Joystick registers double

[user7743]

Hi all,
I am having some interesting behaviour with my sense hat. I wrote some code to be invoked on button press with the joystick. I noticed it seems to be being run twice. So, I took some code from teh getting started tutorial and modified it a touch.

If I run the code below. For every button press of the joystick I get the direction printed twice. Is this intended behaviour and I missed something? It seems far too consistent for a hardware fault IMO.

If this is intended, how do I react to the button press but only call the function once and not twice?

Here is the code...

Code: Select all

from sense_hat import SenseHat

sense = SenseHat()

# Define the functions
def up():
    print 'up'


def down():
    print 'down'


def left():
    print 'left'


def right():
    print 'right'


def middle():
    print 'middle'


# Tell the program which function to associate with which direction
sense.stick.direction_up = up
sense.stick.direction_down = down
sense.stick.direction_left = left
sense.stick.direction_right = right
sense.stick.direction_middle = middle

while True:
    pass  # This keeps the program running to receive joystick events

[scotty101]

I believe you can add a check to the callback function to tell whether the event was triggered by pressing the joystick or releasing it.

According to the tutorial (https://projects.raspberrypi.org/en/pro ... nse-hat/10)

Code: Select all

def up():
    if event.action == 'pressed':
        print("Pressed Up")

Or the official documentation says that this is the syntax but I presume both work (https://pythonhosted.org/sense-hat/api/#joystick)

Code: Select all

if event.action != ACTION_RELEASED:

[alphanumeric]

I did it this way, just a snippet of my full code.
Each button has three functions. Pressed, released, and held.
And there are 5 buttons, up, down, left, right and center.

Code: Select all

from sense_hat import SenseHat, ACTION_PRESSED, ACTION_HELD, ACTION_RELEASED

sense = SenseHat()


def pushed_up(event):
    if event.action == ACTION_PRESSED:
       sense.low_light = False
        
def pushed_down(event):
    if event.action == ACTION_PRESSED:
       sense.low_light = True

sense.stick.direction_up = pushed_up
sense.stick.direction_down = pushed_down
sense.stick.direction_left = pushed_left
sense.stick.direction_right = pushed_right
sense.stick.direction_middle = pushed_middle