changes.txt

MP3设计源代码 使用atmel的单片机

CHANGES - snd1c-demo-df-sd-3_0_0


ATMEL - 2003


CHANGES
-------
## Version 3.0.0, May 28, 2003
  - New architecture
  - New memory task management
  - New file system management
  - FAT optimization and bug fix
  - Fix bug on mass strorage unplugger while load/download
  - Fix bug for MP3 over-consumption after power-up

## Version 2.2.1, March 27, 2003
  BUG FIX
- File delete when no file are present in dir (fat.c module)


## Version 2.2.0, March 19, 2003
  NEW FEATURES
- Player can now play all files located in sub-directories
- Player can now start playing after power-up

  BUG FIX
- Sub-directory management
- Bad writing at end-of_disk
- File size to 0 after small file creation
- Volume auto-inc stop after few seconds
- Mass Storage MAC OS9 support


## Version 2.0.0, November 8, 2002
  NEW FEATURES
- 44.1KHz/320KBs frames now supported for products with date code >= 0243
- File delete function for MP3 or WAV files
- Repeat A/B feature
- Fast forward/rewind feature
- Keyboard auto-repeat feature
- Win98 write protect support
- Linux multidrive support
- Generic file creation in FAT module
  Bug FIX
- Win98 write protect support
- SCSI support for all NF size up to 128MB


## Version 1.9.93, September 20, 2002
-- Unstable Version --
  BUG FIX
- Last MP3 file cluster corruption when recording voice in FAT16.


## Version 1.9.92, September 17, 2002
-- Unstable Version --
  NEW FEATURES
- Support for write protect flag in SCSI SBC library using demob lock key.
  BUG FIX
- First MP3 file corruption when recording voice in FAT16.
- Win98 mass storage drivers crash with V1.9.9 revision.


## Version 1.9.9, September 6, 2002
-- Unstable Version --
  NEW FEATURES / ENHANCEMENT
- Support for AT89C51SND1C with USB ping-pong.
- Voice mode now allows to create wav file in FAT.


## 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.
- NF no more need long start-up time.
  BUG FIX
- MMC is still working when USB unplug is done after a file write.
- No more "crack" when playing back voice file.


## 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 1.2.1, April 5, 2002
- Bug fix in NF drivers when reading a card above 32 Mbytes. 


## Version 1.2.0, March 28, 2002
- Support for generic USB mass storage drivers under windows 2K, ME, XP (TM)
- Compliant with Smartmedia implementation recommendations 
- 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 1.0.2, 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 1.0.0, December 21, 2001
- Creation