deskthority

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#!/usr/bin/python3
# -*- Mode: Python; coding: utf-8; indent-tabs-mode: nil; tab-width: 4 -*-
#
# Converts Soarer's Logic Analyzer output into VCD format
#     https://deskthority.net/viewtopic.php?t=4567
#
# 'sctrace' record is comprised of seven hex characters(0-9A-F):
#     time: 4 chars/2 bytes; timestamp of event
#     stat: 2 chars/1 byte;  port state
#     flag: 1 char /4 bits;  timer event(1) or port state change event(0)

import sys

# https://github.com/westerndigitalcorporation/pyvcd
from vcd import VCDWriter

if len(sys.argv) < 2:
    print(f"Usage: {sys.argv[0]} infile")
    sys.exit(1)

# read 'sctrace' output file
with open(sys.argv[1], "r") as file:
    for line in file:
        for record in line.strip().split():
            if len(record) == 7:
                time = int(record[0:4], 16)
                port = int(record[4:6], 16)
                flag = int(record[6:7], 16)
                #print(time, port, flag)

# write VCD
from datetime import datetime
with VCDWriter(sys.stdout, timescale='1 us', date=datetime.utcnow().ctime()) as writer:

    # prams: scope, name, var_type, size
    port = writer.register_var('sctrace', 'port', 'wire', size=8)

    # read 'sctrace' output file
    with open(sys.argv[1], "r") as file:
        ext_time = 0
        for line in file:
            for record in line.strip().split():
                if len(record) == 7:
                    time = int(record[0:4], 16)
                    stat = int(record[4:6], 16)
                    flag = int(record[6:7], 16)

                    # timer overflow when flag == 1
                    if flag:
                        ext_time += 1

                    # time: 1/16 us(62.5 ns) per tick(@16MHz+Prescaler:0)
                    writer.change(port, ((ext_time * 0x10000) + time)/16, stat)