o add bsnes

pyusb/samples/usbprint.py

@@ -0,0 +1,125 @@
+#!/usr/bin/env python
+
+"""
+Provides an interface to USB Printer Class devices.
+"""
+
+import usb
+import types
+
+PRINTER_CLASS			= 0x07
+PRINTER_SUBCLASS		= 0x01
+UNIDIRECTIONAL_PROTOCOL	= 0x01
+BIDIRECTIONAL_PROTOCOL	= 0x02
+IEEE1284_4_PROTOCOL		= 0x03
+VENDOR_PROTOCOL			= 0xff
+
+class Printer:
+	def __init__(self, device, configuration, interface):
+		"""
+		__init__(device, configuration, interface) -> None
+
+		Initialize the device.
+			device: printer usb.Device object.
+			configuration: printer usb.Configuration object of the Device or configuration number.
+			interface: printer usb.Interface object representing the
+			           interface and altenate setting.
+			
+		"""
+		if PRINTER_CLASS != interface.interfaceClass:
+			raise TypeError, "Wrong interface class"
+
+		self.__devhandle = device.open()
+		self.__devhandle.setConfiguration(configuration)
+		self.__devhandle.claimInterface(interface)
+		self.__devhandle.setAltInterface(interface)
+
+		self.__intf = interface.interfaceNumber
+		self.__alt	= interface.alternateSetting
+
+		self.__conf = (type(configuration) == types.IntType \
+						or type(configuration) == types.LongType) and \
+						configuration or \
+						configuration.value
+
+		# initialize members
+		# TODO: automatic endpoints detection
+		self.__bulkout	= 1
+		self.__bulkin	= 0x82
+	
+	def __del__(self):
+		try:
+			self.__devhandle.releaseInterface(self.__intf)
+			del self.__devhandle
+		except:
+			pass
+
+	def getDeviceID(self, maxlen, timeout = 100):
+		"""
+		getDeviceID(maxlen, timeout = 100) -> device_id
+
+		Get the device capabilities information.
+			maxlen: maxlength of the buffer.
+			timeout: operation timeout.
+		"""
+		return self.__devhandle.controlMsg(requestType = 0xa1,
+										   request = 0,
+										   value = self.__conf - 1,
+										   index = self.__alt + (self.__intf << 8),
+										   buffer = maxlen,
+										   timeout = timeout)
+	
+	def getPortStatus(self, timeout = 100):
+		"""
+		getPortStatus(timeout = 100) -> status
+
+		Get the port status.
+			timeout: operation timeout.
+		"""
+		return self.__devhandle.controlMsg(requestType = 0xa1,
+										   request = 1,
+										   value = 0,
+										   index = self.__intf,
+										   buffer = 1,
+										   timeout = timeout)[0]
+
+	def softReset(self, timeout = 100):
+		"""
+		softReset(timeout = 100) -> None
+
+		Request flushes all buffers and resets the Bulk OUT
+		and Bulk IN pipes to their default states.
+			timeout: the operation timeout.
+		"""
+		self.__devhandle.controlMsg(requestType = 0x21,
+								   	request = 2,
+								   	value = 0,
+								   	index = self.__intf,
+								   	buffer = 0)
+
+	
+	def write(self, buffer, timeout = 100):
+		"""
+		write(buffer, timeout = 100) -> written
+
+		Write data to printer.
+			buffer: data buffer.
+			timeout: operation timeout.
+		"""
+		return self.__devhandle.bulkWrite(self.__bulkout,
+										  buffer,
+										  timeout)
+
+	def read(self, numbytes, timeout = 100):
+		"""
+		read(numbytes, timeout = 100) -> data
+
+		Read data from printer.
+			numbytes: number of bytes to read.
+			timeout: operation timeout.
+		"""
+		return self.__devhandle.bulkRead(self.__bulkin,
+										 numbytes,
+										 timeout)
+
+