RP and RPM Network Port indefinite object instance (#146)

* RP and RPM Network Port indefinite object instance

Added ReadProperty and ReadPropertyMultiple handling for
Network Port object indefinite object instance 4194303.

* Add network port object to some examples

* Fix stm32f10x build

* Fix Endian order of network port IP UDP port

* Add network port object to BDK Makefile

* Add network port object header to BDK device.c

* fix BDK and AT91SAM7S port builds

Co-authored-by: Steve Karg <skarg@users.sourceforge.net>

src/bacnet/basic/object/netport.c

@@ -40,6 +40,7 @@
 #include "bacnet/basic/binding/address.h"
 #include "bacnet/bacdef.h"
 #include "bacnet/bacapp.h"
+#include "bacnet/bacint.h"
 #include "bacnet/bacdcode.h"
 #include "bacnet/npdu.h"
 #include "bacnet/apdu.h"
@@ -599,7 +600,9 @@ bool Network_Port_MAC_Address(
             case PORT_TYPE_BIP:
                 memcpy(
                     &ip_mac[0], &Object_List[index].Network.IPv4.IP_Address, 4);
-                memcpy(&ip_mac[4], &Object_List[index].Network.IPv4.Port, 2);
+                /* convert port from host-byte-order to network-byte-order */
+                encode_unsigned16(&ip_mac[4],
+                    &Object_List[index].Network.IPv4.Port);
                 mac = &ip_mac[0];
                 mac_len = sizeof(ip_mac);
                 break;