Accessing USB Programmer With avrdude

[John Summerfield]

Robert L Cochran wrote:
> I'm having trouble trying to access a USB device under Fedora 7. I think
> udev might be my problem.
> 
> When I try using avrdude with this line:
> 
> [rlc at bobcp4 atmega644]$ avrdude -c usbtiny -p m644 -P usb -U
> flash:w:blink_pb3.hex
> 
> I get this error message:
> 
> avrdude: Error: Could not find USBtiny device (0x1781/0xc9f)
Try with a leading zero. .../0x0c9f

> 
> This is what lsusb says:
> 
> [root at bobcp4 ~]# lsusb
> Bus 001 Device 001: ID 0000:0000 
> Bus 003 Device 001: ID 0000:0000 
> Bus 004 Device 006: ID 0e6a:6001 Megawin Technology Co., Ltd
> Bus 004 Device 005: ID 0424:2228 Standard Microsystems Corp.
> Bus 004 Device 004: ID 0424:2602 Standard Microsystems Corp.
> Bus 004 Device 002: ID 0424:2502 Standard Microsystems Corp.
> Bus 004 Device 001: ID 0000:0000 
> Bus 002 Device 002: ID 1781:0c9f 
> Bus 002 Device 001: ID 0000:0000 
> 
> And the device is described here:
> 
> http://ladyada.net/make/usbtinyisp/
> 
> (I bought the kit and built it.)
> 
> I added a rule named '98-usbtiny-rules' to /etc/udev/rules.d which
> contains this line
> 
> *SUBSYSTEM=="usb", SYSFS{idVendor}=="1781", SYSFS{idProduct}=="0c9f",
> GROUP="users", MODE="0660"
> 
> But avrdude still can't seem to find the programmer. Am I right in
> believing that I need a udev rule, and if so, does the above rule look
> correct for what I want to do? Or am I missing another issue?
> 
> Thanks
> 
> Bob Cochran
> Greenbelt, Maryland, USA
> 
> *
> 
> 


-- 

Cheers
John

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