Long time since I worked with USB printers, but if I remember right, status commands are issued from control endpoint. You might want to give a look at the Printer Class specification [1].
[1] http://www.usb.org/developers/devclass_docs/usbprint11a021811.pdf 2012/12/19 Marco <mdmart...@gmail.com>: > Hi > > I have a parallel receipt printer (Epson Tm88III ) > http://nicholas.piasecki.name/blog/wp-content/uploads/2009/12/ESC-POS-Programming-Guide.pdf > connected to usb using an USB/parallel adapter. > > I need to read the printer status but when i try to send the comand to the > interface i get an timeout. > I trying to use the bidireccional Interface, am i rigth? > the command i have to send to printer is 0x10 0x40 > The source is > > import usb.core > import usb.util > dev = usb.core.find(idVendor=0x067b, idProduct=0x2305) > > if dev.is_kernel_driver_active(0): > dev.detach_kernel_driver(0) > dev.detach_kernel_driver(1) > > dev.set_configuration() > > # get an endpoint instance > cfg = dev.get_active_configuration() > > interface_number = cfg[(0,0)].bInterfaceNumber > > print "\ninterface_number %s"%interface_number > > alternate_settting = usb.control.get_interface(dev,interface_number) > > intf = usb.util.find_descriptor( > cfg, bInterfaceNumber = interface_number, > bAlternateSetting = 1 > ) > ep = usb.util.find_descriptor( > intf, > # match the first OUT endpoint > custom_match = \ > lambda e: \ > usb.util.endpoint_direction(e.bEndpointAddress) == \ > usb.util.ENDPOINT_OUT > ) > epin = usb.util.find_descriptor( > intf, > # match the first OUT endpoint > custom_match = \ > lambda e: \ > usb.util.endpoint_direction(e.bEndpointAddress) == \ > usb.util.ENDPOINT_IN > ) > > #print (ep.bEndpointAddress) > #print (epin.bEndpointAddress) > > > comand='\x10'+'\x04'+'\x30' > ep.write(comand) > > print "\ndata1" > > print epin.read(1) > > > > > > the lsusb -v |more is > > Bus 007 Device 002: ID 067b:2305 Prolific Technology, Inc. PL2305 Parallel > Port > Device Descriptor: > bLength 18 > bDescriptorType 1 > bcdUSB 1.00 > bDeviceClass 0 (Defined at Interface level) > bDeviceSubClass 0 > bDeviceProtocol 0 > bMaxPacketSize0 8 > idVendor 0x067b Prolific Technology, Inc. > idProduct 0x2305 PL2305 Parallel Port > bcdDevice 2.02 > iManufacturer 1 Prolific Technology Inc. > iProduct 2 IEEE-1284 Controller > iSerial 0 > bNumConfigurations 1 > Configuration Descriptor: > bLength 9 > bDescriptorType 2 > wTotalLength 78 > bNumInterfaces 1 > bConfigurationValue 1 > iConfiguration 0 > bmAttributes 0xa0 > (Bus Powered) > Remote Wakeup > MaxPower 100mA > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 0 > bAlternateSetting 0 > bNumEndpoints 1 > bInterfaceClass 7 Printer > bInterfaceSubClass 1 Printer > bInterfaceProtocol 1 Unidirectional > iInterface 0 > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x01 EP 1 OUT > bmAttributes 2 > Transfer Type Bulk > Synch Type None > Usage Type Data > wMaxPacketSize 0x0040 1x 64 bytes > bInterval 0 > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 0 > bAlternateSetting 1 > bNumEndpoints 2 > bInterfaceClass 7 Printer > bInterfaceSubClass 1 Printer > bInterfaceProtocol 2 Bidirectional > iInterface 0 > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x01 EP 1 OUT > bmAttributes 2 > Transfer Type Bulk > Synch Type None > Usage Type Data > wMaxPacketSize 0x0040 1x 64 bytes > bInterval 0 > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x82 EP 2 IN > bmAttributes 2 > Transfer Type Bulk > Synch Type None > Usage Type Data > wMaxPacketSize 0x0040 1x 64 bytes > bInterval 0 > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 0 > bAlternateSetting 2 > bNumEndpoints 3 > bInterfaceClass 255 Vendor Specific Class > bInterfaceSubClass 0 > bInterfaceProtocol 255 > iInterface 0 > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x01 EP 1 OUT > bmAttributes 2 > Transfer Type Bulk > Synch Type None > Usage Type Data > wMaxPacketSize 0x0040 1x 64 bytes > bInterval 0 > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x82 EP 2 IN > bmAttributes 2 > Transfer Type Bulk > Synch Type None > Usage Type Data > wMaxPacketSize 0x0040 1x 64 bytes > bInterval 0 > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x83 EP 3 IN > bmAttributes 3 > Transfer Type Interrupt > Synch Type None > Usage Type Data > wMaxPacketSize 0x0004 1x 4 bytes > bInterval 1 > Device Status: 0x0000 > (Bus Powered) > > > > > > > > Thanks in advance > > > ------------------------------------------------------------------------------ > LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial > Remotely access PCs and mobile devices and provide instant support > Improve your efficiency, and focus on delivering more value-add services > Discover what IT Professionals Know. Rescue delivers > http://p.sf.net/sfu/logmein_12329d2d > _______________________________________________ > pyusb-users mailing list > pyusb-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/pyusb-users -- Best Regards, Wander Lairson Costa ------------------------------------------------------------------------------ LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial Remotely access PCs and mobile devices and provide instant support Improve your efficiency, and focus on delivering more value-add services Discover what IT Professionals Know. Rescue delivers http://p.sf.net/sfu/logmein_12329d2d _______________________________________________ pyusb-users mailing list pyusb-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pyusb-users
