delay=0.1, ramp=1.0): """Detect a held direction and repeat If you want to hold a direction and have it auto-repeat, call this within a joystick direction handler. :param button: Joystick button constant to watch :param handler: Function to call every repeat :param delay: Delay, in seconds, before repeat starts and between each repeat :param ramp: Multiplier applied to delay after each repeat, 1.0=linear speed up """ if repeat_status[button]: return False repeat_status[button] = True last_trigger = millis() while GPIO.input(button) == 0: m = millis() if m - last_trigger >= (delay * 1000): handler() delay *= ramp last_trigger = m repeat_status[button] = False
up = GPIO.setup(UP, GPIO.IN, pull_up_down=GPIO.PUD_UP) down = GPIO.setup(DOWN, GPIO.IN, pull_up_down=GPIO.PUD_UP) left = GPIO.setup(LEFT, GPIO.IN, pull_up_down=GPIO.PUD_UP) right = GPIO.setup(RIGHT, GPIO.IN, pull_up_down=GPIO.PUD_UP) button = GPIO.setup(BUTTON, GPIO.IN, pull_up_down=GPIO.PUD_UP)