+
+
+# # Transport layer
+#
+# # State machine.
+# if (self.lnk_event == "RESET"):
+# self.trn_state = "IDLE"
+# elif (self.trn_state == "IDLE"):
+# pass
+# elif (self.trn_state == "COMMAND"):
+# if (self.collect_data(8)):
+## self.put(self.lnk_fall, self.samplenum, self.out_proto, ['FUNCTION COMMAND', self.net_data])
+# self.put(self.lnk_fall, self.samplenum, self.out_ann, [ANN_NETWORK , ['FUNCTION COMMAND: 0x%02x' % self.net_data]])
+# self.put(self.lnk_fall, self.samplenum, self.out_ann, [ANN_TRANSPORT, ['FUNCTION COMMAND: 0x%02x' % self.net_data]])
+# if (self.net_data == 0x48):
+# # COPY SCRATCHPAD
+# self.trn_state = "TODO"
+# elif (self.net_data == 0x4e):
+# # WRITE SCRATCHPAD
+# self.trn_state = "TODO"
+# elif (self.net_data == 0xbe):
+# # READ SCRATCHPAD
+# self.trn_state = "TODO"
+# elif (self.net_data == 0xb8):
+# # RECALL E2
+# self.trn_state = "TODO"
+# elif (self.net_data == 0xb4):
+# # READ POWER SUPPLY
+# self.trn_state = "TODO"
+# else:
+# # unsupported commands
+# self.trn_state = "TODO"
+# elif (self.trn_state == "TODO"):
+# if (self.collect_data(8)):
+# self.put(self.lnk_fall, self.samplenum, self.out_ann, [ANN_NETWORK , ['TRANSPORT DATA: 0x%02x' % self.net_data]])
+# self.put(self.lnk_fall, self.samplenum, self.out_ann, [ANN_TRANSPORT, ['TRANSPORT DATA: 0x%02x' % self.net_data]])
+## self.put(self.lnk_fall, self.samplenum, self.out_ann, [ANN_NETWORK , ['TODO unsupported transport state: %s' % self.trn_state]])
+## self.put(self.lnk_fall, self.samplenum, self.out_ann, [ANN_TRANSPORT, ['TODO unsupported transport state: %s' % self.trn_state]])
+# pass
+# else:
+# raise Exception('Invalid trn_state: %s' % self.trn_state)
+
+
+#class onewire_device ():
+# def __init__ (self, scratchpad_size = 8):
+# pass
+# def reset (self):
+# pass
+# def data (self, data):
+# self.put(self.lnk_fall, self.samplenum, self.out_ann, [ANN_NETWORK , ['TRANSPORT DATA: 0x%02x' % self.net_data]])
+# self.put(self.lnk_fall, self.samplenum, self.out_ann, [ANN_TRANSPORT, ['TRANSPORT DATA: 0x%02x' % self.net_data]])