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Trouble using AVRISP mkII to read flash of ATMega32U4

2013-11-18 by edjubenville@att.net

Newbie here... I need to save the program of a development board with an ATMega32U4 installed before I overwrite it with a new program. I'm trying to use avrdude included with WinAVR to do this using an AVRISP mkII programmer.

The programmer shows up at COM9. I edited the avrdude.conf file to set the default comport. I tried the following avrdude command line to read it:

c:\WinAVR-20100110\bin\avrdude.exe -p m32u4 -c stk500v2 -U flash:r:"c:\save.bin":r

That didn't work. It gave me a bunch of timeout messages like this:
avrdude.exe: stk500_2_ReceiveMessage(): timeout

For all I know, the previously loaded firmware may have been programmed with protection to prevent readback. Is this the symptom I would see?

Any debugging suggestions would be appreciated!

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