Prepare things for the event loop, also abstract gross stuff from end users

kmk/firmware.py

@@ -0,0 +1,18 @@
+from kmk.common.keymap import Keymap
+
+try:
+    from kmk.circuitpython.matrix import MatrixScanner
+except ImportError:
+    from kmk.micropython.matrix import MatrixScanner
+
+
+class Firmware:
+    def __init__(self, keymap, row_pins, col_pins, diode_orientation):
+        self.raw_keymap = keymap
+        self.keymap = Keymap(keymap)
+        self.matrix = MatrixScanner(col_pins, row_pins, diode_orientation)
+
+    def go(self):
+        while True:
+            for event in self.keymap.parse(self.matrix.raw_scan()):
+                print(event)