keil如何定义头文件？

#include "REG_MPC82G516.H"

如果找不到这个文件，自己建一个，下面是内容
// MPC82G516

// (System)
sfr ACC = 0xE0;
sfr B = 0xF0;
sfr SP = 0x81;
sfr DPL = 0x82;
sfr DPH = 0x83;
sfr PSW = 0xD0;

// (Interrupt)
sfr IE = 0xA8;
sfr AUXIE = 0xAD;
sfr XICON = 0xC0;
sfr IP = 0xB8;
sfr IPH = 0xB7;
sfr AUXIP = 0xAE;
sfr AUXIPH = 0xAF;

// (I/O Port)
sfr P0 = 0x80;
sfr P1 = 0x90;
sfr P2 = 0xA0;
sfr P3 = 0xB0;
sfr P4 = 0xE8;
sfr P0M0 = 0x93;
sfr P0M1 = 0x94;
sfr P1M0 = 0x91;
sfr P1M1 = 0x92;
sfr P2M0 = 0x95;
sfr P2M1 = 0x96;
sfr P3M0 = 0xB1;
sfr P3M1 = 0xB2;
sfr P4M0 = 0xB3;
sfr P4M1 = 0xB4;

// (Timer)
sfr TCON = 0x88;
sfr TMOD = 0x89;
sfr T2CON = 0xC8;
sfr T2MOD = 0xC9;
sfr RCAP2L = 0xCA;
sfr RCAP2H = 0xCB;
sfr TL0 = 0x8A;
sfr TH0 = 0x8C;
sfr TL1 = 0x8B;
sfr TH1 = 0x8D;
sfr TL2 = 0xCC;
sfr TH2 = 0xCD;

// (Serial Port)
sfr SCON = 0x98;
sfr SBUF = 0x99;
sfr SADDR = 0xA9;
sfr SADEN = 0xB9;
sfr S2CON = 0xAA;
sfr S2BRT = 0xBA;
sfr S2BUF = 0x9A;

// (ADC)
sfr ADCTL = 0xC5;
sfr ADCH = 0xC6;
sfr ADCL = 0xBE;
sfr ADC = 0xC6; //the same as ADCH, the higher 8 bits

// (Keypad Interrupt)
sfr KBCON = 0xD6;
sfr KBPATN = 0xD5;
sfr KBMASK = 0xD7;

// (SPI)
sfr SPCTL = 0x85;
sfr SPDAT = 0x86;
sfr SPSTAT = 0x84;

// (PCA)
sfr CCON = 0xD8;
sfr CMOD = 0xD9;
sfr CL = 0xE9;
sfr CH = 0xF9;
sfr CCAPM0 = 0xDA;
sfr CCAPM1 = 0xDB;
sfr CCAPM2 = 0xDC;
sfr CCAPM3 = 0xDD;
sfr CCAPM4 = 0xDE;
sfr CCAPM5 = 0xDF;
sfr CCAP0H = 0xFA;
sfr CCAP0L = 0xEA;
sfr CCAP1H = 0xFB;
sfr CCAP1L = 0xEB;
sfr CCAP2H = 0xFC;
sfr CCAP2L = 0xEC;
sfr CCAP3H = 0xFD;
sfr CCAP3L = 0xED;
sfr CCAP4H = 0xFE;
sfr CCAP4L = 0xEE;
sfr CCAP5H = 0xFF;
sfr CCAP5L = 0xEF;
sfr PCAPWM0 = 0xF2;
sfr PCAPWM1 = 0xF3;
sfr PCAPWM2 = 0xF4;
sfr PCAPWM3 = 0xF5;
sfr PCAPWM4 = 0xF6;
sfr PCAPWM5 = 0xF7;

// (Others)
sfr PCON = 0x87;
sfr PCON2 = 0xC7;
sfr AUXR = 0x8E;
sfr AUXR1 = 0xA2;
sfr AUXR2 = 0xA6;
sfr STRETCH = 0x8F;
sfr EVRCR = 0x97;
sfr WDTCR = 0xE1;

// (ISP)
sfr ISPCR = 0xE7;
sfr IFMT = 0xE5;
sfr IFD = 0xE2;
sfr IFADRH = 0xE3;
sfr IFADRL = 0xE4;
sfr SCMD = 0xE6;

// (bits in PSW)
sbit CY = PSW^7;
sbit AC = PSW^6;
sbit F0 = PSW^5;
sbit RS1 = PSW^4;
sbit RS0 = PSW^3;
sbit OV = PSW^2;
sbit P = PSW^0;

