sfr.h

本程序是一个液晶时钟程序

/*---------------------------------------------------------------
AT89X52.H
-------*/

#ifndef __AT89X52_H__
#define __AT89X52_H__

/*----------------------------------
Byte Registers
---------------------------------*/
sfr P0      = 0x80;
sfr SP      = 0x81;
sfr DPL     = 0x82;
sfr DPH     = 0x83;
sfr PCON    = 0x87;
sfr TCON    = 0x88;
sfr TMOD    = 0x89;
sfr TL0     = 0x8A;
sfr TL1     = 0x8B;
sfr TH0     = 0x8C;
sfr TH1     = 0x8D;
sfr P1      = 0x90;
sfr SCON    = 0x98;
sfr SBUF    = 0x99;
sfr P2      = 0xA0;
sfr IE      = 0xA8;
sfr P3      = 0xB0;
sfr IP      = 0xB8;
sfr T2CON   = 0xC8;
sfr T2MOD   = 0xC9;
sfr TL2     = 0xCC;
sfr TH2     = 0xCD;
sfr PSW     = 0xD0;
sfr ACC     = 0xE0;
sfr B       = 0xF0;


/*------------------------------------------------
TCON Bit Registers
------------------------------------------------*/
sbit IT0  = 0x88;
sbit IE0  = 0x89;
sbit IT1  = 0x8A;
sbit IE1  = 0x8B;
sbit TR0  = 0x8C;
sbit TF0  = 0x8D;
sbit TR1  = 0x8E;
sbit TF1  = 0x8F;
/*------------------------------------------------
P1 Bit Registers
------------------------------------------------*/

sbit T2   = 0x90;       /* External input to Timer/Counter 2, clock out */
sbit T2EX = 0x91;       /* Timer/Counter 2 capture/reload trigger & dir ctl */

/*------------------------------------------------
SCON Bit Registers
------------------------------------------------*/
sbit RI   = 0x98;
sbit TI   = 0x99;
sbit RB8  = 0x9A;
sbit TB8  = 0x9B;
sbit REN  = 0x9C;
sbit SM2  = 0x9D;
sbit SM1  = 0x9E;
sbit SM0  = 0x9F;
/*------------------------------------------------
IE Bit Registers
------------------------------------------------*/
sbit EX0  = 0xA8;       /* 1=Enable External interrupt 0 */
sbit ET0  = 0xA9;       /* 1=Enable Timer 0 interrupt */
sbit EX1  = 0xAA;       /* 1=Enable External interrupt 1 */
sbit ET1  = 0xAB;       /* 1=Enable Timer 1 interrupt */
sbit ES   = 0xAC;       /* 1=Enable Serial port interrupt */
sbit ET2  = 0xAD;       /* 1=Enable Timer 2 interrupt */
sbit EA   = 0xAF;       /* 0=Disable all interrupts */
/*------------------------------------------------
P3 Bit Registers (Mnemonics & Ports)
------------------------------------------------*/

sbit RXD  = 0xB0;       /* Serial data input */
sbit TXD  = 0xB1;       /* Serial data output */
sbit T0   = 0xB4;       /* Timer 0 external input */
sbit T1   = 0xB5;       /* Timer 1 external input */
/*------------------------------------------------
Interrupt Vectors:
Interrupt Address = (Number * 8) + 3
------------------------------------------------*/
#define IE0_VECTOR	0  /* 0x03 External Interrupt 0 */
#define TF0_VECTOR	1  /* 0x0B Timer 0 */
#define IE1_VECTOR	2  /* 0x13 External Interrupt 1 */
#define TF1_VECTOR	3  /* 0x1B Timer 1 */
#define SIO_VECTOR	4  /* 0x23 Serial port */

#define TF2_VECTOR	5  /* 0x2B Timer 2 */
#define EX2_VECTOR	5  /* 0x2B External Interrupt 2 */

#endif