add code

REG51.h

@@ -0,0 +1,91 @@
+/*--------------------------------------------------------------------------
+REG51.H
+
+Header file for generic 80C51 and 80C31 microcontroller.
+Copyright (c) 1988-2002 Keil Elektronik GmbH and Keil Software, Inc.
+All rights reserved.
+--------------------------------------------------------------------------*/
+
+#ifndef __REG51_H__
+#define __REG51_H__
+
+/*  BYTE Register  */
+sfr P0   = 0x80;
+sfr P1   = 0x90;
+sfr P2   = 0xA0;
+sfr P3   = 0xB0;
+sfr PSW  = 0xD0;
+sfr ACC  = 0xE0;
+sfr B    = 0xF0;
+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 IE   = 0xA8;
+sfr IP   = 0xB8;
+sfr SCON = 0x98;
+sfr SBUF = 0x99;
+
+
+/*  BIT Register  */
+/*  PSW   */
+sbit CY   = 0xD7;
+sbit AC   = 0xD6;
+sbit F0   = 0xD5;
+sbit RS1  = 0xD4;
+sbit RS0  = 0xD3;
+sbit OV   = 0xD2;
+sbit P    = 0xD0;
+
+/*  TCON  */
+sbit TF1  = 0x8F;
+sbit TR1  = 0x8E;
+sbit TF0  = 0x8D;
+sbit TR0  = 0x8C;
+sbit IE1  = 0x8B;
+sbit IT1  = 0x8A;
+sbit IE0  = 0x89;
+sbit IT0  = 0x88;
+
+/*  IE   */
+sbit EA   = 0xAF;
+sbit ES   = 0xAC;
+sbit ET1  = 0xAB;
+sbit EX1  = 0xAA;
+sbit ET0  = 0xA9;
+sbit EX0  = 0xA8;
+
+/*  IP   */ 
+sbit PS   = 0xBC;
+sbit PT1  = 0xBB;
+sbit PX1  = 0xBA;
+sbit PT0  = 0xB9;
+sbit PX0  = 0xB8;
+
+/*  P3  */
+sbit RD   = 0xB7;
+sbit WR   = 0xB6;
+sbit T1   = 0xB5;
+sbit T0   = 0xB4;
+sbit INT1 = 0xB3;
+sbit INT0 = 0xB2;
+sbit TXD  = 0xB1;
+sbit RXD  = 0xB0;
+
+/*  SCON  */
+sbit SM0  = 0x9F;
+sbit SM1  = 0x9E;
+sbit SM2  = 0x9D;
+sbit REN  = 0x9C;
+sbit TB8  = 0x9B;
+sbit RB8  = 0x9A;
+sbit TI   = 0x99;
+sbit RI   = 0x98;
+
+#endif