mirror of
https://github.com/tillitis/tillitis-key1.git
synced 2024-12-26 16:09:42 -05:00
57 lines
2.0 KiB
Python
57 lines
2.0 KiB
Python
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#!/usr/bin/env python3
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def descriptor_to_string(descriptor):
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""" Convert a bytes object containing a USB string descriptor into a python string"""
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bLength = descriptor[0]
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if bLength != len(descriptor):
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raise Exception('Descriptor length mismatch, length_field:{} actual_length:{}'.format(
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bLength,
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len(descriptor)
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))
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bDescriptorType = descriptor[1]
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if bDescriptorType != 0x03:
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raise Exception('Descriptor type mismatch, bDescriptorType:{02x} expected:0x03'.format(
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bDescriptorType
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))
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return descriptor[2:].decode('utf-16', errors='strict')
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def string_to_descriptor(string):
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""" Convert a python string into a bytes object containing a USB string descriptor"""
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descriptor = bytearray()
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descriptor.append(0x00) # placeholder for length
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descriptor.append(0x03)
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descriptor.extend(string.encode('utf-16')[2:]) # crop the BOM
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descriptor[0] = len(descriptor)
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return bytes(descriptor)
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if __name__ == "__main__":
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manufacturer = 'Tillitis'
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product = 'MTA1-USB-V1'
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serial = "68de5d27-e223-4874-bc76-a54d6e84068f"
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with open('usb_strings.h', 'w') as f:
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f.write('#ifndef USB_STRINGS\n')
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f.write('#define USB_STRINGS\n')
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f.write('unsigned char __code Prod_Des[]={{ // "{}"\n'.format(product))
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f.write(' ')
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f.write(', '.join(['0x{:02x}'.format(i) for i in string_to_descriptor(product)]))
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f.write('\n};\n\n')
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f.write('unsigned char __code Manuf_Des[]={{ // "{}"\n'.format(manufacturer))
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f.write(' ')
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f.write(', '.join(['0x{:02x}'.format(i) for i in string_to_descriptor(manufacturer)]))
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f.write('\n};\n\n')
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f.write('unsigned char __code SerDes[]={{ // "{}"\n'.format(serial))
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f.write(' ')
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f.write(', '.join(['0x{:02x}'.format(i) for i in string_to_descriptor(serial)]))
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f.write('\n};\n\n')
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f.write('#endif\n')
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