add schematic pdfs and firmware code

Code/devterm_keyboard/keys.h

@@ -0,0 +1,27 @@
+#ifndef KEYS_H
+#define KEYS_H
+/*
+ * keys include the joystick and mouse left/mid/right keys
+ */
+
+#include "devterm.h"
+#include "keys_io_map.h"
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <string.h>
+
+
+#ifndef KEY_DEBOUNCE
+#   define KEY_DEBOUNCE 5
+#endif
+
+#define KEYS_NUM 16
+
+
+void keys_task(DEVTERM*);
+void keys_init(DEVTERM*);
+
+
+
+#endif