Moved files to common, protocol and doc directory

common/uart.h

@@ -0,0 +1,11 @@
+#ifndef _uart_included_h_
+#define _uart_included_h_
+
+#include <stdint.h>
+
+void uart_init(uint32_t baud);
+void uart_putchar(uint8_t c);
+uint8_t uart_getchar(void);
+uint8_t uart_available(void);
+
+#endif