150 lines
5.5 KiB
Python
150 lines
5.5 KiB
Python
import argparse
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import os
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import sys
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# path hacking
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sys.path.append("../../tools/usb_descriptor")
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from adafruit_usb_descriptor import cdc, standard, util
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parser = argparse.ArgumentParser(description='Generate USB descriptors.')
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parser.add_argument('--manufacturer', type=str,
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help='manufacturer of the device')
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parser.add_argument('--product', type=str,
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help='product name of the device')
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parser.add_argument('--vid', type=lambda x: int(x, 16),
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help='vendor id')
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parser.add_argument('--pid', type=lambda x: int(x, 16),
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help='product id')
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parser.add_argument('--serial_number_length', type=int, default=32,
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help='length needed for the serial number in digits')
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parser.add_argument('output_file', type=argparse.FileType('w'))
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args = parser.parse_args()
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langid = standard.StringDescriptor("\u0409")
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manufacturer = standard.StringDescriptor(args.manufacturer)
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product = standard.StringDescriptor(args.product)
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serial_number = standard.StringDescriptor("serial number. you should fill in a unique serial number here."[:args.serial_number_length])
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strings = [langid, manufacturer, product, serial_number]
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# vid = 0x239A
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# pid = 0x8021
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device = standard.DeviceDescriptor(
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idVendor=args.vid,
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idProduct=args.pid,
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iManufacturer=strings.index(manufacturer),
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iProduct=strings.index(product),
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iSerialNumber=strings.index(serial_number))
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# Interface numbers are interface set local and endpoints are interface local
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# until core.join_interfaces renumbers them.
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cdc_interfaces = [
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standard.InterfaceDescriptor(
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bInterfaceClass=0x2, # Communications Device Class
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bInterfaceSubClass=0x02, # Abstract control model
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bInterfaceProtocol=0x01, # Common AT Commands
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subdescriptors=[
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# Working 2.x
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# radix: hexadecimal
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# 05 24 00 10 01 header
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# 05 24 01 03 01 call manage
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# 04 24 02 06 acm
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# 05 24 06 00 01 union
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cdc.Header(bcdCDC=0x0110),
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cdc.CallManagement(bmCapabilities=0x03, bDataInterface=0x01),
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cdc.AbstractControlManagement(bmCapabilities=0x02),
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cdc.Union(bMasterInterface=0x00,
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bSlaveInterface=[0x01]),
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standard.EndpointDescriptor(
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bEndpointAddress=0x0 | standard.EndpointDescriptor.DIRECTION_IN,
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bmAttributes=standard.EndpointDescriptor.TYPE_INTERRUPT,
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wMaxPacketSize=0x8,
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bInterval=10)
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]
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),
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standard.InterfaceDescriptor(
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bInterfaceClass=0x0a,
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subdescriptors=[
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standard.EndpointDescriptor(
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bEndpointAddress=0x0 | standard.EndpointDescriptor.DIRECTION_IN,
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bmAttributes=standard.EndpointDescriptor.TYPE_BULK),
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standard.EndpointDescriptor(
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bEndpointAddress=0x0 | standard.EndpointDescriptor.DIRECTION_OUT,
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bmAttributes=standard.EndpointDescriptor.TYPE_BULK)
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]
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)
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]
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msc_interfaces = [
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standard.InterfaceDescriptor(
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bInterfaceClass=0x08,
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bInterfaceSubClass=0x06,
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bInterfaceProtocol=0x50,
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subdescriptors=[
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standard.EndpointDescriptor(
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bEndpointAddress=0x0 | standard.EndpointDescriptor.DIRECTION_IN,
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bmAttributes=standard.EndpointDescriptor.TYPE_BULK),
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standard.EndpointDescriptor(
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bEndpointAddress=0x1 | standard.EndpointDescriptor.DIRECTION_OUT,
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bmAttributes=standard.EndpointDescriptor.TYPE_BULK)
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]
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)
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]
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interfaces = util.join_interfaces(cdc_interfaces, msc_interfaces)
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cdc_function = standard.InterfaceAssociationDescriptor(
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bFirstInterface=interfaces.index(cdc_interfaces[0]),
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bInterfaceCount=len(cdc_interfaces),
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bFunctionClass=0x2, # Communications Device Class
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bFunctionSubClass=0x2, # Abstract control model
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bFunctionProtocol=0x1) # Common AT Commands
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configuration = standard.ConfigurationDescriptor(
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wTotalLength=(standard.ConfigurationDescriptor.bLength +
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cdc_function.bLength +
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sum([len(bytes(x)) for x in interfaces])),
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bNumInterfaces=len(interfaces))
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descriptor_list = [device, configuration, cdc_function]
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descriptor_list.extend(interfaces)
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descriptor_list.extend(strings)
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output_file = args.output_file
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output_file.write("#include <stdint.h>\n\n")
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output_file.write("#include \"tools/autogen_usb_descriptor.h\"\n\n")
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output_file.write("uint8_t usb_descriptors[] = {\n")
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descriptor_length = 0
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serial_number_offset = None
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for descriptor in descriptor_list:
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output_file.write("// " + str(descriptor) + "\n")
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b = bytes(descriptor)
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i = 0
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if descriptor == serial_number:
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# Add two for the length and descriptor type bytes.
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serial_number_offset = descriptor_length + 2
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# This prints each subdescriptor on a separate line.
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while i < len(b):
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length = b[i]
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for j in range(length):
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output_file.write("0x{:02x}, ".format(b[i + j]))
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output_file.write("\n")
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i += length
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descriptor_length += length
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output_file.write("\n")
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output_file.write("};\n\n")
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output_file.write("struct usbd_descriptors descriptor_bounds = " +
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"{usb_descriptors," +
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" usb_descriptors + sizeof(usb_descriptors)};\n")
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output_file.write("uint8_t* serial_number = usb_descriptors + " +
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str(serial_number_offset) + ";\n")
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output_file.write("uint8_t serial_number_length = " +
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str(args.serial_number_length) + ";\n")
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output_file.close()
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