initial commit

logitech_k750.py

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+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+import sys
+import time
+import usb.core #, usb.util
+
+"""
+    Logitech Wireless Solar Keyboard K750 lux and power readings on Linux
+    Requires pyusb >= 1.0.0-a1
+
+    Copyright (©) <2011> <Noah K. Tilton noahktilton@gmail.com>
+
+    Permission is hereby granted, free of charge, to any person
+    obtaining a copy of this software and associated documentation files
+    (the "Software"), to deal in the Software without restriction,
+    including without limitation the rights to use, copy, modify, merge,
+    publish, distribute, sublicense, and/or sell copies of the Software,
+    and to permit persons to whom the Software is furnished to do so,
+    subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be
+    included in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+    OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+    HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+    WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+    OTHER DEALINGS IN THE SOFTWARE.
+"""
+
+class USB(object):
+
+    def __init__(self, vendor_id, product_id):
+        self.vendor_id = vendor_id
+        self.product_id = product_id
+        self.device = usb.core.find(idVendor=self.vendor_id,
+                idProduct=self.product_id)
+        if self.device is None: sys.exit('No device found: %s, %s' % \
+                (self.vendor_id, self.product_id))
+
+    def detach(self, n):
+        print "detaching.... ",
+        try:
+            self.device.detach_kernel_driver(interface=n)
+            print "Detached %s." % n
+        except usb.core.USBError as e:
+            print "couldn't detach, %s" % e
+
+    def attach(self, n):
+        print "attaching....",
+        try:
+            self.device.attach_kernel_driver(interface=n)
+            print "Attached %s." % n
+        except usb.core.USBError as e:
+            print "couldn't attach, %s" % e
+
+    def open(self, device_index=0, interface_indices=(0,0,), endpoint_index=0):
+        self.configuration      = self.device[device_index]
+        if self.configuration   is None: sys.exit("Bad configuration.")
+        self.interface          = self.configuration[interface_indices]
+        if self.interface       is None: sys.exit("Bad interface.")
+        self.endpoint           = self.interface[endpoint_index]
+        if self.endpoint        is None: sys.exit("Bad endpoint.")
+
+if __name__ == '__main__':
+
+    while True:
+        # find
+        kb = USB( vendor_id=0x046d, product_id=0xc52b)
+        kb.open( device_index=0, interface_indices=(2,0,), endpoint_index=0 )
+
+        # fuzz (ymmv here -- I used wireshark, and there is a lot of
+        # other noise traffic that I am not including because I don't
+        # think it's required to make this work)
+        #kb.device.ctrl_transfer(0x21, 0x09, 0x0210, 2,"\x10\xff\x81\x00\x00\x00\x00"),
+        #kb.device.ctrl_transfer(0x21, 0x09, 0x0210, 2,"\x10\xff\x83\xb5\x31\x00\x00"),
+        kb.device.ctrl_transfer(0x21, 0x09, 0x0210, 2, "\x10\x02\x09\x03\x78\x01\x00"),
+        #kb.device.ctrl_transfer(0x21, 0x09, 0x0210, 2,"\x10\x02\x02\x02\x00\x00\x00"),
+
+        # profit
+        data = list( kb.device.read(
+                    kb.endpoint.bEndpointAddress,
+                    kb.endpoint.wMaxPacketSize,
+                    kb.interface.bInterfaceNumber,
+                    6000))
+
+        print "Charge: %s Lux: %s (%s | %s)" % \
+                (data[4], ((255*data[5])+data[6]), data[5], data[6])
+
+        time.sleep(1)
+
+# Python™ ftw!