problem with udev rule on fedora 15

blue_bob · 06-22-2011, 09:26 AM

Hey everybody, I'm using avrdude, it's a programme to flash an atmel microcontroller via a usb adapter. My usb adapter is detected properly but I can only access when I'm root so I guess I did something wrong about my udev rules.

avrdude

Code:

bash-4.2$ avrdude -c stk500 -pt2313 -B 2 -P /dev/ttyACM0 -v

avrdude: Version 5.10, compiled on Mar  2 2011 at 22:01:12
         Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
         Copyright (c) 2007-2009 Joerg Wunsch

         System wide configuration file is "/etc/avrdude/avrdude.conf"
         User configuration file is "/home/bob/.avrduderc"
         User configuration file does not exist or is not a regular file, skipping

         Using Port                    : /dev/ttyACM0
         Using Programmer              : stk500
         Setting bit clk period        : 2.0
avrdude: ser_open(): can't open device "/dev/ttyACM0": Permission denied

lsusb:

Code:

Bus 002 Device 003: ID 16c0:2a9b VOTI

udev rule

Code:

bash-4.2$ cat /etc/udev/rules.d/80-avr.rules 
SUBSYSTEM="usb", ATTR{idVendor}=="16c0", ATTR{idProduct}=="2a9b", GROUP="bob", MODE="0666"

catkin · 06-24-2011, 04:59 AM

What is the udevadm info output for the device?

blue_bob · 06-24-2011, 05:28 PM

Is this the right output?

Code:

bash-4.2$ udevadm info --path=/devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.0/tty/ttyACM0 --query=all
P: /devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.0/tty/ttyACM0
N: ttyACM0
S: serial/by-path/pci-0000:00:1d.0-usb-0:2:1.0
S: serial/by-id/usb-Stange_Distribution_DX-ISP-if00
E: UDEV_LOG=3
E: DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.0/tty/ttyACM0
E: MAJOR=166
E: MINOR=0
E: DEVNAME=/dev/ttyACM0
E: SUBSYSTEM=tty
E: ID_PATH=pci-0000:00:1d.0-usb-0:2:1.0
E: ID_VENDOR=Stange_Distribution
E: ID_VENDOR_ENC=Stange\x20Distribution
E: ID_VENDOR_ID=16c0
E: ID_MODEL=DX-ISP
E: ID_MODEL_ENC=DX-ISP
E: ID_MODEL_ID=2a9b
E: ID_REVISION=0101
E: ID_SERIAL=Stange_Distribution_DX-ISP
E: ID_TYPE=generic
E: ID_BUS=usb
E: ID_USB_INTERFACES=:020201:0a0000:
E: ID_USB_INTERFACE_NUM=00
E: ID_USB_DRIVER=cdc_acm
E: ID_IFACE=00
E: ID_VENDOR_FROM_DATABASE=VOTI
E: ID_MM_CANDIDATE=1
E: DEVLINKS=/dev/serial/by-path/pci-0000:00:1d.0-usb-0:2:1.0 /dev/serial/by-id/usb-Stange_Distribution_DX-ISP-if00
E: TAGS=:systemd:

catkin · 06-25-2011, 12:01 AM

Try udevadm info ---attribute-walk --path=/devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.0/tty/ttyACM0

It should show attributes like the ones used in udev rules.

blue_bob · 06-25-2011, 03:47 AM

this should be the right one: So how can I see if or were my rule was applied?

Code:

looking at parent device '/devices/pci0000:00/0000:00:1d.0/usb2/2-2':
    KERNELS=="2-2"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{configuration}==""
    ATTRS{bNumInterfaces}==" 2"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bmAttributes}=="c0"
    ATTRS{bMaxPower}=="500mA"
    ATTRS{urbnum}=="14"
    ATTRS{idVendor}=="16c0"
    ATTRS{idProduct}=="2a9b"
    ATTRS{bcdDevice}=="0101"
    ATTRS{bDeviceClass}=="02"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bDeviceProtocol}=="00"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bMaxPacketSize0}=="8"
    ATTRS{speed}=="12"
    ATTRS{busnum}=="2"
    ATTRS{devnum}=="13"
    ATTRS{devpath}=="2"
    ATTRS{version}==" 2.00"
    ATTRS{maxchild}=="0"
    ATTRS{quirks}=="0x0"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{authorized}=="1"
    ATTRS{manufacturer}=="Stange Distribution"
    ATTRS{product}=="DX-ISP"

In case it was not the right one, here is the full output:

