Attempt to read piezo analog inputs

piezos.hh

@@ -0,0 +1,33 @@
+#pragma once
+
+// Standard setup for a Pro Micro
+
+/*
+ * Don't forget to do this (guitar pid=0x0004, drum pid=0x0005):
+ 
+< micro.build.vid=0x2341
+< micro.build.pid=0x8037
+--
+> micro.build.vid=0x1bad
+> micro.build.pid=0x0004
+
+< micro.build.extra_flags={build.usb_flags}
+---
+> micro.build.extra_flags={build.usb_flags} -DCDC_DISABLED
+
+ */
+
+const int BUTTON_GREEN = 18;  // A0
+const int BUTTON_RED = 19;    // A1
+const int BUTTON_YELLOW = 20; // A2
+const int BUTTON_BLUE = 21;   // A3
+const int BUTTON_ORANGE = 15;
+
+const int SOLO_GREEN = 9;
+const int SOLO_RED = 8;
+const int SOLO_YELLOW = 6;
+const int SOLO_BLUE = 4;
+const int SOLO_ORANGE = 14;
+
+const int BUTTON_PLUS = 1;
+const int BUTTON_MINUS = 0;