Dear List,
first of all, i just subscribed here, so a big Hello to all of you ;)
here comes my question:
i have a software written in python that needs to know the list of available serial devices on
the system, including on-board serial devices and USB serial adapters.
in the past i used hal for this and got nice results like this (lshal output):
udi =
'/org/freedesktop/Hal/devices/usb_device_403_6001_WT1693937_if0_serial_usb_0'
info.capabilities = {'serial'} (string list)
info.category = 'serial' (string)
info.parent =
'/org/freedesktop/Hal/devices/usb_device_403_6001_WT1693937_if0' (string)
info.product = 'FT232 USB-Serial (UART) IC' (string)
info.subsystem = 'tty' (string)
info.udi = '/org/freedesktop/Hal/devices/usb_device_403_6001_WT1693937_if0_serial_usb_0'
(string)
linux.device_file = '/dev/ttyUSB0' (string)
linux.hotplug_type = 2 (0x2) (int)
linux.subsystem = 'tty' (string)
linux.sysfs_path =
'/sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0/ttyUSB0/tty/ttyUSB0' (string)
serial.device = '/dev/ttyUSB0' (string)
serial.originating_device = '/org/freedesktop/Hal/devices/usb_device_403_6001_WT1693937_if0'
(string)
serial.port = 0 (0x0) (int)
serial.type = 'usb' (string)
for usb devices and:
udi = '/org/freedesktop/Hal/devices/pnp_PNP0501_serial_platform_0'
info.capabilities = {'serial'} (string list)
info.category = 'serial' (string)
info.parent = '/org/freedesktop/Hal/devices/pnp_PNP0501' (string)
info.product = '16550A-compatible COM port' (string)
info.subsystem = 'tty' (string)
info.udi = '/org/freedesktop/Hal/devices/pnp_PNP0501_serial_platform_0'
(string)
linux.device_file = '/dev/ttyS0' (string)
linux.hotplug_type = 2 (0x2) (int)
linux.subsystem = 'tty' (string)
linux.sysfs_path = '/sys/devices/pnp0/00:09/tty/ttyS0' (string)
serial.device = '/dev/ttyS0' (string)
serial.originating_device = '/org/freedesktop/Hal/devices/pnp_PNP0501'
(string)
serial.port = 0 (0x0) (int)
serial.type = 'platform' (string)
for onboard devices ...
i built a wrapper around this and the programmer could specify which software can communicate
with which device based on matching criteria.
furthermore i was able to get the serial number of the usb adapter (1693937 in this case) which
is also printed on the device - a useful information to the customer which needs this
information to map the connected hardware to the software ...
now, as hal is gone - at least in gentoo where i run my software - how can i do this with DBus
/ DevKit / is this at least the right place to ask ?!?!
i did some experiments with python-dbus but all i was able to get was a huge list of serial
devices (existing and non existing) - now, i could filter out those that are not existing by
trying to open each one of them - but that sounds odd to me ... however i also did some
searches on this mailinglist but havent found much about this topic ... despite other people
having the same problems ;)
furthermore, how can i retrieve the serial number of the usb adapter - which was part of the
"udi" ?!?!
any help would be very much appreciated as i would like to upgrade the system to more recent
versions ... it is about two years old now ...
i would also like to hack some code on this - to get it done !!!
regards,
marcus.
--
Marcus Priesch
open source consultant - solution provider
www.priesch.co.at / off...@priesch.co.at
A-2122 Riedenthal, In Prandnern 31 / +43 650 62 72 870
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