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Old 03-23-2008, 08:51 PM
Robert L Cochran
 
Default Accessing USB Programmer With avrdude

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@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)

This is what lsusb says:

[root@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

*


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Old 03-24-2008, 12:02 AM
John Summerfield
 
Default Accessing USB Programmer With avrdude

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@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@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

*





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Cheers
John

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