changes.txt

开发工具:keil7 主要IC：at89c51sdnd1(atmel) 说明：mp3播放器详细设计方案

CHANGES - snd1-demof

               
ATMEL - 2002


CHANGES
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Version 1.0.0, December 21, 2001
- Creation

Version 1.0.2, January 24, 2002
- Change Long File Name management in FAT
- Fix bug when accessing files on card size > 32 Mb
- Fix bug when mass storage read is performed just after a write
- On-board DataFlash bug fix in player MP3 read

Version 1.2.0, March 28, 2002
- Support for generic USB mass storage drivers under windows 2K, ME, XP(TM)
- Allow format of DataFlash and MMC through the tool operating mode
- Full support for voice operating mode
- Full support of AT89C51SND1B in case of MP3 errors

Version 1.2.4, April 26, 2002
- Mass storage now supports win98(TM) and Linux(TM).
- Mass storage library implementation eases new memory support.
- MMC plug/unplug now supported during mass storage.
- MMC automatically selected (if present) when entering mass storage.
- Win98(TM) driver available.

Version 1.2.5, June 7, 2002
NEW FEATURES / ENHANCEMENT
- Mass storage now supports MAC OS9.
- Mass storage now supports multidrive on Win98(TM), WinXP(TM) and WinME(TM)
  Win2K(TM), MAC OS9 and Linus do not support multidrive.
- Mass storage library now reports 2 busy events:
  - sbc_wr_busy set when write command received
  - sbc_rd_busy set when read command received
  These events are cleared by the consumming task.
- USB plug-in detection enhanced to avoid spurious detection.
BUG FIX
- MMC is still working when USB unplug is done after a file write.
- No more "crack" when playing back voice file.