Code:

bash-4.2$ udevadm info --attribute-walk --path=/devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.0/tty/ttyACM0

Udevadm info starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.

  looking at device '/devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.0/tty/ttyACM0':
    KERNEL=="ttyACM0"
    SUBSYSTEM=="tty"
    DRIVER==""

  looking at parent device '/devices/pci0000:00/0000:00:1d.0/usb2/2-2/2-2:1.0':
    KERNELS=="2-2:1.0"
    SUBSYSTEMS=="usb"
    DRIVERS=="cdc_acm"
    ATTRS{bInterfaceNumber}=="00"
    ATTRS{bAlternateSetting}==" 0"
    ATTRS{bNumEndpoints}=="01"
    ATTRS{bInterfaceClass}=="02"
    ATTRS{bInterfaceSubClass}=="02"
    ATTRS{bInterfaceProtocol}=="01"
    ATTRS{supports_autosuspend}=="1"
    ATTRS{bmCapabilities}=="6"

  looking at parent device '/devices/pci0000:00/0000:00:1d.0/usb2/2-2':
    KERNELS=="2-2"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{configuration}==""
    ATTRS{bNumInterfaces}==" 2"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bmAttributes}=="c0"
    ATTRS{bMaxPower}=="500mA"
    ATTRS{urbnum}=="14"
    ATTRS{idVendor}=="16c0"
    ATTRS{idProduct}=="2a9b"
    ATTRS{bcdDevice}=="0101"
    ATTRS{bDeviceClass}=="02"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bDeviceProtocol}=="00"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bMaxPacketSize0}=="8"
    ATTRS{speed}=="12"
    ATTRS{busnum}=="2"
    ATTRS{devnum}=="13"
    ATTRS{devpath}=="2"
    ATTRS{version}==" 2.00"
    ATTRS{maxchild}=="0"
    ATTRS{quirks}=="0x0"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{authorized}=="1"
    ATTRS{manufacturer}=="Stange Distribution"
    ATTRS{product}=="DX-ISP"

  looking at parent device '/devices/pci0000:00/0000:00:1d.0/usb2':
    KERNELS=="usb2"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{configuration}==""
    ATTRS{bNumInterfaces}==" 1"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bmAttributes}=="e0"
    ATTRS{bMaxPower}=="  0mA"
    ATTRS{urbnum}=="380"
    ATTRS{idVendor}=="1d6b"
    ATTRS{idProduct}=="0001"
    ATTRS{bcdDevice}=="0206"
    ATTRS{bDeviceClass}=="09"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bDeviceProtocol}=="00"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bMaxPacketSize0}=="64"
    ATTRS{speed}=="12"
    ATTRS{busnum}=="2"
    ATTRS{devnum}=="1"
    ATTRS{devpath}=="0"
    ATTRS{version}==" 1.10"
    ATTRS{maxchild}=="2"
    ATTRS{quirks}=="0x0"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{authorized}=="1"
    ATTRS{manufacturer}=="Linux 2.6.38.8-32.fc15.i686 uhci_hcd"
    ATTRS{product}=="UHCI Host Controller"
    ATTRS{serial}=="0000:00:1d.0"
    ATTRS{authorized_default}=="1"

  looking at parent device '/devices/pci0000:00/0000:00:1d.0':
    KERNELS=="0000:00:1d.0"
    SUBSYSTEMS=="pci"
    DRIVERS=="uhci_hcd"
    ATTRS{vendor}=="0x8086"
    ATTRS{device}=="0x27c8"
    ATTRS{subsystem_vendor}=="0x1043"
    ATTRS{subsystem_device}=="0x83ad"
    ATTRS{class}=="0x0c0300"
    ATTRS{irq}=="23"
    ATTRS{local_cpus}=="ffffffff,ffffffff"
    ATTRS{local_cpulist}=="0-63"
    ATTRS{dma_mask_bits}=="32"
    ATTRS{consistent_dma_mask_bits}=="32"
    ATTRS{broken_parity_status}=="0"
    ATTRS{msi_bus}==""

  looking at parent device '/devices/pci0000:00':
    KERNELS=="pci0000:00"
    SUBSYSTEMS==""
    DRIVERS==""

kbp · 05-10-2012, 07:55 PM

I realise this is an old thread but just in case someone comes across it, SUBSYSTEM would need an extra '=':

Quote:

bash-4.2$ cat /etc/udev/rules.d/80-avr.rules
SUBSYSTEM=="usb", ATTR{idVendor}=="16c0", ATTR{idProduct}=="2a9b", GROUP="bob", MODE="0666"