import argparse import os import sys sys.path.append("../../tools/usb_descriptor") from adafruit_usb_descriptor import audio, audio10, cdc, hid, midi, msc, standard, util import hid_report_descriptors parser = argparse.ArgumentParser(description='Generate USB descriptors.') parser.add_argument('--manufacturer', type=str, help='manufacturer of the device') parser.add_argument('--product', type=str, help='product name of the device') parser.add_argument('--vid', type=lambda x: int(x, 16), help='vendor id') parser.add_argument('--pid', type=lambda x: int(x, 16), help='product id') parser.add_argument('--serial_number_length', type=int, default=32, help='length needed for the serial number in digits') parser.add_argument('--output_c_file', type=argparse.FileType('w'), required=True) parser.add_argument('--output_h_file', type=argparse.FileType('w'), required=True) args = parser.parse_args() class StringIndex: """Assign a monotonically increasing index to each unique string. Start with 0.""" string_to_index = {} index_to_variable = {} strings = [] @classmethod def index(cls, string, *, variable_name = None): if string in cls.string_to_index: idx = cls.string_to_index[string] if not cls.index_to_variable[idx]: cls.index_to_variable[idx] = variable_name return idx else: idx = len(cls.strings) cls.string_to_index[string] = idx cls.strings.append(string) cls.index_to_variable[idx] = variable_name return idx @classmethod def strings_in_order(cls): return cls.strings # langid must be the 0th string descriptor LANGID_INDEX = StringIndex.index("\u0409", variable_name="language_id") assert LANGID_INDEX == 0 SERIAL_NUMBER_INDEX = StringIndex.index("S" * args.serial_number_length, variable_name="usb_serial_number") device = standard.DeviceDescriptor( description="top", idVendor=args.vid, idProduct=args.pid, iManufacturer=StringIndex.index(args.manufacturer), iProduct=StringIndex.index(args.product), iSerialNumber=SERIAL_NUMBER_INDEX) # Interface numbers are interface-set local and endpoints are interface local # until util.join_interfaces renumbers them. cdc_union = cdc.Union( description="CDC comm", bMasterInterface=0x00, # Adjust this after interfaces are renumbered. bSlaveInterface_list=[0x01]) # Adjust this after interfaces are renumbered. cdc_call_management = cdc.CallManagement( description="CDC comm", bmCapabilities=0x01, bDataInterface=0x01) # Adjust this after interfaces are renumbered. cdc_comm_interface = standard.InterfaceDescriptor( description="CDC comm", bInterfaceClass=cdc.CDC_CLASS_COMM, # Communications Device Class bInterfaceSubClass=cdc.CDC_SUBCLASS_ACM, # Abstract control model bInterfaceProtocol=cdc.CDC_PROTOCOL_NONE, iInterface=StringIndex.index("CircuitPython CDC control"), subdescriptors=[ cdc.Header( description="CDC comm", bcdCDC=0x0110), cdc_call_management, cdc.AbstractControlManagement( description="CDC comm", bmCapabilities=0x02), cdc_union, standard.EndpointDescriptor( description="CDC comm in", bEndpointAddress=0x0 | standard.EndpointDescriptor.DIRECTION_IN, bmAttributes=standard.EndpointDescriptor.TYPE_INTERRUPT, wMaxPacketSize=0x0040, bInterval=0x10) ]) cdc_data_interface = standard.InterfaceDescriptor( description="CDC data", bInterfaceClass=cdc.CDC_CLASS_DATA, iInterface=StringIndex.index("CircuitPython CDC data"), subdescriptors=[ standard.EndpointDescriptor( description="CDC data out", bEndpointAddress=0x0 | standard.EndpointDescriptor.DIRECTION_OUT, bmAttributes=standard.EndpointDescriptor.TYPE_BULK), standard.EndpointDescriptor( description="CDC data in", bEndpointAddress=0x0 | standard.EndpointDescriptor.DIRECTION_IN, bmAttributes=standard.EndpointDescriptor.TYPE_BULK), ]) cdc_interfaces = [cdc_comm_interface, cdc_data_interface] msc_interfaces = [ standard.InterfaceDescriptor( description="MSC", bInterfaceClass=msc.MSC_CLASS, bInterfaceSubClass=msc.MSC_SUBCLASS_TRANSPARENT, bInterfaceProtocol=msc.MSC_PROTOCOL_BULK, iInterface=StringIndex.index("CircuitPython Mass Storage"), subdescriptors=[ standard.EndpointDescriptor( description="MSC in", bEndpointAddress=0x0 | standard.EndpointDescriptor.DIRECTION_IN, bmAttributes=standard.EndpointDescriptor.TYPE_BULK, bInterval=0), standard.EndpointDescriptor( description="MSC out", bEndpointAddress=0x1 | standard.EndpointDescriptor.DIRECTION_OUT, bmAttributes=standard.EndpointDescriptor.TYPE_BULK, bInterval=0) ] ) ] # Include only these HID devices. # DIGITIZER works on Linux but conflicts with MOUSE, so leave it out for now. hid_devices = ("KEYBOARD", "MOUSE", "CONSUMER", "GAMEPAD") combined_hid_report_descriptor = hid.ReportDescriptor( description="MULTIDEVICE", report_descriptor=b''.join( hid_report_descriptors.REPORT_DESCRIPTORS[name].report_descriptor for name in hid_devices )) hid_report_ids_dict = { name: hid_report_descriptors.REPORT_IDS[name] for name in hid_devices } hid_report_lengths_dict = { name: hid_report_descriptors.REPORT_LENGTHS[name] for name in hid_devices } hid_max_report_length = max(hid_report_lengths_dict.values()) # ASF4 expects keyboard and generic devices to have both in and out endpoints, # and will fail (possibly silently) if both are not supplied. hid_endpoint_in_descriptor = standard.EndpointDescriptor( description="HID in", bEndpointAddress=0x0 | standard.EndpointDescriptor.DIRECTION_IN, bmAttributes=standard.EndpointDescriptor.TYPE_INTERRUPT, bInterval=10) hid_interfaces = [ standard.InterfaceDescriptor( description="HID Multiple Devices", bInterfaceClass=hid.HID_CLASS, bInterfaceSubClass=hid.HID_SUBCLASS_NOBOOT, bInterfaceProtocol=hid.HID_PROTOCOL_NONE, iInterface=StringIndex.index("CircuitPython HID"), subdescriptors=[ hid.HIDDescriptor( description="HID", wDescriptorLength=len(bytes(combined_hid_report_descriptor))), hid_endpoint_in_descriptor, ] ), ] # Audio! # In and out here are relative to CircuitPython # USB OUT -> midi_in_jack_emb -> midi_out_jack_ext -> CircuitPython midi_in_jack_emb = midi.InJackDescriptor( description="MIDI PC -> CircuitPython", bJackType=midi.JACK_TYPE_EMBEDDED, iJack=StringIndex.index("CircuitPython usb_midi.ports[0]")) midi_out_jack_ext = midi.OutJackDescriptor( description="MIDI data out to user code.", bJackType=midi.JACK_TYPE_EXTERNAL, input_pins=[(midi_in_jack_emb, 1)], iJack=0) # USB IN <- midi_out_jack_emb <- midi_in_jack_ext <- CircuitPython midi_in_jack_ext = midi.InJackDescriptor( description="MIDI data in from user code.", bJackType=midi.JACK_TYPE_EXTERNAL, iJack=0) midi_out_jack_emb = midi.OutJackDescriptor( description="MIDI PC <- CircuitPython", bJackType=midi.JACK_TYPE_EMBEDDED, input_pins=[(midi_in_jack_ext, 1)], iJack=StringIndex.index("CircuitPython usb_midi.ports[1]")) audio_midi_interface = standard.InterfaceDescriptor( description="Midi goodness", bInterfaceClass=audio.AUDIO_CLASS_DEVICE, bInterfaceSubClass=audio.AUDIO_SUBCLASS_MIDI_STREAMING, bInterfaceProtocol=audio.AUDIO_PROTOCOL_V1, iInterface=StringIndex.index("CircuitPython MIDI"), subdescriptors=[ midi.Header( jacks_and_elements=[ midi_in_jack_emb, midi_in_jack_ext, midi_out_jack_emb, midi_out_jack_ext ], ), standard.EndpointDescriptor( description="MIDI data out to CircuitPython", bEndpointAddress=0x0 | standard.EndpointDescriptor.DIRECTION_OUT, bmAttributes=standard.EndpointDescriptor.TYPE_BULK), midi.DataEndpointDescriptor(baAssocJack=[midi_in_jack_emb]), standard.EndpointDescriptor( description="MIDI data in from