PICmicro器件编程：你总想知道（但不知道是问谁）

Thereisalotmaterialoutthereaboutmicrocontroller

programming.Mostofitfocusesonthesoftwaresideof

things–orthogonalinstructionsets,codeoptimization,

high-levellanguageprogrammingtricksandtweaksin

assemblerenvironments,eventakingadvantageofa

device’speculiaritiestomakeitdowhatyouwant.This

is,ofcourse,averygoodthing,asmicrocontrollersend

updoingmorecomplextasksinmoresophisticated

applications,theabilitytowriteelegantcodebecomes

moreandmorevaluable.

Whatdoesn’tgetmentionedasoftenisthelastkeypart

oftheprocess:actuallygettingthatelegantcodeinto

themicrocontrolleritself.Theauthorstillremembers

wellhisfirstexperience,inthedaysbeforeMicrochip

evenexisted,oftryingtopiecetogetherseveral

hardwarespecificationsinordertofigureouthowthe

programmingprocesswassupposedtowork.True,

deviceprogrammingisavitalstep,butitdoesn’t

alwaysgettheattentionitdeserves.

Thatbringsustothepointofthisapplicationnote.For

morethanadecade,Microchiphaspublishedalotof

informationaboutprogrammingits8-bitmicro-

controllers.Thereisnowsomuchinformationout

there,infact,thatit’ssometimeshardforengineers

andtechnicianswhoareunfamiliarwithMicrochip

productstoknowwheretostart.Thepurposeofthis

paperistoprovidetheentrypointforinformationon

programmingMicrochip’s8-bitmicrocontrollers.While

wecan’tcovereveryprogrammingspecificationin

detail,wecangiveyouagoodideaofhowtheprocess

worksandshowyouwhattolookforinaspecification.

We’llalsotouchbrieflyonhowin-systemprogramma-

bilitycanaffectanapplication’sdesignandfinishwith

otherprogramminganddiagnosticinnovationsthat

makeapplicationsmorereliable.AN910PICmicroDeviceProgramming:WhatYouAlwaysWantedtoKnow(ButDidn’tKnowWhotoAsk)Author:EricSomervilleTHEBASICSMicrochipTechnologyInc.Ifyou’vehadpreviousexperiencewithprogrammingmicrocontrollers,you’realreadyfamiliarwiththebasicINTRODUCTIONissue:amicrocontrollerinanembeddedapplicationisnotacomputer.Thereisnoconvenientbuilt-inGUIforThereisalotmaterial