misoclib/dvisampler/decoding.py

   1 from migen.fhdl.std import *
   2 from migen.genlib.record import Record
   3
   4 from misoclib.dvisampler.common import control_tokens, channel_layout
   5
   6 class Decoding(Module):
   7         def __init__(self):
   8                 self.valid_i = Signal()
   9                 self.input = Signal(10)
  10                 self.valid_o = Signal()
  11                 self.output = Record(channel_layout)
  12
  13                 ###
  14
  15                 self.sync.pix += self.output.de.eq(1)
  16                 for i, t in enumerate(control_tokens):
  17                         self.sync.pix += If(self.input == t,
  18                                 self.output.de.eq(0),
  19                                 self.output.c.eq(i)
  20                         )
  21                 self.sync.pix += self.output.d[0].eq(self.input[0] ^ self.input[9])
  22                 for i in range(1, 8):
  23                         self.sync.pix += self.output.d[i].eq(self.input[i] ^ self.input[i-1] ^ ~self.input[8])
  24                 self.sync.pix += self.valid_o.eq(self.valid_i)