便携式心电仪显示模块的设计和实现.pdf

中文摘要摘要:显示模块是心电设备的重要组成部分,为心电设备提供人机交互和显示效果的支持。好的人机交互和显示效果可以方便用户操作心电仪和观察心电数据,对准确判断至关重要。本文针对心电仪显示模块的改进提出了升级设计与实现方案。首先,描述了触摸屏替代键盘模块。通过对电阻式触摸屏及其控制器ADS7843 工作原理的分析,设计实现了利用C8051F120微控制器内部资源的触摸屏控制电路,并实现了电阻式触摸屏的驱动。该触摸屏控制电路,不仅提高了微控制器的利用率,简化了系统的硬件,而且增加了系统可靠性。其次,详细介绍了LCD部分。硬件设计上,通过比较分析当前不同的LCD 模块和LCD接口类型,以降低心电仪的功耗、成本为设计前提,确定继续采用 C8051F120微控制器为主控芯片,液晶屏选用夏普的LQ043T3DX02。随后依据 LCD时序要求引出了时序信号产生控制芯片XC2C64A,并最终确定了LCD显示模块构成。软件方面,则主要完成以下几方面内容:l、LCD颜色的实现及调色板的设计:2、文件分配表及对XRAM的不同操作。3、汉字、半角、水平线、垂直线这几种基本显示函数的实现。4、Logo数据的压缩存储。最后,通过软件仿真,验证了几种基本显示函数的可行性,并对LCD更新数据的状况进行了测试。关键词:心电仪;LCD;触摸屏; 分类号: ABSTRACT ABSTRACT:rnle display modde is Rn important part ofECG device,and it provide puter interaction and display for the ECG puter interactionand display willmake the usel"8 operation the ECG or observe ECG dataeasily,these aleimportant fortheUSer’ thispaper,We presentanupdate designed andimplementation scheme forthedisplay module improve. Firstly,this paper describe the touch panel analyzing the resistive touch screen andtheworking theory of touchscreen controllerADS7843,we designed acontrol circuitofthetouch scTeell byusing C805 FMCU’S circuit not onlyimprove the resource utilization,simplify thesystem hardware,but improves thesystem reliability. Secondly,this paper introduce the LCD module in hardware design part,paring thedifferent LCD modules and thedifferent LCD interface types,we willcontinue to use C805 F 20MCU asthemastercontrolchipand selectthesharp’S LCD—LQ043T3DX02,because thelowerpowerconsumption and lowerprice ofECG device are We must ording with therequirement oftheLCD timing signals,We use XC2C54A togenerate thetiming signals,at lastwedetermined position ofthe LCD display software part,the pletes severalaspectshereinafter: implement ofthe colorofthe LCD and the design ofpalette; allocation tableand thedifferentoperation ofthe XRAM; implement ofdisplay Chinese characters,DBC