39 lines
1 KiB
Python
39 lines
1 KiB
Python
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#!/usr/bin/env python3
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# SPDX-License-Identifier: LGPL-3.0-or-later
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# Copyright (C) 2021 Daniel Thompson
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import sys
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def parse_record(view):
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'''Consume a single set of samples and format as a line for a CSV file.'''
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# Verify synchronization
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assert(view[0] == 0xffff)
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# Extract the timestamp and format it in ISO 8601 format
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(YY, MM, DD, hh, mm, ss) = view[1:7]
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print(f'"{YY:04}{MM:02}{DD:02}T{hh:02}{mm:02}{ss:02}"', end='')
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# Consume data until we reach the synchronization token
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offset = 8
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while offset < len(view) and view[offset] != 0xffff:
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print(f',{view[offset]}', end='')
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offset += 1
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# Close the current record and return
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print('')
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return offset
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# Open and read the file named in our first argument
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with open(sys.argv[1], 'rb') as f:
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rawdata = f.read()
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# Re-interpret the raw data as an array of 16-bit values
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view = memoryview(rawdata)
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data = view.cast('H')
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# Process the data one record at a time
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offset = 0
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while offset < len(data):
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offset += parse_record(data[offset:])
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