REG52.h就可以了，自己再增加幾個寄存器的定義就可以了，其實就是擴展RAM和看門狗。我一直是這么用516的，我的REG52.H:/**-----------------------------------------------------------------------------*Copyright(c)KEILELEKTRONIKGmbHandFranklinSoftware,Inc.,1987-1992*-----------------------------------------------------------------------------*/

/*8052ProcessorDeclarations*/

/*BYTERegisters*/

sfrP0=0x80;

sfrP1=0x90;

sfrP2=0xA0;

sfrP3=0xB0;

sfrP4=0xE8;/*W78E516*/

sfrCHPENR=0xf6;

sfrSFRAH=0xc5;

sfrSFRAL=0xc4;

sfrSFRFD=0xc6;

sfrSFRCN=0xc7;

sfrCHPCON=0xbf;

sbitP40=0xd8;

sbitP41=0xd9;

sbitP42=0xda;

sbitP43=0xdb;

sfrPSW=0xD0;

sfrACC=0xE0;

sfrB=0xF0;

sfrSP=0x81;

sfrDPL=0x82;

sfrDPH=0x83;

sfrPCON=0x87;

sfrTCON=0x88;

sfrTMOD=0x89;

sfrTL0=0x8A;

sfrTL1=0x8B;

sfrTH0=0x8C;

sfrTH1=0x8D;

sfrIE=0xA8;

sfrIP=0xB8;

sfrSCON=0x98;

sfrSBUF=0x99;/*8052Extensions*/

sfrT2CON=0xC8;

sfrRCAP2L=0xCA;

sfrRCAP2H=0xCB;

sfrTL2=0xCC;

sfrTH2=0xCD;/*BITRegisters*//*PSW*/

sbitCY=0xD7;

sbitAC=0xD6;

sbitF0=0xD5;

sbitRS1=0xD4;

sbitRS0=0xD3;

sbitOV=0xD2;

sbitP=0xD0;/*TCON*/

sbitTF1=0x8F;

sbitTR1=0x8E;

sbitTF0=0x8D;

sbitTR0=0x8C;

sbitIE1=0x8B;

sbitIT1=0x8A;

sbitIE0=0x89;

sbitIT0=0x88;/*IE*/

sbitEA=0xAF;

sbitES=0xAC;

sbitET1=0xAB;

sbitEX1=0xAA;

sbitET0=0xA9;

sbitEX0=0xA8;/*IP*/

sbitPS=0xBC;

sbitPT1=0xBB;

sbitPX1=0xBA;

sbitPT0=0xB9;

sbitPX0=0xB8;/*P3*/

sbitRD=0xB7;

sbitWR=0xB6;

sbitT1=0xB5;

sbitT0=0xB4;

sbitINT1=0xB3;

sbitINT0=0xB2;

sbitTXD=0xB1;

sbitRXD=0xB0;/*SCON*/

sbitSM0=0x9F;

sbitSM1=0x9E;

sbitSM2=0x9D;

sbitREN=0x9C;

sbitTB8=0x9B;

sbitRB8=0x9A;

sbitTI=0x99;

sbitRI=0x98;/*8052Extensions*//*IE*/

sbitET2=0xAD;/*IP*/

sbitPT2=0xBD;/*P1*/

sbitT2EX=0x91;

sbitT2=0x90;/*T2CON*/

sbitTF2=0xCF;

sbitT2IP=0xCE;

sbitRCLK=0xCD;

sbitT2IE=0xCD;

sbitTCLK=0xCC;

sbitT2RSE=0xCC;

sbitBGEN=0xCB;

sbitTR2=0xCA;

sbitC_T2=0xC9;

sbitCP_RL2=0xC8;

sfrAUXR=0x8E;

sfrWDT_CONTR=0xe1;