GPS電路實作

Abstract

(1)目的 : 主要實踐課堂上老師所授予我們的內容，以及了解GPS相關電路和訊息的接收和處理。

(2)過程及方法 : 此次GPS電路是以Arduino UNO 這塊板子來做為它的中心處理器，並以一塊GPS模組接上一條天線用來接收GPS訊號，將收到的GPS訊號送到Arduino UNO板子在由此板子把訊號經過字串處理後經由電腦的Serial Port使電腦螢幕顯示GPS相關訊息，以及送往在電路板上的LCD顯示器，顯示時間以及經緯度，來完成定時以及定位功能。

(3)結果 : 這次的結果主要分成兩部分，第一部分是沒有經過字串處理的訊息，完全的把從GPS收到的訊號完整地呈現在電腦螢幕，像是GPRMC等等封包；第二部分則是有經過字串處理，由Arduino UNO板子將所收到的GPS訊息藉由判斷封包的名子來了解它的資料結構，並將之把我們所需之訊息(時間、經緯度)切割出來並將它送往電腦以及LCD顯示器上。 第一部分所獲得的結果都是衛星傳送給電路的直接訊息要靠了解它封包的資料結構才能完成，且LCD因為螢幕的限制並無法正確顯示；第二部分的結果是經過字串處理，可以很直觀的了解現在時間以及經緯度，且能顯示在LCD顯示器上。

Abstract 1. Purpose: Mainly practice teacher granted in class, and to realize the GPS associated circuitry and signal receive、process.

2. Procedure and Method: This GPS circuit is based on the board of Arduino UNO, Arduino UNO is the central processor of board. Use a GPS module connecting an antenna for receiving GPS signal. Then sent the receiving GPS signal to the Arduino UNO board which use the signal to do string handling, finally the board sent the processed signal through PC's serial port making the PC screen display relative signal of GPS, another monitor is the on board LCD module, display time, latitude and longitude.

3. Result: The result mainly divided into two parts, first part the signal is not string handling, sent the fully GPS signal making PC screen display, likes the packet of GPRMC；second part the signal is string handling, Arduino UNO board sent the receiving GPS signal by determine the name of packets and then realize it's data structure, finally display on PC monitor and LCD module the useful imformation likes time, latitude and longitude. First part the result are all the satellite sent the signal to the circuit and fully done by realize the packet's data structure, and LCD module has limit due to it's monitor；second part the result is string handling, it can direct realize about the time latitude and longitude, and can display on the LCD module.