I cannot force Avrdude to use a connected USB based programmer.

Invoking avrdude with -vv option yields this:

System wide configuration file is "/etc/avrdude.conf"
User configuration file is "/home/user/.avrduderc"
User configuration file does not exist or is not a regular file, skipping
Using Port : /dev/bus/usb/003/007
Using Programmer : usbasp-clone
avrdude: usbasp_open("/dev/bus/usb/003/007")
avrdude: Warning: cannot open USB device: Permission denied
avrdude: error: could not find USB device with vid=0x16c0 pid=0x5dc
avrdude: usbasp_close()

avrdude done. Thank you.


A part of my /etc/udev/rules.d/USBasp.rules is as follows:

USBasp programmer
ATTRS{vid}=="0x16c0", ATTRS{pid}=="0x5dc", GROUP="usb", MODE="0666"


dmesg according to a this programmer shows this:

[ 3052.476551] usb 3-1.2: new low-speed USB device number 8 using ehci-pci
[ 3052.562281] usb 3-1.2: New USB device found, idVendor=16c0, idProduct=05dc
[ 3052.562292] usb 3-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 3052.562298] usb 3-1.2: Product: USBasp
[ 3052.562303] usb 3-1.2: Manufacturer: www.fischl.de


port manually entered in a Burn O Mat (Gui for Avrdude) settings is:

/dev/bus/usb/003/007


How can I fix that ?

Despite your custom udev rule, what happens if you try as root (I assume that you restarted udevd after setting that rule)?

I rebooted my machine instead restarting udevd - is this way OK ?

I also tried to run it as a root:

bash-4.3# /usr/bin/avr8-burn*
/usr/bin/avr8-burn-o-mat: line 3: java: command not found
bash-4.3#

but there's a problem (?) with invoking java as a root ; avr8-burn-o-mat is a java front-end for a
CLI avrdude.

To try as root, just adapt root's PATH accordingly, or simply run your application like this: JAVA=<path/to/java> <command>. And check that JAVA_HOME, is set to /usr/lib/java.

PS Did you install java?

Yes, I have Java "1.7.0_51".

Invoking:

/usr/bin/avr8-burn*

as a user properly starts the software.

Invoking it as a root does not. as I've shown in my previous post.

Try "su -" to see if You then get java in your PATH!

The "su -" worked, thanks !

Now it is the time to find a way to run it all in a user mode.
Any ideas ?

Maybe change Your udev.rules from:

ATTRS{vid}=="0x16c0", ATTRS{pid}=="0x5dc", GROUP="usb", MODE="0666"

to this (without the 0x):

ATTRS{idVendor}=="16c0", ATTRS{idProduct}=="05dc", GROUP="usb", MODE="0666"

So it matches the values from dmesg:

....
New USB device found, idVendor=16c0, idProduct=05dc
....


And probably reload the udevrules

EDIT: Why GROUP usb, it's not a group found in Slackware!

Enjoy

Wow , this syntax correction worked well !
Thank you !!!