diff options
| -rw-r--r-- | decoders/ir_nec/pd.py | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/decoders/ir_nec/pd.py b/decoders/ir_nec/pd.py index ecd2b7a..f5c4799 100644 --- a/decoders/ir_nec/pd.py +++ b/decoders/ir_nec/pd.py @@ -23,14 +23,16 @@ import sigrokdecode as srd # Concentrate all timing constraints of the IR protocol here in a single # location at the top of the source, to raise awareness and to simplify -# review and adjustment. -_TIME_TOL = 5 # tolerance, in percent -_TIME_LC = 13.5 # leader code, in ms -_TIME_RC = 11.25 # repeat code, in ms +# review and adjustment. The tolerance is an arbitrary choice, available +# literature does not mention any. The inter-frame timeout is not a part +# of the protocol, but an implementation detail of this sigrok decoder. +_TIME_TOL = 8 # tolerance, in percent +_TIME_IDLE = 20.0 # inter-frame timeout, in ms +_TIME_LC = 13.5 # leader code, in ms +_TIME_RC = 11.25 # repeat code, in ms +_TIME_ONE = 2.25 # one data bit, in ms _TIME_ZERO = 1.125 # zero data bit, in ms -_TIME_ONE = 2.25 # one data bit, in ms _TIME_STOP = 0.652 # stop bit, in ms -_TIME_IDLE = 20.0 # inter frame timeout, in ms, arbitrary choice class SamplerateError(Exception): pass @@ -59,7 +61,6 @@ class Decoder(srd.Decoder): options = ( {'id': 'polarity', 'desc': 'Polarity', 'default': 'active-low', 'values': ('auto', 'active-low', 'active-high')}, - {'id': 'tolerance', 'desc': 'Timing tolerance (%)', 'default': _TIME_TOL}, {'id': 'cd_freq', 'desc': 'Carrier Frequency', 'default': 0}, {'id': 'extended', 'desc': 'Extended NEC Protocol', 'default': 'no', 'values': ('yes', 'no')}, @@ -148,7 +149,7 @@ class Decoder(srd.Decoder): self.samplerate = value def calc_rate(self): - self.tolerance = self.options['tolerance'] / 100 + self.tolerance = _TIME_TOL / 100 self.lc = int(self.samplerate * _TIME_LC / 1000) - 1 self.rc = int(self.samplerate * _TIME_RC / 1000) - 1 self.dazero = int(self.samplerate * _TIME_ZERO / 1000) - 1 |