HATs and other add-ons • Re: raspberry pi 4 model B with RB-MATRIXCTRL and a button

Code:

import RPi.GPIO as GPIOimport timefrom samplebase import SampleBasefrom rgbmatrix import graphicsimport threadingBUTTON_GPIO = 0  # pin 27BOUNCE_DELAY = 0.2  # secondsclass ButtonClickCounter(SampleBase):    def __init__(self, *args, **kwargs):        super(ButtonClickCounter, self).__init__(*args, **kwargs)        # Setup GPIO        GPIO.setmode(GPIO.BCM)        GPIO.setwarnings(False)        GPIO.setup(BUTTON_GPIO, GPIO.IN, pull_up_down=GPIO.PUD_UP)        self.count = 0        self.lock = threading.Lock()        self.font = graphics.Font()        self.font.LoadFont("../../../fonts/6x10.bdf")  # use a small readable font        self.color = graphics.Color(255, 255, 255)    def button_watcher(self):        was_pressed = False        while True:            if GPIO.input(BUTTON_GPIO) == GPIO.LOW and not was_pressed:                was_pressed = True                with self.lock:                    self.count += 1                    print(f"Count is now {self.count}")                time.sleep(BOUNCE_DELAY)            elif GPIO.input(BUTTON_GPIO) == GPIO.HIGH:                was_pressed = False            time.sleep(0.01)    def run(self):        canvas = self.matrix.CreateFrameCanvas()        # Start the button thread        threading.Thread(target=self.button_watcher, daemon=True).start()        while True:            canvas.Clear()            with self.lock:                text = f"Clicks: {self.count}"            graphics.DrawText(canvas, self.font, 1, 10, self.color, text)            canvas = self.matrix.SwapOnVSync(canvas)            time.sleep(0.1)    def __del__(self):        GPIO.cleanup()if __name__ == "__main__":    app = ButtonClickCounter()    if not app.process():        app.print_help()