CS4101嵌入式系统概论FinalProjectAssignment.ppt

CS4101 嵌入式系統概論Final Project Assignment 金仲達教授 國立清華大學資訊工程學系 11/17/2011 (Materials from MSP430 Microcontroller Basics, John H. Davies, Newnes, 2008) Overview You are free to choose from: 定題組: Morse Code Encoder/Decoder Use MSP430 to input and output Morse Code Use PCM-7230 to process Morse Code 不定題組: Propose you idea and implement it Two persons per group Schedule: 12/1: finalize choice and submit proposal (不定題組) 12/1~1/5: progress reports 1/16~1/18: demo and final report 定題組: Morse Code Codec Morse Code Codec Goal: implement a Morse Code Encoder/decoder using PCM-7230 and MSP430 RS232 Morse codeinput Morse codeoutput Morse Code Invented by Samuel F. B. Morse (1791-1872), an American painter He, and some others, conceived idea ofan electromagnetic telegraph in 1832, and produced the first working telegraph set in 1836(/writing/morsecode.htm) A method of transmitting textual information as a series of short and long signals called dots and dashes”, or dits and dahs” The signals may be on-off tones, lights, clicks, … Morse Code Representation International Morse code is composed of five elements: Short mark, dot or dit (·): dot duration is one unit Longer mark, dash or dah (–): three units long Inter-element gap between the dots and dashes within a character: one dot duration or one unit long Short gap (between letters): three units long Medium gap (between words): seven units long (/wiki/Morse_code) Morse Code Representation If we further define a unit as a bit, we can visualize any Morse code sequence as a combination of the following five elements: Short mark, dot or dit (·): 1 Longer mark, dash or dah (–): 111 Intra-character gap (between the dots and dashes within a character): 0 Short gap (between letters): 000 Medium gap (between words): 0000000 (/wiki/Morse_code) Morse Code Letters and Numerals (/wiki/Morse_code) Morse Code Encoding dot dash Example -- --- ·-· ··· · -·-· --- -·· · M O R S E C O D E Verbal representation:dah-