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annotate analyze_olp.py @ 555:5af986d2b9da

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Start work on refactoring some of the backend code to allow more sharing between M68K and Z80 cores and possibly also between x86 and the ARM backend when it exists
author Michael Pavone <pavone@retrodev.com>
date Mon, 24 Feb 2014 00:39:02 -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)