[usb_gadget p13] Replace LUFA with UsbTestGadget in HidConnection tests.

tools/usb_gadget/hid_echo_gadget.py

+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""A HID-class echo device.
+
+This module provides a HID feature and HID device that can be used as an
+echo test for HID drivers. The device exposes vendor-specific input, output
+and feature usages that transmit 8 bytes of data. Data written sent as an
+output report is echoed as an input report. The value of the feature report
+can be written and read with control transfers.
+"""
+
+import struct
+
+import hid_constants
+import hid_descriptors
+import hid_gadget
+import usb_constants
+
+
+class EchoFeature(hid_gadget.HidFeature):
+
+  REPORT_DESC = hid_descriptors.ReportDescriptor(
+      hid_descriptors.UsagePage(0xFF00),  # Vendor Defined
+      hid_descriptors.Usage(0),
+      hid_descriptors.Collection(
+          hid_constants.CollectionType.APPLICATION,
+          hid_descriptors.LogicalMinimum(0, force_length=1),
+          hid_descriptors.LogicalMaximum(255, force_length=2),
+          hid_descriptors.ReportSize(8),
+          hid_descriptors.ReportCount(8),
+          hid_descriptors.Usage(0),
+          hid_descriptors.Input(hid_descriptors.Data,
+                                hid_descriptors.Variable,
+                                hid_descriptors.Absolute),
+          hid_descriptors.Usage(0),
+          hid_descriptors.Output(hid_descriptors.Data,
+                                 hid_descriptors.Variable,
+                                 hid_descriptors.Absolute),
+          hid_descriptors.Usage(0),
+          hid_descriptors.Feature(hid_descriptors.Data,
+                                  hid_descriptors.Variable,
+                                  hid_descriptors.Absolute)
+      )
+  )
+
+  def __init__(self):
+    super(EchoFeature, self).__init__()
+    self._input_output_report = 0
+    self._feature_report = 0
+
+  def SetInputReport(self, data):
+    self._input_output_report, = struct.unpack('<Q', data)
+    self.SendReport(struct.pack('<Q', self._input_output_report))
+    return True
+
+  def SetOutputReport(self, data):
+    self._input_output_report, = struct.unpack('<Q', data)
+    self.SendReport(struct.pack('<Q', self._input_output_report))
+    return True
+
+  def SetFeatureReport(self, data):
+    self._feature_report, = struct.unpack('<Q', data)
+    return True
+
+  def GetInputReport(self):
+    return struct.pack('<Q', self._input_output_report)
+
+  def GetOutputReport(self):
+    return struct.pack('<Q', self._input_output_report)
+
+  def GetFeatureReport(self):
+    return struct.pack('<Q', self._feature_report)
+
+
+class EchoGadget(hid_gadget.HidGadget):
+
+  def __init__(self):
+    self._feature = EchoFeature()
+    super(EchoGadget, self).__init__(
+        report_desc=EchoFeature.REPORT_DESC,
+        features={0: self._feature},
+        packet_size=8,
+        interval_ms=1,
+        out_endpoint=True,
+        vendor_id=usb_constants.VendorID.GOOGLE,
+        product_id=usb_constants.ProductID.GOOGLE_HID_ECHO_GADGET,
+        device_version=0x0100)
+    self.AddStringDescriptor(1, 'Google Inc.')
+    self.AddStringDescriptor(2, 'HID Echo Gadget')
+
+
+def RegisterHandlers():
+  from tornado import web
+
+  class WebConfigureHandler(web.RequestHandler):
+
+    def post(self):
+      server.SwitchGadget(EchoGadget())
+
+  import server
+  server.app.add_handlers('.*$', [
+      (r'/hid_echo/configure', WebConfigureHandler),
+  ])