diff options
Diffstat (limited to 'decoders/uart')
| -rw-r--r-- | decoders/uart/pd.py | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/decoders/uart/pd.py b/decoders/uart/pd.py index a2e1f7f..66bcba8 100644 --- a/decoders/uart/pd.py +++ b/decoders/uart/pd.py @@ -114,7 +114,7 @@ class Decoder(srd.Decoder): {'id': 'parity', 'desc': 'Parity', 'default': 'none', 'values': ('none', 'odd', 'even', 'zero', 'one', 'ignore')}, {'id': 'stop_bits', 'desc': 'Stop bits', 'default': 1.0, - 'values': (0.0, 0.5, 1.0, 1.5)}, + 'values': (0.0, 0.5, 1.0, 1.5, 2.0)}, {'id': 'bit_order', 'desc': 'Bit order', 'default': 'lsb-first', 'values': ('lsb-first', 'msb-first')}, {'id': 'format', 'desc': 'Data format', 'default': 'hex', @@ -211,7 +211,7 @@ class Decoder(srd.Decoder): self.cur_data_bit = [0, 0] self.datavalue = [0, 0] self.paritybit = [-1, -1] - self.stopbit1 = [-1, -1] + self.stopbits = [[], []] self.startsample = [-1, -1] self.state = ['WAIT FOR START BIT', 'WAIT FOR START BIT'] self.databits = [[], []] @@ -269,9 +269,13 @@ class Decoder(srd.Decoder): self.advance_state(rxtx, signal, fatal = True, idle = es) return + # Reset internal state for the pending UART frame. self.cur_data_bit[rxtx] = 0 self.datavalue[rxtx] = 0 + self.paritybit[rxtx] = -1 + self.stopbits[rxtx].clear() self.startsample[rxtx] = -1 + self.databits[rxtx].clear() self.putp(['STARTBIT', rxtx, self.startbit[rxtx]]) self.putg([Ann.RX_START + rxtx, ['Start bit', 'Start', 'S']]) @@ -398,20 +402,21 @@ class Decoder(srd.Decoder): self.advance_state(rxtx, signal) - # TODO: Currently only supports 1 stop bit. def get_stop_bits(self, rxtx, signal): - self.stopbit1[rxtx] = signal + self.stopbits[rxtx].append(signal) # Stop bits must be 1. If not, we report an error. - if self.stopbit1[rxtx] != 1: - self.putp(['INVALID STOPBIT', rxtx, self.stopbit1[rxtx]]) + if signal != 1: + self.putp(['INVALID STOPBIT', rxtx, signal]) self.putg([Ann.RX_WARN + rxtx, ['Frame error', 'Frame err', 'FE']]) self.frame_valid[rxtx] = False - self.putp(['STOPBIT', rxtx, self.stopbit1[rxtx]]) + self.putp(['STOPBIT', rxtx, signal]) self.putg([Ann.RX_STOP + rxtx, ['Stop bit', 'Stop', 'T']]) - # Postprocess the UART frame + # Postprocess the UART frame after all STOP bits were seen. + if len(self.stopbits[rxtx]) < self.options['stop_bits']: + return self.advance_state(rxtx, signal) def advance_state(self, rxtx, signal = None, fatal = False, idle = None): @@ -497,8 +502,10 @@ class Decoder(srd.Decoder): elif state == 'GET PARITY BIT': bitnum = 1 + self.options['data_bits'] elif state == 'GET STOP BITS': + # TODO: Currently does not support half STOP bits. bitnum = 1 + self.options['data_bits'] bitnum += 0 if self.options['parity'] == 'none' else 1 + bitnum += len(self.stopbits[rxtx]) want_num = ceil(self.get_sample_point(rxtx, bitnum)) return {'skip': want_num - self.samplenum} |