## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
-## along with this program; if not, write to the Free Software
-## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+## along with this program; if not, see <http://www.gnu.org/licenses/>.
##
-# Generic I2C demultiplexing protocol decoder
-
import sigrokdecode as srd
class Decoder(srd.Decoder):
- api_version = 1
+ api_version = 3
id = 'i2cdemux'
- name = 'I2C demux'
- longname = 'I2C demultiplexer'
- desc = 'Demux I2C packets into per-slave-address streams.'
+ name = 'I²C demux'
+ longname = 'I²C demultiplexer'
+ desc = 'Demux I²C packets into per-slave-address streams.'
license = 'gplv2+'
inputs = ['i2c']
outputs = [] # TODO: Only known at run-time.
- probes = []
- optional_probes = []
- options = {}
- annotations = []
+ tags = ['Util']
+
+ def __init__(self):
+ self.reset()
- def __init__(self, **kwargs):
- self.packets = [] # Local cache of I2C packets
+ def reset(self):
+ self.packets = [] # Local cache of I²C packets
self.slaves = [] # List of known slave addresses
self.stream = -1 # Current output stream
self.streamcount = 0 # Number of created output streams
def start(self):
- self.out_proto = []
+ self.out_python = []
- def report(self):
- pass
-
- # Grab I2C packets into a local cache, until an I2C STOP condition
+ # Grab I²C packets into a local cache, until an I²C STOP condition
# packet comes along. At some point before that STOP condition, there
# will have been an ADDRESS READ or ADDRESS WRITE which contains the
- # I2C address of the slave that the master wants to talk to.
+ # I²C address of the slave that the master wants to talk to.
# We use this slave address to figure out which output stream should
# get the whole chunk of packets (from START to STOP).
def decode(self, ss, es, data):
cmd, databyte = data
- # Add the I2C packet to our local cache.
+ # Add the I²C packet to our local cache.
self.packets.append([ss, es, data])
if cmd in ('ADDRESS READ', 'ADDRESS WRITE'):
# We're never seen this slave, add a new stream.
self.slaves.append(databyte)
- self.out_proto.append(self.add(srd.OUTPUT_PYTHON,
- 'i2c-%s' % hex(databyte)))
+ self.out_python.append(self.register(srd.OUTPUT_PYTHON,
+ proto_id='i2c-%s' % hex(databyte)))
self.stream = self.streamcount
self.streamcount += 1
elif cmd == 'STOP':
if self.stream == -1:
raise Exception('Invalid stream!') # FIXME?
- # Send the whole chunk of I2C packets to the correct stream.
+ # Send the whole chunk of I²C packets to the correct stream.
for p in self.packets:
- self.put(p[0], p[1], self.out_proto[self.stream], p[2])
+ self.put(p[0], p[1], self.out_python[self.stream], p[2])
self.packets = []
self.stream = -1
else:
- pass # Do nothing, only add the I2C packet to our cache.
-
+ pass # Do nothing, only add the I²C packet to our cache.