Updated printable to reduce mutex operations when printing newlines

include/sta/debug/printing/printable_uart.hpp

@@ -32,8 +32,17 @@ namespace sta
          *
          * @param str       String buffer
          * @param length    String length
+         * @param newline   If true, send a \r\n to start a new line.
          */
-        void print(const char * str, size_t length) override;
+        void print(const char * str, size_t length, bool newline = false) override;
+
+        /**
+         * @brief Read string.
+         *
+         * @param str       String buffer
+         * @param length    String length
+         */
+        void read(char * str, size_t length) override;
         
     private:
         UART * intf_;