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)
import hid_gadget
import usb_constants
report_desc = hid_descriptors.ReportDescriptor(
hid_descriptors.UsagePage(0xFF00), # Vendor Defined
hid_descriptors.Usage(0x00),
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.Input(hid_descriptors.Data, hid_descriptors.Variable,
hid_descriptors.Absolute,
hid_descriptors.BufferedBytes),
hid_descriptors.Output(hid_descriptors.Data, hid_descriptors.Variable,
hid_descriptors.Absolute,
hid_descriptors.BufferedBytes),
hid_descriptors.Feature(hid_descriptors.Data, hid_descriptors.Variable,
hid_descriptors.Absolute,
hid_descriptors.BufferedBytes)))
combo_report_desc = hid_descriptors.ReportDescriptor(
hid_descriptors.ReportID(1), report_desc, hid_descriptors.ReportID(2),
report_desc)
class HidGadgetTest(unittest.TestCase):
def test_bad_intervals(self):
with self.assertRaisesRegexp(ValueError, 'Full speed'):
hid_gadget.HidGadget(report_desc,
features={},
class KeyboardFeature(hid_gadget.HidFeature):
"""HID feature implementation for a keyboard.
REPORT_DESC provides an example HID report descriptor for a device including
this functionality.
"""
REPORT_DESC = hid_descriptors.ReportDescriptor(
hid_descriptors.UsagePage(0x01), # Generic Desktop
hid_descriptors.Usage(0x06), # Keyboard
hid_descriptors.Collection(
hid_constants.CollectionType.APPLICATION,
hid_descriptors.UsagePage(0x07), # Key Codes
hid_descriptors.UsageMinimum(224),
hid_descriptors.UsageMaximum(231),
hid_descriptors.LogicalMinimum(0, force_length=1),
hid_descriptors.LogicalMaximum(1),
hid_descriptors.ReportSize(1),
hid_descriptors.ReportCount(8),
hid_descriptors.Input(hid_descriptors.Data,
hid_descriptors.Variable,
hid_descriptors.Absolute),
hid_descriptors.ReportCount(1),
hid_descriptors.ReportSize(8),
hid_descriptors.Input(hid_descriptors.Constant),
hid_descriptors.ReportCount(5),
hid_descriptors.ReportSize(1),
hid_descriptors.UsagePage(0x08), # LEDs
hid_descriptors.UsageMinimum(1),
hid_descriptors.UsageMaximum(5),
hid_descriptors.Output(hid_descriptors.Data,
hid_descriptors.Variable,
hid_descriptors.Absolute),
hid_descriptors.ReportCount(1),
hid_descriptors.ReportSize(3),
hid_descriptors.Output(hid_descriptors.Constant),
hid_descriptors.ReportCount(6),
hid_descriptors.ReportSize(8),
hid_descriptors.LogicalMinimum(0, force_length=1),
hid_descriptors.LogicalMaximum(101),
hid_descriptors.UsagePage(0x07), # Key Codes
hid_descriptors.UsageMinimum(0, force_length=1),
hid_descriptors.UsageMaximum(101),
hid_descriptors.Input(hid_descriptors.Data,
hid_descriptors.Array)))
def __init__(self):
super(KeyboardFeature, self).__init__()
self._modifiers = 0
self._keys = [0, 0, 0, 0, 0, 0]
self._leds = 0
def ModifierDown(self, modifier):
self._modifiers |= modifier
if self.IsConnected():
self.SendReport(self.GetInputReport())
def ModifierUp(self, modifier):
self._modifiers &= ~modifier
if self.IsConnected():
self.SendReport(self.GetInputReport())
def KeyDown(self, keycode):
free = self._keys.index(0)
self._keys[free] = keycode
if self.IsConnected():
self.SendReport(self.GetInputReport())
def KeyUp(self, keycode):
free = self._keys.index(keycode)
self._keys[free] = 0
if self.IsConnected():
self.SendReport(self.GetInputReport())
def GetInputReport(self):
"""Construct an input report.
See Device Class Definition for Human Interface Devices (HID) Version 1.11
Appendix B.1.
Returns:
A packed input report.
"""
return struct.pack('BBBBBBBB', self._modifiers, 0, *self._keys)
def GetOutputReport(self):
"""Construct an output report.
See Device Class Definition for Human Interface Devices (HID) Version 1.11
Appendix B.1.
Returns:
A packed input report.
"""
return struct.pack('B', self._leds)
def SetOutputReport(self, data):
"""Handle an output report.
See Device Class Definition for Human Interface Devices (HID) Version 1.11
Appendix B.1.
Args:
data: Report data.
Returns:
True on success, None to stall the pipe.
"""
if len(data) >= 1:
self._leds, = struct.unpack('B', data)
return True