diff options
Diffstat (limited to 'decoders/i2c')
| -rw-r--r-- | decoders/i2c/pd.py | 46 |
1 files changed, 23 insertions, 23 deletions
diff --git a/decoders/i2c/pd.py b/decoders/i2c/pd.py index 8297662..7309226 100644 --- a/decoders/i2c/pd.py +++ b/decoders/i2c/pd.py @@ -112,12 +112,12 @@ class Decoder(srd.Decoder): self.ss = self.es = self.ss_byte = -1 self.bitcount = 0 self.databyte = 0 - self.wr = -1 - self.is_repeat_start = 0 + self.is_write = None + self.is_repeat_start = False self.state = 'FIND START' self.pdu_start = None self.pdu_bits = 0 - self.bits = [] + self.data_bits = [] def metadata(self, key, value): if key == srd.SRD_CONF_SAMPLERATE: @@ -143,14 +143,14 @@ class Decoder(srd.Decoder): self.ss, self.es = self.samplenum, self.samplenum self.pdu_start = self.samplenum self.pdu_bits = 0 - cmd = 'START REPEAT' if (self.is_repeat_start == 1) else 'START' + cmd = 'START REPEAT' if self.is_repeat_start else 'START' self.putp([cmd, None]) self.putx([proto[cmd][0], proto[cmd][1:]]) self.state = 'FIND ADDRESS' self.bitcount = self.databyte = 0 - self.is_repeat_start = 1 - self.wr = -1 - self.bits = [] + self.is_repeat_start = True + self.is_write = None + self.data_bits = [] # Gather 8 bits of data plus the ACK/NACK bit. def handle_address_or_data(self, pins): @@ -167,12 +167,12 @@ class Decoder(srd.Decoder): # Store individual bits and their start/end samplenumbers. # In the list, index 0 represents the LSB (I²C transmits MSB-first). - self.bits.insert(0, [sda, self.samplenum, self.samplenum]) + self.data_bits.insert(0, [sda, self.samplenum, self.samplenum]) if self.bitcount > 0: - self.bits[1][2] = self.samplenum + self.data_bits[1][2] = self.samplenum if self.bitcount == 7: - self.bitwidth = self.bits[1][2] - self.bits[2][2] - self.bits[0][2] += self.bitwidth + self.bitwidth = self.data_bits[1][2] - self.data_bits[2][2] + self.data_bits[0][2] += self.bitwidth # Return if we haven't collected all 8 + 1 bits, yet. if self.bitcount < 7: @@ -182,37 +182,37 @@ class Decoder(srd.Decoder): d = self.databyte if self.state == 'FIND ADDRESS': # The READ/WRITE bit is only in address bytes, not data bytes. - self.wr = 0 if (self.databyte & 1) else 1 + self.is_write = False if (self.databyte & 1) else True if self.options['address_format'] == 'shifted': d = d >> 1 bin_class = -1 - if self.state == 'FIND ADDRESS' and self.wr == 1: + if self.state == 'FIND ADDRESS' and self.is_write: cmd = 'ADDRESS WRITE' bin_class = 1 - elif self.state == 'FIND ADDRESS' and self.wr == 0: + elif self.state == 'FIND ADDRESS' and not self.is_write: cmd = 'ADDRESS READ' bin_class = 0 - elif self.state == 'FIND DATA' and self.wr == 1: + elif self.state == 'FIND DATA' and self.is_write: cmd = 'DATA WRITE' bin_class = 3 - elif self.state == 'FIND DATA' and self.wr == 0: + elif self.state == 'FIND DATA' and not self.is_write: cmd = 'DATA READ' bin_class = 2 self.ss, self.es = self.ss_byte, self.samplenum + self.bitwidth - self.putp(['BITS', self.bits]) + self.putp(['BITS', self.data_bits]) self.putp([cmd, d]) self.putb([bin_class, bytes([d])]) - for bit in self.bits: + for bit in self.data_bits: self.put(bit[1], bit[2], self.out_ann, [5, ['%d' % bit[0]]]) if cmd.startswith('ADDRESS'): self.ss, self.es = self.samplenum, self.samplenum + self.bitwidth - w = ['Write', 'Wr', 'W'] if self.wr else ['Read', 'Rd', 'R'] + w = ['Write', 'Wr', 'W'] if self.is_write else ['Read', 'Rd', 'R'] self.putx([proto[cmd][0], w]) self.ss, self.es = self.ss_byte, self.samplenum @@ -221,7 +221,7 @@ class Decoder(srd.Decoder): # Done with this packet. self.bitcount = self.databyte = 0 - self.bits = [] + self.data_bits = [] self.state = 'FIND ACK' def get_ack(self, pins): @@ -246,9 +246,9 @@ class Decoder(srd.Decoder): self.putp([cmd, None]) self.putx([proto[cmd][0], proto[cmd][1:]]) self.state = 'FIND START' - self.is_repeat_start = 0 - self.wr = -1 - self.bits = [] + self.is_repeat_start = False + self.is_write = None + self.data_bits = [] def decode(self): while True: |