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USBEndpoint.py
93 lines (71 loc) · 2.95 KB
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USBEndpoint.py
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# USBEndpoint.py
#
# Contains class definition for USBEndpoint.
class USBEndpoint:
direction_out = 0x00
direction_in = 0x01
transfer_type_control = 0x00
transfer_type_isochronous = 0x01
transfer_type_bulk = 0x02
transfer_type_interrupt = 0x03
sync_type_none = 0x00
sync_type_async = 0x01
sync_type_adaptive = 0x02
sync_type_synchronous = 0x03
usage_type_data = 0x00
usage_type_feedback = 0x01
usage_type_implicit_feedback = 0x02
def __init__(self, maxusb_app, number, direction, transfer_type, sync_type,
usage_type, max_packet_size, interval, handler):
self.maxusb_app = maxusb_app
self.number = number
self.direction = direction
self.transfer_type = transfer_type
self.sync_type = sync_type
self.usage_type = usage_type
self.max_packet_size = max_packet_size
self.interval = interval
self.handler = handler
self.interface = None
self.request_handlers = {
1 : self.handle_clear_feature_request
}
def handle_clear_feature_request(self, req):
if self.maxusb_app.mode != 2:
#print("received CLEAR_FEATURE request for endpoint", self.number,
# "with value", req.value)
self.interface.configuration.device.maxusb_app.send_on_endpoint(0, b'')
def set_interface(self, interface):
self.interface = interface
# see Table 9-13 of USB 2.0 spec (pdf page 297)
def get_descriptor(self):
address = (self.number & 0x0f) | (self.direction << 7)
attributes = (self.transfer_type & 0x03) \
| ((self.sync_type & 0x03) << 2) \
| ((self.usage_type & 0x03) << 4)
if self.maxusb_app.testcase[1] == "end_bLength":
bLength = self.maxusb_app.testcase[2]
else:
bLength = 7
if self.maxusb_app.testcase[1] == "end_bDescriptorType":
bDescriptorType = self.maxusb_app.testcase[2]
else:
bDescriptorType = 5
if self.maxusb_app.testcase[1] == "end_bEndpointAddress":
bEndpointAddress = self.maxusb_app.testcase[2]
else:
bEndpointAddress = address
if self.maxusb_app.testcase[1] == "end_wMaxPacketSize":
wMaxPacketSize = self.maxusb_app.testcase[2]
else:
wMaxPacketSize = self.max_packet_size
d = bytearray([
bLength, # length of descriptor in bytes
bDescriptorType, # descriptor type 5 == endpoint
bEndpointAddress,
attributes,
(wMaxPacketSize >> 8) & 0xff,
wMaxPacketSize & 0xff,
self.interval
])
return d