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authorUwe Hermann <uwe@hermann-uwe.de>2012-01-15 15:36:01 +0100
committerUwe Hermann <uwe@hermann-uwe.de>2012-01-15 18:18:23 +0100
commit64c29e28e0efa184319f7831b3eca18c7f73f7d0 (patch)
tree16b7c84aa9edefb61e01f70384ff280edb3f3483 /decoders/transitioncounter
parentd0a0ed032e0120140a28e93ac42753786bf0087b (diff)
downloadlibsigrokdecode-64c29e28e0efa184319f7831b3eca18c7f73f7d0.tar.gz
libsigrokdecode-64c29e28e0efa184319f7831b3eca18c7f73f7d0.zip
srd: Each PD now has its own subdirectory.
Diffstat (limited to 'decoders/transitioncounter')
-rw-r--r--decoders/transitioncounter/Makefile.am26
-rw-r--r--decoders/transitioncounter/__init__.py22
-rw-r--r--decoders/transitioncounter/transitioncounter.py100
3 files changed, 148 insertions, 0 deletions
diff --git a/decoders/transitioncounter/Makefile.am b/decoders/transitioncounter/Makefile.am
new file mode 100644
index 0000000..74688a3
--- /dev/null
+++ b/decoders/transitioncounter/Makefile.am
@@ -0,0 +1,26 @@
+##
+## This file is part of the sigrok project.
+##
+## Copyright (C) 2012 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
+##
+
+pkgdatadir = $(DECODERS_DIR)/transitioncounter
+
+dist_pkgdata_DATA = __init__.py transitioncounter.py
+
+CLEANFILES = *.pyc
+
diff --git a/decoders/transitioncounter/__init__.py b/decoders/transitioncounter/__init__.py
new file mode 100644
index 0000000..bdf296b
--- /dev/null
+++ b/decoders/transitioncounter/__init__.py
@@ -0,0 +1,22 @@
+##
+## This file is part of the sigrok project.
+##
+## Copyright (C) 2012 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
+##
+
+from .transitioncounter import *
+
diff --git a/decoders/transitioncounter/transitioncounter.py b/decoders/transitioncounter/transitioncounter.py
new file mode 100644
index 0000000..4c832b0
--- /dev/null
+++ b/decoders/transitioncounter/transitioncounter.py
@@ -0,0 +1,100 @@
+##
+## 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
+##
+
+import sigrokdecode as srd
+
+class Decoder(srd.Decoder):
+ id = 'transitioncounter'
+ name = 'Transition counter'
+ longname = 'Pin transition counter'
+ desc = 'Counts rising/falling edges in the signal.'
+ longdesc = '...'
+ license = 'gplv2+'
+ inputs = ['logic']
+ outputs = ['transitioncounts']
+ 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 += [[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)]])
+