BASCOM-AVR利用AVR-DOS库读写SD卡

试验了用BASCOM读写SD卡，完全可以把SD卡当作磁盘来操作，与VB/QB语法兼容，编程非常简单。

　　AVR-DOS介绍
　　Features:
           ·  Read and writeASCII-Files
·  Read and writeBinary-Files
·  Drivers available forCompact Flash Cards, Hard disk, MMC, SD etc.
·  Completly integrated inBASCOM-AVR Compiler
·  QB/VB compatible syntax
·  Completly written inAVR-Assembler (fast and compact)
　　It workswith:
           ·  DOS-FAT16 and FAT32 formatted partitions
·  Files in Root directory and sub directories
·  Short DOS File names (8.3)
·  Sector Size of 512 Bytes(nearly all CF-Cards and HD)
·  Linear sector addressing(LBA-Mode). (all newer CF-Cards and HD). C/H/S-Mode of old HD is not supported.
  
　　Please note: AVR-DOS is only free for noncommercial use. For commercial use, or when you are interested in ASM-Code andcomplete documentation please check Licensedirectives

　　Functions:
　　Hereis a list of all in BASCOM-AVR integrated statements, which uses AVR-DOSfunctionality.

　　Disk/Directory:
            ·  InitFileSystem ()
·  DiskSize
·  DiskFree
·  Kill
·  Dir ([ ])
·  FileLen ([ ])
·  FileDateTime ([ ])
·  FileDate ([ ])
·  FileTime ([ ])
·  GetAttr ([ ])   
·  NameAs    
·  ChDir])   
·  MkDir])   
·  RmDir])   
　　File create, open, read, write, close:
           ·  FreeFile
·  Open ForInput/Output/Append/Binary as #
·  Close
·  Flush []
·  Print #,Variable1; Variable2; …
·  Write #,Variable1, Variable2, …
·  Input #,Variable1, Variable2, …
·  Line Input #,StringVariable
·  Get #, [,]
·  Put #, [,]
·  Seek #[,]
　　Infos about opened files:
            ·  EOF (#)
·  LOC (#)
·  LOF (#)
·  FileAttr (#)
　　Others:
            ·  Bload ,<SRAM-Address>
·  Bsave ,,