I got a Xplained 1284p board and wanted to read its flash memory (under Windows 10).
I followed the instructions of AVR370 and started following commands:
mode com5 baud=57600 parity=n data=8
avrosp –dATmega128 –cCOM5 -rf -ofmega_1284p_xplained_example_read.hex
getting following reply:
AVR Open-source Programmer $Revision: 1163 $ (C) 2004 Atmel Corp.
Serial port timeout set to 5 sec.
An error occurred:
[Timeout during COM-port read operation!]
I made also several tests with AVRDUDE but here too I always got errors.