diff options
Diffstat (limited to 'decoders/spi/pd.py')
| -rw-r--r-- | decoders/spi/pd.py | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/decoders/spi/pd.py b/decoders/spi/pd.py index 888cbd3..b18d021 100644 --- a/decoders/spi/pd.py +++ b/decoders/spi/pd.py @@ -88,6 +88,7 @@ class Decoder(srd.Decoder): ] def __init__(self): + self.samplerate = None self.oldsck = 1 self.bitcount = 0 self.mosidata = 0 @@ -100,9 +101,15 @@ class Decoder(srd.Decoder): self.oldpins = None self.state = 'IDLE' + def metadata(self, key, value): + if key == srd.SRD_CONF_SAMPLERATE: + self.samplerate = value + def start(self): self.out_proto = self.add(srd.OUTPUT_PYTHON, 'spi') self.out_ann = self.add(srd.OUTPUT_ANN, 'spi') + self.out_bitrate = self.register(srd.OUTPUT_META, + meta=(int, 'Bitrate', 'Bitrate during transfers')) def report(self): return 'SPI: %d bytes received' % self.bytesreceived @@ -143,11 +150,19 @@ class Decoder(srd.Decoder): if self.bitcount != ws: return + # Pass MOSI and MISO to the next PD up the stack self.putpw(['DATA', self.mosidata, self.misodata]) + + # Annotations self.putw([0, ['%02X/%02X' % (self.mosidata, self.misodata)]]) self.putw([1, ['%02X' % self.misodata]]) self.putw([2, ['%02X' % self.mosidata]]) + # Meta bitrate + elapsed = 1 / float(self.samplerate) * (self.samplenum - self.startsample + 1) + bitrate = int(1 / elapsed * self.options['wordsize']) + self.put(self.startsample, self.samplenum, self.out_bitrate, bitrate) + if self.cs_was_deasserted_during_data_word: self.putw([3, ['CS# was deasserted during this data word!']]) @@ -187,6 +202,8 @@ class Decoder(srd.Decoder): self.handle_bit(miso, mosi, sck, cs) def decode(self, ss, es, data): + if self.samplerate is None: + raise Exception("Cannot decode without samplerate.") # TODO: Either MISO or MOSI could be optional. CS# is optional. for (self.samplenum, pins) in data: |