diff options
Diffstat (limited to 'decoders')
| -rw-r--r-- | decoders/uart/pd.py | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/decoders/uart/pd.py b/decoders/uart/pd.py index 2ba8c57..f89c6e5 100644 --- a/decoders/uart/pd.py +++ b/decoders/uart/pd.py @@ -41,6 +41,9 @@ This is the list of <ptype>s and their respective <pdata> values: the expected parity value, the second is the actual parity value. - TODO: Frame error? - 'BREAK': The data is always 0. + - 'FRAME': The data is always a tuple containing two items: The (integer) + value of the UART data, and a boolean which reflects the validity of the + UART frame. The <rxtx> field is 0 for RX packets, 1 for TX packets. ''' @@ -178,6 +181,7 @@ class Decoder(srd.Decoder): self.samplerate = None self.samplenum = 0 self.frame_start = [-1, -1] + self.frame_valid = [None, None] self.startbit = [-1, -1] self.cur_data_bit = [0, 0] self.datavalue = [0, 0] @@ -214,6 +218,7 @@ class Decoder(srd.Decoder): def wait_for_start_bit(self, rxtx, signal): # Save the sample number where the start bit begins. self.frame_start[rxtx] = self.samplenum + self.frame_valid[rxtx] = True self.state[rxtx] = 'GET START BIT' @@ -225,6 +230,10 @@ class Decoder(srd.Decoder): if self.startbit[rxtx] != 0: self.putp(['INVALID STARTBIT', rxtx, self.startbit[rxtx]]) self.putg([rxtx + 10, ['Frame error', 'Frame err', 'FE']]) + self.frame_valid[rxtx] = False + es = self.samplenum + ceil(self.bit_width / 2.0) + self.putpse(self.frame_start[rxtx], es, ['FRAME', rxtx, + (self.datavalue[rxtx], self.frame_valid[rxtx])]) self.state[rxtx] = 'WAIT FOR START BIT' return @@ -331,6 +340,7 @@ class Decoder(srd.Decoder): # TODO: Return expected/actual parity values. self.putp(['PARITY ERROR', rxtx, (0, 1)]) # FIXME: Dummy tuple... self.putg([rxtx + 6, ['Parity error', 'Parity err', 'PE']]) + self.frame_valid[rxtx] = False self.state[rxtx] = 'GET STOP BITS' @@ -342,11 +352,16 @@ class Decoder(srd.Decoder): if self.stopbit1[rxtx] != 1: self.putp(['INVALID STOPBIT', rxtx, self.stopbit1[rxtx]]) self.putg([rxtx + 10, ['Frame error', 'Frame err', 'FE']]) - # TODO: Abort? Ignore the frame? Other? + self.frame_valid[rxtx] = False self.putp(['STOPBIT', rxtx, self.stopbit1[rxtx]]) self.putg([rxtx + 4, ['Stop bit', 'Stop', 'T']]) + # Pass the complete UART frame to upper layers. + es = self.samplenum + ceil(self.bit_width / 2.0) + self.putpse(self.frame_start[rxtx], es, ['FRAME', rxtx, + (self.datavalue[rxtx], self.frame_valid[rxtx])]) + self.state[rxtx] = 'WAIT FOR START BIT' def handle_break(self, rxtx): |