add schematic pdfs and firmware code

Code/devterm_keyboard/helper.h

@@ -0,0 +1,19 @@
+/*
+ * 
+
+
+
+ */
+#ifndef HELPER_H
+#define HELPER_H
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <string.h>
+
+
+uint8_t read_io(uint8_t io);
+
+
+
+#endif