readme.txt

使用AVR单片机M162制做的MP3,这是整机的代码.可做参考.

yampp-7 Bootloader version 5

changes:
v5 - 2004-02-16  MIS
!!! bootloader only for ATmega162 in M162 native mode.
- reduced size of bootloader to 256 bytes and moved it to 0x3F00 address
  this need setup BOOTSZ fuses to both BOOTSZ0 and BOOTSZ1 unprogrammed
  Don't forgot uncomment the #define BOOTLOADER_V5 definition in main
  firmware "Constants.h" file.

v3 - 2004-01-18  MIS
- added compatibility with Mega162 CPU (enabling RWW section)
  If you try use old bootloader with Mega162 in not M161 compatibility mode, 
  after update firmware the player locks, and you need disconnect battery for
  a moment. In this version all work ok.

If you load bootloader to ATmega161 or ATmega162 with COMPAT fuse setted
use "y7_boot_M161C_mode.rom" or y7_boot_M161C_mode.hex" file.

If you load bootloader to ATmega162 in native mode
use "y7_boot_M162_mode.rom" or y7_boot_M162_mode.hex" file.

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v2.1 - 2003-04-05  MIS
- added exit from bootloader after STOP keypress  (if you accidentally enter into 
  bootloader). You not must open case yet, simply press STOP key.
- removed not used delay stuff