I just bought a new AVR Dragon and I am trying to use it in ISP mode with AVRDUDE.
AVRDUDE decides to default to LPT1 as the port. I then use "-P usb" but it reports "avrdude: usbdev_open(): did not find any USB device "usb""
I opened Device Manager, my AVR Dragon is said to be under "Port_#0002.Hub_#0005" so I tried "-P usb:2" and many other combinations of 2 and 5. I always get "avrdude: usbdev_open(): did not find any (matching) USB device "usb:something""
I've searched Google and this forum and everybody seems to be using "-P usb" and it seems to work fine for people.
If it is relevant, I'm running Windows 7 Ultimate 64 bit, and have WinAVR-20100110 with AVRDUDE 5.10 . I have upgraded the Dragon's firmware to the latest supplied with AVR Studio 4.18
How can I get this really really expensive programmer to work with AVRDUDE?