fix merge conflict in branch

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

diff --git a/src/adafruit_blinka/microcontroller/generic_linux/periphery_pin.py b/src/adafruit_blinka/microcontroller/generic_linux/periphery_pin.py
new file mode 100644 (file)
index 0000000..daa3240
--- /dev/null
+++ b/src/adafruit_blinka/microcontroller/generic_linux/periphery_pin.py
@@ -0,0 +1,72 @@
+try:
+    from periphery import GPIO
+except ImportError:
+    raise ImportError("Periphery Python bindings not found, please install and try again! Try running 'pip3 install python-periphery'")
+
+# Pins dont exist in CPython so...lets make our own!
+class Pin:
+    IN = "in"
+    OUT = "out"
+    LOW = 0
+    HIGH = 1
+    PULL_NONE = 0
+    PULL_UP = 1
+    PULL_DOWN = 2
+    _CONSUMER = 'adafruit_blinka'
+
+    id = None
+    _value = LOW
+    _mode = IN
+
+    def __init__(self, pin_id):
+        self.id = pin_id
+        if type(pin_id) is tuple:
+            self._num = int(pin_id[1])
+            self._chippath = "/dev/gpiochip{}".format(pin_id[0])
+        else:
+            self._num = int(pin_id)
+            self._chippath = "/dev/gpiochip0"
+        self._line = None
+
+    def __repr__(self):
+        return str(self.id)
+
+    def __eq__(self, other):
+        return self.id == other
+
+    def init(self, mode=IN, pull=None):
+        if mode != None:
+            if mode == self.IN:
+                self._mode = self.IN
+                if self._line is not None:
+                    self._line.close()
+                self._line = GPIO(self._chippath, int(self._num), self.IN)
+            elif mode == self.OUT:
+                self._mode = self.OUT
+                if self._line is not None:
+                    self._line.close()
+                self._line = GPIO(self._chippath, int(self._num), self.OUT)
+            else:
+                raise RuntimeError("Invalid mode for pin: %s" % self.id)
+
+            if pull != None:
+                if pull == self.PULL_UP:
+                    raise NotImplementedError("Internal pullups not supported in periphery, use physical resistor instead!")
+                elif pull == self.PULL_DOWN:
+                    raise NotImplementedError("Internal pulldowns not supported in periphery, use physical resistor instead!")
+                else:
+                    raise RuntimeError("Invalid pull for pin: %s" % self.id)
+
+    def value(self, val=None):
+        if val != None:
+            if val == self.LOW:
+                self._value = val
+                self._line.write(False)
+            elif val == self.HIGH:
+                self._value = val
+                self._line.write(True)
+            else:
+                raise RuntimeError("Invalid value for pin")
+        else:
+            return self.HIGH if self._line.read() else self.LOW
+