| (1) Set RF channel = CHANNEL0 |
| (2) while (1) |
| (3) Check RF channel |
| (4) if RF channel is not available |
| (5) If RF channel == MAX_RF_CHANNEL |
| (6) Halt application. |
| (7) else |
| (8) RF channel +1; |
| (9) continue; |
| (10) else |
| (11) break; |
| (12) while (1) |
| (13) Sleep; |
| (14) Wake up for RF packet receiving or system event |
| (15) if time == T_SENDING_SYNC // time for sending synchronization |
| (16) Send POLL(ALL_NODES); |
| (17) else if received RF packet |
| (18) Unpack the packet, extract source address NODEA; |
| (19) If packet type == ACK_POLL |
| (20) if the node is synchronized |
| (21) TOUT_NODE = 0; // clear timeout counter of the node |
| (22) else if packet type == ACK_POLL_DATA |
| (23) if the node is synchronized |
| (24) TOUT_NODE = 0; |
| (25) Send DATA_REVED(NODEA); |
| (26) else if packet type == APPLY |
| (27) if node-list is not full |
| (28) Assign a node number; |
| (29) Update node-list; |
| (30) Send ACK_APL(NODEA); |
| (31) else |
| (32) Send DENY(NODEA); |
| (33) else if packet type == JOIN |
| (34) if node is synchronized |
| (35) Update node-list; // node has joined the network by now. |
| (36) Send ACP_JOIN(NODEA) |
| (37) else |
| (38) Send ACK_ JOIN (NODEA); |
| (39) else if packet type == QueryPCP or QueryP2P // voice communication inquiry |
| (40) extract distinct address NODEB |
| (41) If free audio channel >0 |
| (42) if (NODEB == CNODE) |
| (43) Send ACPPCP(NODEA); |
| (44) Start codec; |
| (45) Allocate audio channel; |
| (46) Start voice communication; |
| (47) else if… // more voice communication details, please browse the appendix. |
| (48) …; |
| (49) else |
| (50) Send DENY(NODEA); |
| (51) else if packet type == Audio data |
| (52) …Packet processing; // please browse the appendix. |
| (53) else if KEY pressed |
| (54) Response to KEY press; |
| (55) else if time == T_CHECK_NODE // check nodes status |
| (56) for each node in node-list |
| (57) If TOUT_NODE > TOUTMAX |
| (58) Delete the node; |
| (59) else |
| (60) …; |
