This document outlines a communication platform that allows users to connect with friends. It describes a system architecture with two hosts that can send and receive text, voice, and pattern messages through an Ethernet connection. The working tasks are also defined, including using a keyboard and keypad to send messages, an LCD to display messages, a microphone and audio output for voice calls, and a 7-segment display to show call time. Work is divided between implementing internal socket and thread functions versus external user interface elements. The goal is to enable group connections and eventually incorporate wireless communication.

1. Pine Line
0360250 邱聖倫
0360241 吳嘉彬
1
A simple tool to connect with your friends

2. Outline
 Introduction
 System Architecture
 Working Task
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3. Introduction
 A communication platform with simple available
component
 Connection will be built on Ethernet directly at
first version, and wireless part might be
implemented as enhancement
 Support group communication
 Communication form:
 Text
 Voice
 Pattern
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4. System Architecture
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User 1 User 2
send
send receive
Internet
LCD
LCDkeyboard
keyboard
audio output
audio output
receive
microphone
microphone
keypad
keypad
7 segment 7 segment

5. System Architecture
 Connection setup and sync(for counter)
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Host A
Host B
request
ok
complete
T T/2
start counting
T

6. Working Task
 Keyboard:
 Use USB interface to connect PS2 keyboard with
pxa270
 Keypad:
 Send stickers to receiver
 Start voice record
 LCD:
 Display messages/stickers on LCD
 LED:
 Number of group members
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7. Working Task
 Microphone:
 Use Codec to implement voice communication
 Voice Output:
 Use Codec to play the received voice message and
the sound when receiving message
 7-segment:
 Show the communication time
 Socket:
 Send/Receive text or voice message
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8. Division of works
嘉彬 聖倫
Internal functions External functions
Socket(send/receive)(2) Keyboard(2)
Threads(LCD/keyboard)(2) LCD(1)
Parameters(0.5) Keypad,LED(0.5)
Voice connection(1) Microphone/Voice output(2)
Sync time(0.5) 7-segment(0.5)
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After the above done, we will try to do a group connection
and wireless communication.