CircuitPython", bEndpointAddress=0x0 | standard.EndpointDescriptor.DIRECTION_IN, bmAttributes=standard.EndpointDescriptor.TYPE_BULK, bInterval = 0x0), midi.DataEndpointDescriptor(baAssocJack=[midi_out_jack_emb]), ]) cs_ac_interface = audio10.AudioControlInterface( description="Empty audio control", audio_streaming_interfaces = [], midi_streaming_interfaces = [ audio_midi_interface ] ) audio_control_interface = standard.InterfaceDescriptor( description="All the audio", bInterfaceClass=audio.AUDIO_CLASS_DEVICE, bInterfaceSubClass=audio.AUDIO_SUBCLASS_CONTROL, bInterfaceProtocol=audio.AUDIO_PROTOCOL_V1, iInterface=StringIndex.index("CircuitPython Audio"), subdescriptors=[ cs_ac_interface, ]) # Audio streaming interfaces must occur before MIDI ones. audio_interfaces = [audio_control_interface] + cs_ac_interface.audio_streaming_interfaces + cs_ac_interface.midi_streaming_interfaces # This will renumber the endpoints to make them unique across descriptors, # and renumber the interfaces in order. But we still need to fix up certain # interface cross-references. interfaces = util.join_interfaces(cdc_interfaces, msc_interfaces, hid_interfaces, audio_interfaces) # Now adjust the CDC interface cross-references. cdc_union.bMasterInterface = cdc_comm_interface.bInterfaceNumber cdc_union.bSlaveInterface_list = [cdc_data_interface.bInterfaceNumber] cdc_call_management.bDataInterface = cdc_data_interface.bInterfaceNumber cdc_iad = standard.InterfaceAssociationDescriptor( description="CDC IAD", bFirstInterface=cdc_comm_interface.bInterfaceNumber, bInterfaceCount=len(cdc_interfaces), bFunctionClass=cdc.CDC_CLASS_COMM, # Communications Device Class bFunctionSubClass=cdc.CDC_SUBCLASS_ACM, # Abstract control model bFunctionProtocol=cdc.CDC_PROTOCOL_NONE) descriptor_list = [] descriptor_list.append(cdc_iad) descriptor_list.extend(cdc_interfaces) descriptor_list.extend(msc_interfaces) # Only add the control interface because other audio interfaces are managed by it to ensure the # correct ordering. descriptor_list.append(audio_control_interface) # Put the CDC IAD just before the CDC interfaces. # There appears to be a bug in the Windows composite USB driver that requests the # HID report descriptor with the wrong interface number if the HID interface is not given # first. However, it still fetches the descriptor anyway. We could reorder the interfaces but # the Windows 7 Adafruit_usbser.inf file thinks CDC is at Interface 0, so we'll leave it # there for backwards compatibility. descriptor_list.extend(hid_interfaces) configuration = standard.ConfigurationDescriptor( description="Composite configuration", wTotalLength=(standard.ConfigurationDescriptor.bLength + sum([len(bytes(x)) for x in descriptor_list])), bNumInterfaces=len(interfaces)) descriptor_list.insert(0, configuration) string_descriptors = [standard.StringDescriptor(string) for string in StringIndex.strings_in_order()] serial_number_descriptor = string_descriptors[SERIAL_NUMBER_INDEX] c_file = args.output_c_file h_file = args.output_h_file c_file.write("""\ #include #include "{H_FILE_NAME}" """.format(H_FILE_NAME=h_file.name)) c_file.write("""\ // {DESCRIPTION} : {CLASS} """.format(DESCRIPTION=device.description, CLASS=device.__class__)) c_file.write("""\ const uint8_t usb_desc_dev[] = { """) for b in bytes(device): c_file.write("0x{:02x}, ".format(b)) c_file.write("""\ }; """) c_file.write("""\ const uint8_t usb_desc_cfg[] = { """) # Write out all the regular descriptors as one long array (that's how ASF4 does it). descriptor_length = 0 for descriptor in descriptor_list: c_file.write("""\ // {DESCRIPTION} : {CLASS} """.format(DESCRIPTION=descriptor.description, CLASS=descriptor.