51单片机读写u盘(含源程序和原理图)

附件有51单片机加上sl811读写U盘的源程序和原理图

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

Header file for the low voltage Flash Atmel AT89C52 and AT89LV52.
Copyright (c) 1995-1996 Keil Software, Inc.  All rights reserved.
--------------------------------------------------------------------------*/

#ifndef AT89X52_HEADER_FILE
#define AT89X52_HEADER_FILE 1

/*------------------------------------------------
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 RCAP2L  = 0xCA;
sfr RCAP2H  = 0xCB;
sfr TL2     = 0xCC;
sfr TH2     = 0xCD;
sfr PSW     = 0xD0;
sfr ACC     = 0xE0;
sfr B       = 0xF0;