Utiliser une souris compatible HID comme un périphérique sous Ubuntu
Objectif: j'ai un tableau blanc qui émule en tant que souris. Ainsi, lorsque vous cliquez et faites glisser sur le tableau blanc, le curseur doit être déplacé. Je souhaite faire fonctionner un tableau blanc sous Ubuntu. Il fonctionne sous windows. Informations sur le périphérique: la sortie de cat /proc/bus/input qui contient les informations sur le périphérique
I: Bus=0003 Vendor=4623 Product=011a Version=0111
N: Name="Hite Board-XXXXXXXX"
P: Phys=usb-0000:00:14.0-1/input0
S: Sysfs=/devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.0/
U: Uniq=
H: Handlers=mouse2 event13
B: PROP=2
B: EV=b
B: KEY=400 0 0 0 0 0
B: ABS=260800000000003
abhishek@vaio:~$ lsusb -d 4623:011a -v
Bus 001 Device 012: ID 4623:011a
Couldn't open device, some information will be missing
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x4623
idProduct 0x011a
bcdDevice 0.01
iManufacturer 1
iProduct 2
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 73
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 150mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 0 No Subclass
bInterfaceProtocol 0 None
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.11
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 429
Report Descriptors:
** UNAVAILABLE **
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 8
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 0 No Subclass
bInterfaceProtocol 0 None
iInterface 6
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.10
bCountryCode 33 US
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 91
Report Descriptors:
** UNAVAILABLE **
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Puisque bInterfaceProtocol est None, Linux ne le reconnaît pas comme périphérique de saisie de la souris.
Quelle est l'approche idéale pour inverser l'ingénierie à partir de Windows pour le faire fonctionner sous Linux.
Périphérique dans Windows Device Manager:
Modifier 1:
abhishek@vaio:~/dev_work/whiteboard/pyusbwhiteboard$ usb-devices | grep -A5 'Vendor=4623 ProdID=011a' | grep Driver
I: If#= 0 Alt= 0 #EPs= 2 Cls=03(HID ) Sub=00 Prot=00 Driver=usbfs
I: If#= 1 Alt= 0 #EPs= 2 Cls=03(HID ) Sub=00 Prot=00 Driver=usbhid
sortie dmesg: http://codepad.org/fFtwryw6
J'ai écrit un script qui a été capable de faire le travail. Mais je devais comprendre ce que les entrées de l'appareil signifiaient.
import sys,pdb
import usb.core
import usb.util
from pymouse import PyMouse
# whiteboard coordinates axis computed by checking the output against strokes
white_board_x_min=(1<<8)+1
white_board_x_max=(127<<8)+255
white_board_y_min=(1<<8)+1
white_board_y_max=(127<<8)+255
white_board_x_diff=white_board_x_max-white_board_x_min
white_board_y_diff=white_board_y_max-white_board_y_min
# mouse handler
m = PyMouse()
x_screen, y_screen = m.screen_size()
# decimal vendor and product values
dev = usb.core.find(idVendor=17955, idProduct=282)
# first endpoint
interface = 0
endpoint = dev[0][(0,0)][0]
# if the OS kernel already claimed the device, which is most likely true
# thanks to http://stackoverflow.com/questions/8218683/pyusb-cannot-set-configuration
if dev.is_kernel_driver_active(interface) is True:
# tell the kernel to detach
dev.detach_kernel_driver(interface)
# claim the device
usb.util.claim_interface(dev, interface)
mouse_down_event=False
try:
while True :
try:
data = dev.read(endpoint.bEndpointAddress,endpoint.wMaxPacketSize)
# click value
click=data[1] # if it is 7 mouse down else if it is 4 it is mouse up
# get the coordinates
xcor,ycor,dec_x_binary,dec_y_binary=data[4],data[6],data[3],data[5]
# convert to decimal
xcor_dec=(xcor<<8)+dec_x_binary
ycor_dec=(ycor<<8)+dec_y_binary
# convert to relative screen coordinates
screen_xcor=int(round((float(xcor_dec-white_board_x_min)/float(white_board_x_diff)) * x_screen))
screen_ycor=int(round((float(ycor_dec-white_board_y_min)/float(white_board_y_diff)) * y_screen))
#print "%d, %d"%(xcor_dec,ycor_dec)
#print "%d, %d"%(screen_xcor,screen_ycor)
# check if it is valid event
if xcor_dec!=0 and ycor_dec!=0:
# move mouse
if click==7:
# mean mouse down event
if mouse_down_event:
# drag event
# draw a line from previous coordinates
m.drag(screen_xcor, screen_ycor)
else:
# first button press event
m.click(screen_xcor, screen_ycor, 1)
mouse_down_event=True
else:
# mouse up event
# set event type in mouse_down_event
# first button press and drag
mouse_down_event=False
except usb.core.USBError as e:
data = None
if e.args == ('Operation timed out',):
continue
finally:
# release the device
usb.util.release_interface(dev, interface)
# reattach the device to the OS kernel
dev.attach_kernel_driver(interface)