stk500v2 bootloader corrupts data when reading EEPROM

[mlasevich]

READ_EEPROM command treats each address as 16bit instead of 8bit, as a result, the output of read EEPROM is corrupt, giving every other byte.

[mcuee]

This may be related. It does not seem to be an avrdude issue but rather the issue of the bootloader.

• [bug #61169] Bad EEPROM read on mega2560 R3 Arduino board avrdudes/avrdude#515

[mcuee]

I can confirm that #24 fixed this issue.

• Fix stk500v2 READ_EEPROM to properly read EEPROM #24

[mcuee]

For those who want to use an Arduino Core with the fix, you can use this one.
https://github.com/MCUdude/MegaCore

It has incorported #24 fix here.
MCUdude/MegaCore@eba4f4a

[mcuee]

The zip file here contains this EEPROM fix and a few other fixes.

• Arduino ATmega2560 stk500v2 (Wiring) bootloader issue avrdudes/avrdude#1379 (comment)

[per1234]

If I understand correctly, #129 is a duplicate of this issue. Since #129 has a bit more information, I'll close this one in favor of the other.