Producing Morse Code Pete Sanderson Chuck Burchard Patrick Bobbie Alma College Lego Mindstorms Workshop 16 June 2005

Overview Characters typed at PC keyboard are sounded in Morse code by the RCX. Java or NQC programming language Can be tailored to 3 levels: –CS 2 –Operating Systems –Net-Centric Computing Configuration: PC and RCX, no sensors or motors at minimum

Problem Statements CS 2 Level Operating Systems Level Net-Centric Level

CS 2 Level Problem Statement PC prompts user for one line message PC stores message in string PC transmits string to RCX RCX displays each character one at a time while simultaneously sounding the equivalent Morse code. Optionally: RCX signals completion to PC for next message.

OS Level Problem Statement Extends CS 2 Level Focus on Producer(PC)-Consumer (RCX) Bounded buffer on RCX. Experiment with buffering strategies, e.g. transmitting each character as typed versus full buffer Develop basic synchronization mechanism

Net-Centric Problem Statement Builds on OS Level PC-RCX synchronization protocols to allow real- time communication Explore using the Morse as a mechanism to control other RCX’s that are equipped with sound- sensor-based devices (e.g., or RCXs or Motes - which use the RF-based protocols rather than the constraining IR protocols ) Explore using other display devices, e.g., PDAs, to receive resultant Morse codes (sound notes) for conversion and display