Restructure and move pins to generic linux

[Adafruit_Blinka-hackapet.git] / src / adafruit_blinka / microcontroller / generic_linux / rpi_gpio_pin.py

diff --git a/src/adafruit_blinka/microcontroller/generic_linux/rpi_gpio_pin.py b/src/adafruit_blinka/microcontroller/generic_linux/rpi_gpio_pin.py
new file mode 100644 (file)
index 0000000..cf3acbd
--- /dev/null
+++ b/src/adafruit_blinka/microcontroller/generic_linux/rpi_gpio_pin.py
@@ -0,0 +1,69 @@
+# SPDX-FileCopyrightText: 2025 Melissa LeBlanc-Williams for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+"""A Pin class for use with Rpi.GPIO."""
+
+from RPi import GPIO
+
+GPIO.setmode(GPIO.BCM)  # Use BCM pins D4 = GPIO #4
+GPIO.setwarnings(False)  # shh!
+
+
+class Pin:
+    """Pins dont exist in CPython so...lets make our own!"""
+
+    IN = 0
+    OUT = 1
+    LOW = 0
+    HIGH = 1
+    PULL_NONE = 0
+    PULL_UP = 1
+    PULL_DOWN = 2
+
+    id = None
+    _value = LOW
+    _mode = IN
+
+    def __init__(self, bcm_number):
+        self.id = bcm_number
+
+    def __repr__(self):
+        return str(self.id)
+
+    def __eq__(self, other):
+        return self.id == other
+
+    def init(self, mode=IN, pull=None):
+        """Initialize the Pin"""
+        if mode is not None:
+            if mode == self.IN:
+                self._mode = self.IN
+                GPIO.setup(self.id, GPIO.IN)
+            elif mode == self.OUT:
+                self._mode = self.OUT
+                GPIO.setup(self.id, GPIO.OUT)
+            else:
+                raise RuntimeError("Invalid mode for pin: %s" % self.id)
+        if pull is not None:
+            if self._mode != self.IN:
+                raise RuntimeError("Cannot set pull resistor on output")
+            if pull == self.PULL_UP:
+                GPIO.setup(self.id, GPIO.IN, pull_up_down=GPIO.PUD_UP)
+            elif pull == self.PULL_DOWN:
+                GPIO.setup(self.id, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
+            else:
+                raise RuntimeError("Invalid pull for pin: %s" % self.id)
+
+    def value(self, val=None):
+        """Set or return the Pin Value"""
+        if val is not None:
+            if val == self.LOW:
+                self._value = val
+                GPIO.output(self.id, val)
+            elif val == self.HIGH:
+                self._value = val
+                GPIO.output(self.id, val)
+            else:
+                raise RuntimeError("Invalid value for pin")
+            return None
+        return GPIO.input(self.id)