Added extra sub-state for MS/TP from Addendum 135-2008v. Tested with ports/bdk-atxx4-mstp/ code on the BACnet Development Kit. Clean compile on src/mstp.c, ports/at91sam7s and ports/atmega168, but untested. All other changes were not compiled or tested.

2010-10-07 15:52:45 +00:00
parent 23eecbc100
commit b54218939e
7 changed files with 99 additions and 23 deletions
@@ -783,6 +783,17 @@ static bool MSTP_Master_Node_FSM(
                /* before passing the token.  */
                Master_State = MSTP_MASTER_STATE_USE_TOKEN;
                transition_now = true;
+            } else if ((MSTP_Flag.SoleMaster == false) &&
+                (Next_Station == This_Station)) {
+                /* NextStationUnknown - added in Addendum 135-2008v-1 */
+                /*  then the next station to which the token
+                    should be sent is unknown - so PollForMaster */
+                Poll_Station = next_this_station;
+                MSTP_Send_Frame(
+                    FRAME_TYPE_POLL_FOR_MASTER, Poll_Station,
+                    This_Station, NULL, 0);
+                RetryCount = 0;
+                Master_State = MSTP_MASTER_STATE_POLL_FOR_MASTER;
            }
            /* Npoll changed in Errata SSPC-135-2004 */
            else if (TokenCount < (Npoll - 1)) {