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;