Mercurial > repos > blastem
annotate analyze_olp.py @ 505:b7b7a1cab44a
The local clone on my laptop got messed up and some changes had not been pushed. This commit represents the status of the working copy from that clone. It unfortunately contains some changes that I did not intend to commit yet, but this seems like the best option at the moment.
author | Michael Pavone <pavone@retrodev.com> |
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date | Mon, 06 Jan 2014 22:54:05 -0800 |
parents | be9c7b3e25ee |
children | b290343e5664 |
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1 #!/usr/bin/env python |
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2 |
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3 from zipfile import ZipFile |
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4 from sys import exit, argv |
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5 |
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6 def detect_rise(last, sample, bit): |
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7 mask = 1 << bit |
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8 return (not last & mask) and (sample & mask) |
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9 |
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10 def detect_fall(last, sample, bit): |
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11 mask = 1 << bit |
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12 return (last & mask) and (not sample & mask) |
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13 |
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14 def detect_high(sample, bit): |
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15 mask = 1 << bit |
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16 return sample & mask |
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17 |
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18 def detect_low(sample, bit): |
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19 mask = 1 << bit |
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20 return not sample & mask |
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21 |
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22 def analyze_delays(chanmap, datafile): |
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23 m68k_clk = chanmap['M68K CLK'] |
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24 m_as = chanmap['!AS'] |
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25 last = False |
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26 clks = 0 |
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27 as_start = 0 |
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28 for line in datafile.readlines(): |
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29 line = line.strip() |
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30 if line and not line.startswith(';'): |
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31 sample,_,num = line.partition('@') |
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32 sample = int(sample, 16) |
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33 if not (last is False): |
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34 if detect_rise(last, sample, m68k_clk): |
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35 clks = clks + 1 |
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36 if detect_rise(last, sample, m_as): |
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37 as_clks = clks - as_start |
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38 if as_clks > 2: |
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39 print '!AS held for', as_clks, 'cycles starting (delay of ' + str(as_clks - 2) + ') at', as_start, 'and ending at', clks |
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40 elif detect_fall(last, sample, m_as): |
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41 as_start = clks |
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42 last = sample |
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43 |
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44 def main(args): |
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45 if len(args) < 2: |
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46 print 'Usage: analyze_olp.py filename' |
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47 exit(1) |
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48 olpfile = ZipFile(args[1], "r") |
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49 channelfile = olpfile.open('channel.labels') |
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50 channels = [line.strip() for line in channelfile.readlines()] |
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51 channelfile.close() |
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52 chanmap = {} |
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53 for i in xrange(0, len(channels)): |
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54 chanmap[channels[i]] = i |
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55 datafile = olpfile.open('data.ols') |
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56 analyze_delays(chanmap, datafile) |
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57 |
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58 |
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59 if __name__ == '__main__': |
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60 main(argv) |