public override void Execute()
{
try
{
_apm.MessageLog("Executing " + diagnosticName);
ClearIncomingPacketQueue();
// find a non-existing network number in the whole attached BACnet internetwork by examining our internal router table that
// has been built up during device discovery phase
int useThisNetworkNumber = 9;
for (int i = 0xfffe; i > 1; i--)
{
if (_apm.internalRouterInfo.FindRoutingTableEntry(i) == null)
{
// we have not seen or used this network number yet
useThisNetworkNumber = i;
break;
}
}
// BACnetUtil.SendReadProperty(_apm, _bnm, deviceNode.device, deviceNode.device.deviceObjectID, BACnetEnums.BACNET_PROPERTY_ID.PROP_OBJECT_TYPE);
BACnetPacket pkt = new BACnetPacket(_apm);
// pkt.EncodeBVLL(new DADR(deviceNode.device.adr), BACnetEnums.BACNET_BVLC_FUNCTION.BVLC_ORIGINAL_UNICAST_NPDU);
pkt.EncodeNPCI(new DADR(devicTreeNode.device.adr), new ADR((ushort)useThisNetworkNumber, (uint)3), BACnetLibrary.BACnetPacket.MESSAGE_TYPE.APPLICATION);
// todonow, put these next steps into functions
// build confirmed request header
// http://www.bacnetwiki.com/wiki/index.php?title=BACnet-Confirmed-Request-PDU
pkt.buffer[pkt.optr++] = (Byte)BACnetEnums.BACNET_PDU_TYPE.PDU_TYPE_CONFIRMED_SERVICE_REQUEST;
pkt.buffer[pkt.optr++] = 0x05; // max segs, max resp. todo
pkt.buffer[pkt.optr++] = _apm.invokeID++;
// sequence number may come next, dep on flags. todo
pkt.buffer[pkt.optr++] = (byte)BACnetEnums.BACNET_CONFIRMED_SERVICE.SERVICE_CONFIRMED_READ_PROPERTY;
// context encoding
// http://www.bacnetwiki.com/wiki/index.php?title=Read_Property
devicTreeNode.device.deviceObjectID.Encode(pkt.buffer, ref pkt.optr);
BACnetUtil.EncodeContextTag(pkt.buffer, ref pkt.optr, 1, (int)BACnetEnums.BACNET_PROPERTY_ID.PROP_OBJECT_TYPE);
BACnetUtil.SendOffPacket(_apm, _bnm, pkt, pkt.buffer, pkt.optr);
BACnetPacket respPkt = waitForPacket(5000);
}
catch (TimeoutException)
{
// todo-put a wrapper around execute and catch all executions in a common area..
MarkDiagnosticFailed("Timeout");
return;
}
catch (Exception ex)
{
// other types of exception...
throw ex;
}
MarkDiagnosticSuccess();
}
