read_u_b.h

c8051f020+CH375读写U盘文件的程序

sbit USB_CSb  = P1^5;
sbit USB_WRb  = P1^4;
sbit USB_A0b  = P1^2;
sbit USB_RDb  = P1^3;
sbit USB_INTb = P1^6;



#ifdef USB_EXT
  unsigned char sect_clust_b;
  unsigned int byte_sect_b;
  unsigned char hidd_sect_b;
  unsigned int resv_sect_b;
  unsigned int sect_fat_b; 
  unsigned long root_b;
  unsigned long Sect_Ofst_b;
  unsigned int St_Ofst_b;

#else
  extern unsigned long Sect_Ofst_b;
  extern unsigned int St_Ofst_b;
  extern unsigned char sect_clust_b;
  extern unsigned int byte_sect_b;
  extern unsigned char hidd_sect_b;
  extern unsigned int resv_sect_b;
  extern unsigned int sect_fat_b;
  extern unsigned long root_b;
#endif