Merge pull request #21 from relic-se/optional-buttons

Optional hardware peripherals initialization

Author: FoamyGuy

adafruit_fruitjam/peripherals.py

@@ -155,14 +155,16 @@ def __init__(  # noqa: PLR0913, PLR0912
         bit_depth: int = 16,
         i2c: busio.I2C = None,
     ):
-        self.neopixels = NeoPixel(board.NEOPIXEL, 5)
+        self.neopixels = NeoPixel(board.NEOPIXEL, 5) if "NEOPIXEL" in dir(board) else None
 
-        self._buttons = []
-        for pin in (board.BUTTON1, board.BUTTON2, board.BUTTON3):
-            switch = DigitalInOut(pin)
-            switch.direction = Direction.INPUT
-            switch.pull = Pull.UP
-            self._buttons.append(switch)
+        self._buttons = None
+        if "BUTTON1" in dir(board) and "BUTTON2" in dir(board) and "BUTTON3" in dir(board):
+            self._buttons = [
+                DigitalInOut(pin) for pin in (board.BUTTON1, board.BUTTON2, board.BUTTON3)
+            ]
+            for switch in self._buttons:
+                switch.direction = Direction.INPUT
+                switch.pull = Pull.UP
 
         if i2c is None:
             i2c = board.I2C()
@@ -229,28 +231,28 @@ def button1(self) -> bool:
         """
         Return whether Button 1 is pressed
         """
-        return not self._buttons[0].value
+        return self._buttons is not None and not self._buttons[0].value
 
     @property
     def button2(self) -> bool:
         """
         Return whether Button 2 is pressed
         """
-        return not self._buttons[1].value
+        return self._buttons is not None and not self._buttons[1].value
 
     @property
     def button3(self) -> bool:
         """
         Return whether Button 3 is pressed
         """
-        return not self._buttons[2].value
+        return self._buttons is not None and not self._buttons[2].value
 
     @property
     def any_button_pressed(self) -> bool:
         """
         Return whether any button is pressed
         """
-        return True in [not button.value for (i, button) in enumerate(self._buttons)]
+        return self._buttons is not None and True in [not button.value for button in self._buttons]
 
     @property
     def dac(self) -> adafruit_tlv320.TLV320DAC3100: