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[FIX] hw_escpos: auto-detect endpoint address 

Instead of hardcoding the IN & OUT endpoint
addresses for the ESC/POS printers, we now
attempt to auto-detect them.

This should increase compatibility with many
compatible thermal printers that are simply
using a different address, such as the
- STMicroelectronics POS58 Printer USB
- HU HAI SUNCSW Receipt Printer Co.,Ltd. Gprinter USB Printer

Fixes #12890
This commit is contained in:
Olivier Dony 2016-11-16 14:52:33 +01:00
parent 1de37862d6
commit 8e8b7925d2
No known key found for this signature in database
GPG Key ID: CD556E25E8A6D0D4
2 changed files with 24 additions and 3 deletions
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8
addons/hw_escpos/controllers/main.py
View File

@ -104,8 +104,12 @@ class EscposDriver(Thread):
printers = self.connected_usb_devices()
if len(printers) > 0:
self.set_status('connected','Connected to '+printers[0]['name'])
return Usb(printers[0]['vendor'], printers[0]['product'])
print_dev = Usb(printers[0]['vendor'], printers[0]['product'])
self.set_status(
'connected',
"Connected to %s (in=0x%02x,out=0x%02x)" % (printers[0]['name'], print_dev.in_ep, print_dev.out_ep)
)
return print_dev
else:
self.set_status('disconnected','Printer Not Found')
return None

19
addons/hw_escpos/escpos/printer.py
View File

@ -13,7 +13,7 @@ from time import sleep
class Usb(Escpos):
""" Define USB printer """
def __init__(self, idVendor, idProduct, interface=0, in_ep=0x82, out_ep=0x01):
def __init__(self, idVendor, idProduct, interface=0, in_ep=None, out_ep=None):
"""
@param idVendor : Vendor ID
@param idProduct : Product ID
@ -42,6 +42,23 @@ class Usb(Escpos):
self.device.detach_kernel_driver(self.interface)
self.device.set_configuration()
usb.util.claim_interface(self.device, self.interface)
cfg = self.device.get_active_configuration()
intf = cfg[(0,0)] # first interface
if self.in_ep is None:
# Attempt to detect IN/OUT endpoint addresses
try:
is_IN = lambda e: usb.util.endpoint_direction(e.bEndpointAddress) == usb.util.ENDPOINT_IN
is_OUT = lambda e: usb.util.endpoint_direction(e.bEndpointAddress) == usb.util.ENDPOINT_OUT
endpoint_in = usb.util.find_descriptor(intf, custom_match=is_IN)
endpoint_out = usb.util.find_descriptor(intf, custom_match=is_OUT)
self.in_ep = endpoint_in.bEndpointAddress
self.out_ep = endpoint_out.bEndpointAddress
except usb.core.USBError:
# default values for officially supported printers
self.in_ep = 0x82
self.out_ep = 0x01
except usb.core.USBError as e:
raise HandleDeviceError(e)