diff options
Diffstat (limited to 'decoders/transitioncounter.py')
| -rw-r--r-- | decoders/transitioncounter.py | 122 |
1 files changed, 61 insertions, 61 deletions
diff --git a/decoders/transitioncounter.py b/decoders/transitioncounter.py index 996cf2e..d3fa732 100644 --- a/decoders/transitioncounter.py +++ b/decoders/transitioncounter.py @@ -17,6 +17,7 @@ ## along with this program; if not, write to the Free Software ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA ## + import sigrok lastsample = None @@ -25,79 +26,78 @@ transitions = None rising = None falling = None - def decode(sampledata): - """Counts the low->high and high->low transitions in the specified - channel(s) of the signal.""" - global lastsample - global oldbit, transitions, rising, falling + """Counts the low->high and high->low transitions in the specified + channel(s) of the signal.""" + global lastsample + global oldbit, transitions, rising, falling + + # TODO: Don't hardcode the number of channels. + channels = 8 + + # FIXME: Get the data in the correct format in the first place. + inbuf = [ord(x) for x in sampledata['data']] - # TODO: Don't hardcode the number of channels. - channels = 8 + if lastsample == None: + oldbit = [0] * channels + transitions = [0] * channels + rising = [0] * channels + falling = [0] * channels - # FIXME: Get the data in the correct format in the first place. - inbuf = [ord(x) for x in sampledata['data']] + # Initial values. + lastsample = inbuf[0] + for i in range(channels): + oldbit[i] = (lastsample & (1 << i)) >> i - if lastsample == None: - oldbit = [0] * channels - transitions = [0] * channels - rising = [0] * channels - falling = [0] * channels + # TODO: Handle LAs with more/less than 8 channels. + for s in inbuf: + # Optimization: Skip identical bytes (no transitions). + if lastsample != s: + for i in range(channels): + curbit = (s & (1 << i)) >> i + # Optimization: Skip identical bits (no transitions). + if oldbit[i] == curbit: + continue + elif (oldbit[i] == 0 and curbit == 1): + rising[i] += 1 + elif (oldbit[i] == 1 and curbit == 0): + falling[i] += 1 + oldbit[i] = curbit - # Initial values. - lastsample = inbuf[0] - for i in range(channels): - oldbit[i] = (lastsample & (1 << i)) >> i - - # TODO: Handle LAs with more/less than 8 channels. - for s in inbuf: - # Optimization: Skip identical bytes (no transitions). - if lastsample != s: - for i in range(channels): - curbit = (s & (1 << i)) >> i - # Optimization: Skip identical bits (no transitions). - if oldbit[i] == curbit: - continue - elif (oldbit[i] == 0 and curbit == 1): - rising[i] += 1 - elif (oldbit[i] == 1 and curbit == 0): - falling[i] += 1 - oldbit[i] = curbit + # Total number of transitions is the sum of rising and falling edges. + for i in range(channels): + transitions[i] = rising[i] + falling[i] - # Total number of transitions is the sum of rising and falling edges. - for i in range(channels): - transitions[i] = rising[i] + falling[i] - - lastsample = s - print(transitions) + lastsample = s + print(transitions) - sigrok.put(sampledata) + sigrok.put(sampledata) register = { - 'id': 'transitioncounter', - 'name': 'Transition counter', - 'longname': '...', - 'desc': 'Counts rising/falling edges in the signal.', - 'longdesc': '...', - 'author': 'Uwe Hermann', - 'email': 'uwe@hermann-uwe.de', - 'license': 'gplv2+', - 'in': ['logic'], - 'out': ['transitioncounts'], - 'probes': [ - # All probes. - ], - 'options': { - # No options so far. - }, - # 'start': start, - # 'report': report, + 'id': 'transitioncounter', + 'name': 'Transition counter', + 'longname': '...', + 'desc': 'Counts rising/falling edges in the signal.', + 'longdesc': '...', + 'author': 'Uwe Hermann', + 'email': 'uwe@hermann-uwe.de', + 'license': 'gplv2+', + 'in': ['logic'], + 'out': ['transitioncounts'], + 'probes': [ + # All probes. + ], + 'options': { + # No options so far. + }, + # 'start': start, + # 'report': report, } # Use psyco (if available) as it results in huge performance improvements. try: - import psyco - psyco.bind(decode) + import psyco + psyco.bind(decode) except ImportError: - pass + pass |