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readme and less verbose messages

This commit is contained in:
noah 2011-12-14 06:25:21 -06:00
parent 3d3750c647
commit a472f6f10c
2 changed files with 39 additions and 37 deletions
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14
README
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@ -1,16 +1,14 @@
+++ Logitech Solar k750 Userspace "Driver" for Linux +++ Logitech Solar k750 Userspace "Driver" for Linux
This python code represents an initial stab at reverse-engineering a Userspace driver for Logitech solar-powered (photovaltic) keyboard.
solar-powered (photovaltic) keyboard. Predictably, Logitech provides Predictably, Logitech provides Windoze and Crackintosh versions of its
Windoze and Crackintosh versions of its software, but no Linux drivers. software, but no Linux drivers.
Alas, I am not a hardware hacker but I spent some time reading the USB Alas, I am not a hardware hacker but I spent some time reading the USB
spec and wireshark usb packet dumps (did you know libpcap is compatible spec and wireshark usb packet dumps (did you know libpcap is compatible
with USB? I didn't!) and fuzzing the hardware with hex values using with USB? I didn't!) and fuzzing the hardware with hex values using
pyusb. To my surprise, it kinda works. pyusb. To my surprise, it kinda works.
I'm still tweaking the output but I think this is good enough for a Note: drop the udev rule in ./rules.d into your distro's custom rules
public domain rev-eng hack. Cheers, directory (presently /etc/udev/rules.d/ on Archlinux). May require
editing/rebooting; YMMV.
Noah K. Tilton
November 23, 2011

62
logitech_k750.py
View File

@ -43,18 +43,18 @@ class USB(object):
(self.vendor_id, self.product_id)) (self.vendor_id, self.product_id))
def detach(self, n): def detach(self, n):
print "detaching.... ", #print "detaching.... ",
try: try:
self.device.detach_kernel_driver(interface=n) self.device.detach_kernel_driver(interface=n)
print "Detached %s." % n #print "Detached %s." % n
except usb.core.USBError as e: except usb.core.USBError as e:
print "couldn't detach, %s" % e print "couldn't detach, %s" % e
def attach(self, n): def attach(self, n):
print "attaching....", #print "attaching....",
try: try:
self.device.attach_kernel_driver(interface=n) self.device.attach_kernel_driver(interface=n)
print "Attached %s." % n #print "Attached %s." % n
except usb.core.USBError as e: except usb.core.USBError as e:
print "couldn't attach, %s" % e print "couldn't attach, %s" % e
@ -74,35 +74,39 @@ class USB(object):
if __name__ == '__main__': if __name__ == '__main__':
while True: # find
# find kb = USB( vendor_id=0x046d, product_id=0xc52b)
kb = USB( vendor_id=0x046d, product_id=0xc52b) kb.open( device_index=0, interface_indices=(2,0,), endpoint_index=0 )
kb.open( device_index=0, interface_indices=(2,0,), endpoint_index=0 )
kb.claim(2) kb.detach(2)
kb.claim(2)
# fuzz (ymmv here -- I used wireshark, and there is a lot of # fuzz (ymmv here -- I used wireshark, and there is a lot of
# other noise traffic that I am not including because I don't # other noise traffic that I am not including because I don't
# think it's required to make this work) # 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\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\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\x09\x03\x78\x01\x00"),
#kb.device.ctrl_transfer(0x21, 0x09, 0x0210, 2,"\x10\x02\x02\x02\x00\x00\x00"), #kb.device.ctrl_transfer(0x21, 0x09, 0x0210, 2,"\x10\x02\x02\x02\x00\x00\x00"),
# profit # profit
data = list( kb.device.read( data = list( kb.device.read(
kb.endpoint.bEndpointAddress, kb.endpoint.bEndpointAddress,
kb.endpoint.wMaxPacketSize, kb.endpoint.wMaxPacketSize,
kb.interface.bInterfaceNumber, kb.interface.bInterfaceNumber,
6000)) 6000))
print "Charge: %s Lux: %s (%s | %s)" % \
(data[4],
int(round(((255*data[5])+data[6])/538.0, 2)*100),
data[5],
data[6])
kb.release(2) charge = data[4]
time.sleep(1) lux = int(round(((255*data[5])+data[6])/538.0, 2)*100)
print "%s,%s" % (charge, lux)
#"Charge: %s Lux: %s (%s | %s)" % \
#(data[4],
#data[5],
#data[6])
kb.release(2)
kb.attach(2)
time.sleep(1)
# Python™ ftw! # Python™ ftw!