单片机使用状态机的键盘程序（ scm using state machine keyboard program）

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1、51单片机使用状态机的键盘程序（51SCMusingstatemachinekeyboardprogram）IalsosendkeyboardprogramsusingstatemachinestosupportsinglekeysanddoublebondsSinglekey,keyboard,status,program,joininthefun1headerfile:KeyBoard.h#ifndef_Key_Board_h_#define_Key_Board_h_#defineKey_Up0x3E//arrow#defineKey_Down0x3D//downarrow#defin

2、eKey_Add0x3B//add#defineKey_Sub//0x37reduction#defineKey_Enter//0x2F.#defineKey_Return0x1F//returnThekeycombination#define0x33//Key_LR.Maythisdefinitionotherkeycombinations......#defineKey_NULL//0xFFwithoutanykeysSeveralfunctionsinthestatement/externalcallsExternvoidKey_Board_Init(void);//keyboard

3、interfaceinitializationExternU8Read_Key(void);//readkeyfunctionreturnsthekeyboardbufferinkeyExternvoidKey_In(void);//handlekeyinputfunction,thetimerinterruptinthecallExternvoidKey_Board_Test(void);//keyboardinterfacetestfunction(usedonlyinthecommissioningphase)#endif2sourcefile:KeyBoard.c//#includ

4、e"includes.h"//publicheaderfiles#include"Key_Board.h""//keyboardbufferrelatedconstantsdefined#defineKeyBuffLen//8keydefinitionofringbufferlengthis8(thesizeofthebuffercanbefreelydefinedasgreaterthan0.)//defineakeyboardbufferstructureStructStruct_KeyBoardBuff{U8buff[KeyBuffLen];//keyringbufferU8in;/

5、/writekeyinstructions(writetimerinterrupt)U8out;//readkeyindicator(Reader)}Key;/*************************************************************************Prototypeoffunction:voidKey_Board_Init(void)Function:initializethekeyboardinterface,thatis,thekeybufferisclearedAfferentparameter:NoneReturnparam

6、eter:NoneGlobalvariables:directmanipulationofthekeyboardbufferstructureDesign:MinisterWeiamo73@126.comModificationdate:2007-9-5Remark:itiscalledonlyoncethepowerupisinitialized**************************************************************************/VoidKey_Board_Init(void){Memset(&Key,0,sizeof(Ke

7、y));}/*************************************************************************Prototypeoffunction:U8Read_Key(void)Function:readakeyvaluefromthekeybufferAfferentparameter:NoneReturnparameter:U8keyvalue,ifthebuffe