Couleurs de la G9x

Je suis l'heureux propriétaire d'une souris G9x. Ce petit jouet est équipé de boutons programmables et de lumières colorées. Le petit bout de code suivant permet de changer ces couleurs.

#!/usr/bin/env python

import usb
G9_VENDOR_ID = 0x046d
G9_PRODUCT_IDS = [0xc048, 0xc066]


def get_g9_handle():
    for bus in usb.busses():
        for device in bus.devices:
            if device.idVendor == G9_VENDOR_ID and \
                   device.idProduct in G9_PRODUCT_IDS:
                return device.open()
    return None


def g9_change_color(handle=None, red=None, green=None, blue=None):
    """ Change the color of an G9 leds
    g9: handle
    red: int between 0 and 255
    green: int between 0 and 255
    blue: int between 0 and 255
    """
    handle = handle or get_g9_handle()
    assert handle
    COMMAND = "\x10\x00\x80\x57"
    data = "%s%c%c%c" % (COMMAND, red, green, blue)
    REQUEST_TYPE = 0x34
    REQUEST = 0x09
    VALUE = 0x210
    INDEX = 0x01
    handle.controlMsg(REQUEST_TYPE, REQUEST, data,
                      VALUE, INDEX)


if __name__ == '__main__':
    from sys import argv
    if len(argv) == 2:
        g9_change_color(red=int(argv[1][:2], 16),
                        green=int(argv[1][2:4], 16),
                        blue=int(argv[1][4:6], 16))
    else:
        print 'Usage: g9led.py RRGGBB'

Inspiré de http://als.regnet.cz/logitech-g9-linux-led-color.html