diff options
Diffstat (limited to 'decoders/uart/pd.py')
| -rw-r--r-- | decoders/uart/pd.py | 45 |
1 files changed, 22 insertions, 23 deletions
diff --git a/decoders/uart/pd.py b/decoders/uart/pd.py index 8db3e17..2c0a7da 100644 --- a/decoders/uart/pd.py +++ b/decoders/uart/pd.py @@ -395,6 +395,24 @@ class Decoder(srd.Decoder): cond = {'skip': want_num - self.samplenum} return cond + def inspect_sample(self, rxtx, signal, inv): + """Inspect a sample returned by .wait() for the specified UART line.""" + + if inv: + signal = not signal + + state = self.state[rxtx] + if state == 'WAIT FOR START BIT': + self.wait_for_start_bit(rxtx, signal) + elif state == 'GET START BIT': + self.get_start_bit(rxtx, signal) + elif state == 'GET DATA BITS': + self.get_data_bits(rxtx, signal) + elif state == 'GET PARITY BIT': + self.get_parity_bit(rxtx, signal) + elif state == 'GET STOP BITS': + self.get_stop_bits(rxtx, signal) + def decode(self): if not self.samplerate: raise SamplerateError('Cannot decode without samplerate.') @@ -413,26 +431,7 @@ class Decoder(srd.Decoder): if has_pin[TX]: conds.append(self.get_wait_cond(TX, inv[TX])) (rx, tx) = self.wait(conds) - if inv[RX]: - rx = not rx - if inv[TX]: - tx = not tx - - # State machine. - for rxtx in (RX, TX): - # Don't try to handle RX (or TX) if not supplied. - if not has_pin[rxtx]: - continue - - signal = rx if (rxtx == RX) else tx - - if self.state[rxtx] == 'WAIT FOR START BIT': - self.wait_for_start_bit(rxtx, signal) - elif self.state[rxtx] == 'GET START BIT': - self.get_start_bit(rxtx, signal) - elif self.state[rxtx] == 'GET DATA BITS': - self.get_data_bits(rxtx, signal) - elif self.state[rxtx] == 'GET PARITY BIT': - self.get_parity_bit(rxtx, signal) - elif self.state[rxtx] == 'GET STOP BITS': - self.get_stop_bits(rxtx, signal) + if has_pin[RX]: + self.inspect_sample(RX, rx, inv[RX]) + if has_pin[TX]: + self.inspect_sample(TX, tx, inv[TX]) |