__class__)) b = bytes(descriptor) notes = descriptor.notes() i = 0 # This prints each subdescriptor on a separate line. n = 0 while i < len(b): length = b[i] for j in range(length): c_file.write("0x{:02x}, ".format(b[i + j])) c_file.write("// " + notes[n]) n += 1 c_file.write("\n") i += length descriptor_length += len(b) c_file.write("""\ }; """) pointers_to_strings = [] for idx, descriptor in enumerate(string_descriptors): c_file.write("""\ // {DESCRIPTION} : {CLASS} """.format(DESCRIPTION=descriptor.description, CLASS=descriptor.__class__)) b = bytes(descriptor) notes = descriptor.notes() i = 0 # This prints each subdescriptor on a separate line. variable_name = StringIndex.index_to_variable[idx] if not variable_name: variable_name = "string_descriptor{}".format(idx) const = "const " if variable_name == "usb_serial_number": const = "" c_file.write("""\ {const}uint16_t {NAME}[] = {{ """.format(const=const, NAME=variable_name)) pointers_to_strings.append("{name}".format(name=variable_name)) n = 0 while i < len(b): length = b[i] for j in range(length // 2): c_file.write("0x{:04x}, ".format(b[i + 2*j + 1] << 8 | b[i + 2*j])) n += 1 c_file.write("\n") i += length c_file.write("""\ }; """) c_file.write("""\ // array of pointer to string descriptors uint16_t const * const string_desc_arr [] = { """) c_file.write(""",\ """.join(pointers_to_strings)) c_file.write(""" }; """) c_file.write("\n"); hid_descriptor_length = len(bytes(combined_hid_report_descriptor)) # Now we values we need for the .h file. h_file.write("""\ #ifndef MICROPY_INCLUDED_AUTOGEN_USB_DESCRIPTOR_H #define MICROPY_INCLUDED_AUTOGEN_USB_DESCRIPTOR_H #include const uint8_t usb_desc_dev[{device_length}]; // Make sure the control buffer is big enough to fit the descriptor. #define CFG_TUD_ENUM_BUFFER_SIZE {max_configuration_length} const uint8_t usb_desc_cfg[{configuration_length}]; uint16_t usb_serial_number[{serial_number_length}]; uint16_t const * const string_desc_arr [{string_descriptor_length}]; const uint8_t hid_report_descriptor[{HID_REPORT_DESCRIPTOR_LENGTH}]; // Vendor name included in Inquiry response, max 8 bytes #define CFG_TUD_MSC_VENDOR "{msc_vendor}" // Product name included in Inquiry response, max 16 bytes #define CFG_TUD_MSC_PRODUCT "{msc_product}" """ .format(serial_number_length=len(bytes(serial_number_descriptor)) // 2, device_length=len(bytes(device)), configuration_length=descriptor_length, max_configuration_length=max(hid_descriptor_length, descriptor_length), string_descriptor_length=len(pointers_to_strings), HID_REPORT_DESCRIPTOR_LENGTH=len(bytes(combined_hid_report_descriptor)), msc_vendor=args.manufacturer[:8], msc_product=args.product[:16])) # #define the report ID's used in the combined HID descriptor for name, id in hid_report_ids_dict.items(): h_file.write("""\ #define USB_HID_REPORT_ID_{name} {id} """.format(name=name, id=id)) h_file.write("\n") # #define the report sizes used in the combined HID descriptor for name, length in hid_report_lengths_dict.items(): h_file.write("""\ #define USB_HID_REPORT_LENGTH_{name} {length} """.format(name=name, length=length)) h_file.write("\n") h_file.write("""\ #define USB_HID_NUM_DEVICES {num_devices} #define USB_HID_MAX_REPORT_LENGTH {max_length} """.format(num_devices=len(hid_report_lengths_dict), max_length=hid_max_report_length)) # Write out the report descriptor and info c_file.write("""\ const uint8_t hid_report_descriptor[{HID_DESCRIPTOR_LENGTH}] = {{ """.format(HID_DESCRIPTOR_LENGTH=hid_descriptor_length)) for b in bytes(combined_hid_report_descriptor): c_file.write("0x{:02x}, ".format(b)) c_file.write(""" }; """) h_file.write("""\ #endif // MICROPY_INCLUDED_AUTOGEN_USB_DESCRIPTOR_H """)