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Updated to be compatible with libusb1

This commit is contained in:
Manuel F Martinez 2012-07-28 16:02:57 -07:00
parent a019722177
commit e9effc23da
3 changed files with 31 additions and 18 deletions
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11
INSTALL
View File

@ -3,6 +3,17 @@ python-escpos
Ensure it is present under ${lib_arch}/${python_ver}/site-packages/escpos Ensure it is present under ${lib_arch}/${python_ver}/site-packages/escpos
On Linux, ensure you belongs to the proper group so you can have access to the printer.
This can be done, by adding yourself to 'dialout' group, this might require to re-login
so the changes make effect.
Then, add the following rule to /etc/udev/rules.d/99-escpos.rules
SUBSYSTEM=="usb", ATTRS{idVendor}=="04b8", ATTRS{idProduct}=="0202", MODE="0664", GROUP="dialout"
and restar udev rules.
# sudo service udev restart
Enjoy !!! Enjoy !!!
And please, don't forget to ALWAYS add Epson.cut() at the end of your printing :)
Manuel F Martinez <manpaz@bashlinux.com> Manuel F Martinez <manpaz@bashlinux.com>

2
README
View File

@ -66,6 +66,8 @@ with your instance.
4. Define your instance 4. Define your instance
The following example shows how to initialize the Epson TM-TI88IV The following example shows how to initialize the Epson TM-TI88IV
*** NOTE: Always finish the sequence with Epson.cut() otherwise
you will endup with weird chars being printed.
from escpos import * from escpos import *

34
escpos.py
View File

@ -6,7 +6,8 @@
@license: GPL @license: GPL
''' '''
import usb import usb.core
import usb.util
import Image import Image
import time import time
@ -21,13 +22,8 @@ class DeviceDescriptor:
self.interface = interface self.interface = interface
def get_device(self) : def get_device(self) :
buses = usb.busses() device = usb.core.find(idVendor=self.idVendor, idProduct=self.idProduct)
for bus in buses :
for device in bus.devices :
if device.idVendor == self.idVendor and device.idProduct == self.idProduct :
return device return device
return None
class Escpos: class Escpos:
""" ESC/POS Printer object """ """ ESC/POS Printer object """
@ -43,21 +39,25 @@ class Escpos:
device_descriptor = DeviceDescriptor(self.idVendor, self.idProduct, self.interface) device_descriptor = DeviceDescriptor(self.idVendor, self.idProduct, self.interface)
self.device = device_descriptor.get_device() self.device = device_descriptor.get_device()
if not self.device: if self.device is None:
print "Cable isn't plugged in" print "Cable isn't plugged in"
try:
self.handle = self.device.open()
self.handle.detachKernelDriver(self.interface) # Claim the interface
self.handle.setConfiguration(self.device.configurations[0])
self.handle.claimInterface(device_descriptor.interface)
#self.handle.AltInterface(device_descriptor.interface)
except usb.USBError, err: if self.device.is_kernel_driver_active(0):
print err try:
self.device.detach_kernel_driver(0)
except usb.core.USBError as e:
print "Could not detatch kernel driver: %s" % str(e)
try:
self.device.set_configuration()
self.device.reset()
except usb.core.USBError as e:
print "Could not set configuration: %s" % str(e)
def _raw(self, msg): def _raw(self, msg):
""" Print any of the commands above, or clear text """ """ Print any of the commands above, or clear text """
self.handle.bulkWrite(self.out_ep, msg, 1000) self.device.write(self.out_ep, msg, self.interface)
def _check_image_size(self, size): def _check_image_size(self, size):