CM320240液晶模塊的驅動軟件設計

電子信息工程論文編號:DZXX294  論文字數:8733,頁數:33

目 錄
摘要 I
Abstract II
第1章 緒論 1
1.1 引言 1
1.2 開發背景 1
1.3 本文主要工作和研究內容 2
第2章 基于SED1335的液晶顯示模塊 3
2.1 CM320240-3BCWB簡介 3
2.2 硬件接口引腳介紹 4
第3章 SED1335指令集 5
第4章 驅動程序介紹 14
4.1 LCDDRIVE.H頭文件程序介紹 14
4.2 硬件接口層介紹 16
4.2.1 LCD Write Command()函數介紹 16
4.2.2 LCD_WriteData()函數介紹 16
4.3 LCM的用戶接口層介紹 17
4.3.1 void GUI_Initialize(void)函數介紹 17
4.3.2 LCD_Initialize()函數介紹 17
4.3.3 LCD_FillAll()函數介紹 19
4.3.4 LCD_UpdatePoint()函數介紹 20
4.4 與LCM相關的GUI接口函數介紹 21
4.4.1 void GUI_FillSCR(uint8 dat)函數介紹 21
4.4.2 void GUI_ClearSCR()函數介紹 21
4.4.3 GUI_Point()函數介紹 22
4.4.4 GUI_ReadPoint()函數介紹 23
4.4.5 GUI_HLine()函數介紹 23
4.4.6 GUI_RLine()函數介紹 24
4.5 測試函數介紹 25
致    謝 28
參考文獻 29

摘要

 液晶(Liquid Crystal)顯示技術的發展經歷了相當漫長的過程，液晶顯示屏幕大體上可分為液晶單色屏幕和液晶彩色屏幕兩種。液晶單色屏幕主要運用于電子手表、計算器、手持式游戲機等設備，它的主要優點是成本低廉；彩色屏的優點是色彩豐富，可以顯示靜態和動態的彩色圖片，但價格昂貴，多應用于手持設備及要求較高的場合。
 本課題在ARM LPC2214芯片下用C語言編程實現CM320240液晶模塊的驅動軟件設計，該模塊采用了專用于液晶驅動的SED1335芯片，為單色顯示。該芯片與MCU的接口簡單，軟件設計方便。由于C語言具有可直接操作硬件的特點而不用ARM匯編語言的抽象性和復雜性，大大簡少了工作量，本課題完成了液晶驅動的各軟件函數的設計，包括液晶屏幕的初始化函數、命令和數據讀寫函數、屏幕數據的填充和清除函數、以及點更新函數等。通過調用這些函數可以實現液晶屏幕各種數據和字符的顯示，并且具備一定的通用性。

關鍵字： 液晶顯示技術，SED1335芯片
Abstract
 The development of Liquid Crystal Display technology has experienced quite a long process, LCD screen can be generally divided into monochrome screen and color screen two kinds. Monochrome LCD screen is also called TN (Twisted Nematic)screen which mostly used in electronic watches, calculators, hand-portable game machines and other equipments, and the low price is its best advantagements. Color LCD screen has the advantage of rich colors and can display static and dynamic color photographs, but the price is higher. It is normally used in protable devices and critical occasions.
 Based on LPC2214 ARM chip, this dissertation uses C Language to complete CM320240 LCD Driver Software Design. This module use SED1335 LCD Driver IC for monochrome display. The MCU chip has simple interface and software design. As ARM Assembly Language is abstract and complex nature, by contrast with it, C Language has the characteristics of direct manipulation with the hardware which can greatly simplify the workload. Up to now, the dissertation has completed the function of the software design which includes LCD screen initialization function, orders and data to read and write function, screen data remove and fill function, update function and others. Calling these functions can display LCD screen data and characters. These functions can be used in other platforms.
 
Keywords: Liquid Crystal Display technology, SED1335 Chip Driver