diff options
Diffstat (limited to 'decoders/usb')
| -rw-r--r-- | decoders/usb/usb.py | 21 |
1 files changed, 9 insertions, 12 deletions
diff --git a/decoders/usb/usb.py b/decoders/usb/usb.py index 99dd4b5..bd402dd 100644 --- a/decoders/usb/usb.py +++ b/decoders/usb/usb.py @@ -22,15 +22,12 @@ import sigrokdecode as srd -# States -SE0, J, K, SE1 = 0, 1, 2, 3 - -# ... +# Symbols (used as states of our state machine, too) syms = { - (0, 0): SE0, - (1, 0): J, - (0, 1): K, - (1, 1): SE1, + (0, 0): 'SE0', + (1, 0): 'J', + (0, 1): 'K', + (1, 1): 'SE1', } # ... @@ -118,7 +115,7 @@ class Decoder(srd.Decoder): 'decoding, need at least 48MHz' % self.rate) # Initialise decoder state. - self.sym = J + self.sym = 'J' self.scount = 0 self.packet = '' @@ -144,12 +141,12 @@ class Decoder(srd.Decoder): continue # How many bits since the last transition? - if self.packet != '' or self.sym != J: + if self.packet != '' or self.sym != 'J': bitcount = int((self.scount - 1) * 12000000 / self.rate) else: bitcount = 0 - if self.sym == SE0: + if self.sym == 'SE0': if bitcount == 1: # End-Of-Packet (EOP) self.put(0, 0, self.out_ann, @@ -166,7 +163,7 @@ class Decoder(srd.Decoder): self.packet += '1' * bitcount # Handle bit stuffing. - if bitcount < 6 and sym != SE0: + if bitcount < 6 and sym != 'SE0': self.packet += '0' elif bitcount > 6: self.put(0, 0, self.out_ann, [0, ['BIT STUFF ERROR']]) |