实现一个简单的串行鼠标控制器

Themouseisbecomingincreasinglypopularasa

standardpointingdataentrydevice.Thereisnodoubt

thatthedemandforthemouseisincreasing.Various

kindsofmicecanbefoundinthemarket,includingopti-

calmice,opto-mechanicalmice,andtheircloserela-

tive,trackballs.Themouseinterfacestothehostviaa

dedicatedinterfacecardoranRS-232port.Their

mechanismsareverysimilar.Themajorelectrical

componentsofamouseare:AN519ImplementingaSimpleSerialMouseControllerINTRODUCTIONTHEORYOFOPERATIONThemouseisbecomingincreasinglypopularasaAmousecanbedividedintoseveralfunctionalblocks:standardpointingdataentrydevice.ThereisnodoubtMicrocontrollerthatthedemandforthemouseisincreasing.VariousButtondetectionkindsofmicecanbefoundinthemarket,includingopti-calmice,opto-mechanicalmice,andtheircloserela-Motiondetectiontive,trackballs.Themouseinterfacestothehostviaa