手绘绘画板设计报告

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1、手绘绘画板设计报告摘要：本设计室以msp430f5529单片机为主控芯片的手写输入设备，用普通PCB覆铜板作为信号采集部分，万用表表笔作为微小信号探测装置，当恒流源产生恒定电流通过覆铜板表面时，通过16位高精度ADADS1115测量出其与相邻两边电压值的差值来确定表笔在覆铜板上的准确位置，在用msp430f5529单片机开发板自带DogMatrix102*64液晶显示所测得坐标值的同时，在屏幕上显示探测表笔运动的轨迹。本设计主要采用的芯片有TI公司的电压放大器LM317，仪表放大器INA333,精密放大器OPA2234，高精度A/DA

2、DS1115以及MSP430F5529开发板。关键词：msp430f5529;微小信号;恒流源Abstract:Themaincontrollerofthisdesignismsp430f5529,anditwasdesignedforthehandheldproduct.WemadetheCopperCladLaminatesasourdetectdevice,Whentheconstantcurrentsourcegeneratesaconstantcurrentthroughthecoppercladlaminatesurfac

3、e,throughthe16bithighaccuracyA/DADS1115tomeasurethedifferencewiththeadjacentsidesvoltagevaluetodeterminetheexactlocationofpenonCCL,in102*64liquidcrystaldisplayofthemeasuredcoordinateswithSEED-EXP430F5529microcontrollerdevelopmentboardcomeswithDogMatrix,displaydetectiono

4、fpenmotiononthescreen.ThisdesignmainlyusesavoltageamplifierchipLM317,INA333instrumentationamplifier,precisionamplifierOPA2234,highaccuracyA/DADS1115andtheMSP430F5529developmentboard，AllofthechipsandboardsareproducedbyTIcompany.Keyword:msp430f5529;minutestsignals;constan

5、tcurrentsource11方案论证与比较..............................................................................................................................31.1主控芯片比较与论证............................................................................................................

6、......31.2恒流源方案比较与论证..............................................................................................................31.3AD方案的比较与论证.................................................................................................................41.4显示装置方案的比较

7、与论证......................................................................................................41.5滤波方案的比较与论证.........................................................................................................52系统设计........................................

8、......................................................................................................62.1总体设计