'SE1': 3,
}
+class SamplerateError(Exception):
+ pass
+
class Decoder(srd.Decoder):
- api_version = 1
+ api_version = 2
id = 'usb_signalling'
name = 'USB signalling'
longname = 'Universal Serial Bus (LS/FS) signalling'
license = 'gplv2+'
inputs = ['logic']
outputs = ['usb_signalling']
- probes = (
+ channels = (
{'id': 'dp', 'name': 'D+', 'desc': 'USB D+ signal'},
{'id': 'dm', 'name': 'D-', 'desc': 'USB D- signal'},
)
self.oldsym = sym
def decode(self, ss, es, data):
- if self.samplerate is None:
- raise Exception("Cannot decode without samplerate.")
+ if not self.samplerate:
+ raise SamplerateError('Cannot decode without samplerate.')
for (self.samplenum, pins) in data:
# State machine.
if self.state == 'IDLE':
self.get_bit(sym)
elif self.state == 'GET EOP':
self.get_eop(sym)
- else:
- raise Exception('Invalid state: %s' % self.state)
-