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authorUwe Hermann <uwe@hermann-uwe.de>2012-11-21 22:43:02 +0100
committerUwe Hermann <uwe@hermann-uwe.de>2012-11-24 20:21:19 +0100
commit24c74fd30fb161837c5f8b01baf3c0fe2dfa4ed5 (patch)
tree43d0c24c6a18e824d9d66a390bad9cff3aa081af /decoders/transitioncounter/transitioncounter.py
parent23f999aa996e54cd73cb54d5e254d1445d65847d (diff)
downloadlibsigrokdecode-24c74fd30fb161837c5f8b01baf3c0fe2dfa4ed5.tar.gz
libsigrokdecode-24c74fd30fb161837c5f8b01baf3c0fe2dfa4ed5.zip
All PDs: Name the files pd.py consistently.
The Python module name is determined by the directory name (e.g. dcf77), the *.py file names in that directory don't matter and can be kept consistent.
Diffstat (limited to 'decoders/transitioncounter/transitioncounter.py')
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diff --git a/decoders/transitioncounter/transitioncounter.py b/decoders/transitioncounter/transitioncounter.py
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-##
-## This file is part of the sigrok project.
-##
-## Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
-##
-## This program is free software; you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation; either version 2 of the License, or
-## (at your option) any later version.
-##
-## This program is distributed in the hope that it will be useful,
-## but WITHOUT ANY WARRANTY; without even the implied warranty of
-## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-## GNU General Public License for more details.
-##
-## You should have received a copy of the GNU General Public License
-## along with this program; if not, write to the Free Software
-## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-##
-
-# Transition counter protocol decoder
-
-import sigrokdecode as srd
-
-class Decoder(srd.Decoder):
- api_version = 1
- id = 'transitioncounter'
- name = 'Transition counter'
- longname = 'Pin transition counter'
- desc = 'Counts rising/falling edges in the signal.'
- license = 'gplv2+'
- inputs = ['logic']
- outputs = ['transitioncounts']
- probes = []
- optional_probes = []
- options = {}
- annotations = [
- ['TODO', 'TODO'],
- ]
-
- def __init__(self, **kwargs):
- self.channels = -1
- self.lastsample = None
-
- def start(self, metadata):
- # self.out_proto = self.add(srd.OUTPUT_PROTO, 'transitioncounter')
- self.out_ann = self.add(srd.OUTPUT_ANN, 'transitioncounter')
-
- def report(self):
- pass
-
- def decode(self, ss, es, data):
-
- for (samplenum, s) in data:
-
- # ...
- if self.channels == -1:
- self.channels = len(s)
- self.oldbit = [0] * self.channels
- self.transitions = [0] * self.channels
- self.rising = [0] * self.channels
- self.falling = [0] * self.channels
-
- # Optimization: Skip identical samples (no transitions).
- if self.lastsample == s:
- continue
-
- # Upon the first sample, store the initial values.
- if self.lastsample == None:
- self.lastsample = s
- for i in range(self.channels):
- self.oldbit[i] = self.lastsample[i]
-
- # Iterate over all channels/probes in this sample.
- # Count rising and falling edges for each channel.
- for i in range(self.channels):
- curbit = s[i]
- # Optimization: Skip identical bits (no transitions).
- if self.oldbit[i] == curbit:
- continue
- elif (self.oldbit[i] == 0 and curbit == 1):
- self.rising[i] += 1
- elif (self.oldbit[i] == 1 and curbit == 0):
- self.falling[i] += 1
- self.oldbit[i] = curbit
-
- # Save the current sample as 'lastsample' for the next round.
- self.lastsample = s
-
- # Total number of transitions = rising + falling edges.
- for i in range(self.channels):
- self.transitions[i] = self.rising[i] + self.falling[i]
-
- # TODO: Which output format?
- # TODO: How to only output something after the last chunk of data?
- outdata = []
- for i in range(self.channels):
- outdata.append([self.transitions[i], self.rising[i],
- self.falling[i]])
-
- if outdata != []:
- # self.put(0, 0, self.out_proto, out_proto)
- self.put(0, 0, self.out_ann, [0, [str(outdata)]])
-