I want to backup the flash contents of some AVRs, I've found an AVRDUDE commant that has worked on other people.
$(AVRDUDE) $(PROGRAMMER) -p $(DEVICE) -U flash:r:flashdump.hex:i
I have used this but I receive this message. Can someone help me out?
avrdude -p m32u4 -c avrispmkII -e
avrdude: ser_open(): can't open device "unknown": No such file or directory
avrdude done. Thank you.
The first one that I used was this
student$ avrdude avrispmkII -p m32u4 -U flash:r:flashdump.hex:i
avrdude: no programmer has been specified on the command line or the config file
Specify a programmer using the -c option and try again
but as it said there was no specified programmer so I'm a little lost.