// (bits in IE)
sbit EA = IE^7;
sbit ET2 = IE^5;
sbit ES = IE^4;
sbit ET1 = IE^3;
sbit EX1 = IE^2;
sbit ET0 = IE^1;
sbit EX0 = IE^0;

// (bits in IP)
sbit PT2 = IP^5;
sbit PS = IP^4;
sbit PT1 = IP^3;
sbit PX1 = IP^2;
sbit PT0 = IP^1;
sbit PX0 = IP^0;

// (bits in SCON)
sbit FE = SCON^7;
sbit SM0 = SCON^7;
sbit SM1 = SCON^6;
sbit SM2 = SCON^5;
sbit REN = SCON^4;
sbit TB8 = SCON^3;
sbit RB8 = SCON^2;
sbit TI = SCON^1;
sbit RI = SCON^0;

// (bits in TCON)
sbit TF1 = TCON^7;
sbit TR1 = TCON^6;
sbit TF0 = TCON^5;
sbit TR0 = TCON^4;
sbit IE1 = TCON^3;
sbit IT1 = TCON^2;
sbit IE0 = TCON^1;
sbit IT0 = TCON^0;

// (bits in T2CON)
sbit TF2 = T2CON^7;
sbit EXF2 = T2CON^6;
sbit RCLK = T2CON^5;
sbit TCLK = T2CON^4;
sbit EXEN2 = T2CON^3;
sbit TR2 = T2CON^2;
sbit C_T2 = T2CON^1;
sbit CP_RL2 = T2CON^0;

// (bits in CCON)
sbit CF = CCON^7;
sbit CR = CCON^6;
sbit CCF5 = CCON^5;
sbit CCF4 = CCON^4;
sbit CCF3 = CCON^3;
sbit CCF2 = CCON^2;
sbit CCF1 = CCON^1;
sbit CCF0 = CCON^0;

// (bits in XICON)
sbit PX3 = XICON^7;
sbit EX3 = XICON^6;
sbit IE3 = XICON^5;
sbit IT3 = XICON^4;
sbit PX2 = XICON^3;
sbit EX2 = XICON^2;
sbit IE2 = XICON^1;
sbit IT2 = XICON^0;

// (bits in P0)
sbit P07 = P0^7;
sbit P06 = P0^6;
sbit P05 = P0^5;
sbit P04 = P0^4;
sbit P03 = P0^3;
sbit P02 = P0^2;
sbit P01 = P0^1;
sbit P00 = P0^0;

// (bits in P1)
sbit P17 = P1^7;
sbit P16 = P1^6;
sbit P15 = P1^5;
sbit P14 = P1^4;
sbit P13 = P1^3;
sbit P12 = P1^2;
sbit P11 = P1^1;
sbit P10 = P1^0;

// (bits in P2)
sbit P27 = P2^7;
sbit P26 = P2^6;
sbit P25 = P2^5;
sbit P24 = P2^4;
sbit P23 = P2^3;
sbit P22 = P2^2;
sbit P21 = P2^1;
sbit P20 = P2^0;

// (bits in P3)
sbit P37 = P3^7;
sbit P36 = P3^6;
sbit P35 = P3^5;
sbit P34 = P3^4;
sbit P33 = P3^3;
sbit P32 = P3^2;
sbit P31 = P3^1;
sbit P30 = P3^0;

// (bits in P4)
sbit P43 = P4^3;
sbit P42 = P4^2;
sbit P41 = P4^1;
sbit P40 = P4^0;

// (bits in P1, alternate)
sbit T2EX = P1^1;
sbit T2 = P1^0;
sbit S2TXD = P1^3;
sbit S2RXD = P1^2;
sbit SPI_CLK = P1^7;
sbit SPI_MISO = P1^6;
sbit SPI_MOSI = P1^5;
sbit SPI_SS = P1^4;
sbit CEX5 = P1^7;
sbit CEX4 = P1^6;
sbit CEX3 = P1^5;
sbit CEX2 = P1^4;
sbit CEX1 = P1^3;
sbit CEX0 = P1^2;
sbit ECI = P1^1;

// (bits in P3, alternate)
sbit RD = P3^7;
sbit WR = P3^6;
sbit T1 = P3^5;
sbit T0 = P3^4;
sbit INT1 = P3^3;
sbit INT0 = P3^2;
sbit TXD = P3^1;
sbit RXD = P3^0;
sbit S2CKO = P3^5;
sbit T0CKO = P3^4;

// (bits in P4, alternate)
sbit INT2 = P4^3;
sbit INT3 = P4^2;