Feature/makefile add apps library (#218)

* add BACnet stack library at apps/lib

* convert apps to use apps/lib for smaller binary

* fix -DBACDL_ALL=1 build

* fix piface build

* datalink MAX_MPDU and MAX_HEADER cleanup

* add bip6 to git workflow

* fix system library dependency of BACnet library

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

ports/arduino_uno/bip.c

@@ -170,7 +170,7 @@ int bip_send_pdu(BACNET_ADDRESS *dest, /* destination address */
     unsigned pdu_len)
 { /* number of bytes of data */
 
-    uint8_t mtu[MAX_MPDU] = { 0 };
+    uint8_t mtu[BIP_MPDU_MAX] = { 0 };
     int mtu_len = 0;
     int bytes_sent = 0;
     /* addr and port in host format */

ports/arduino_uno/bip.h

@@ -31,8 +31,8 @@
 #include "bacnet/npdu.h"
 
 /* specific defines for BACnet/IP over Ethernet */
-#define MAX_HEADER (1 + 1 + 2)
-#define MAX_MPDU (MAX_HEADER+MAX_PDU)
+#define BIP_HEADER_MAX (1 + 1 + 2)
+#define BIP_MPDU_MAX (BIP_HEADER_MAX+MAX_PDU)
 
 #define BVLL_TYPE_BACNET_IP (0x81)
 

ports/arduino_uno/bvlc-arduino.c

@@ -80,7 +80,7 @@ static void bvlc_send_result(uint8_t *dest_addr,
 
     BACNET_BVLC_RESULT result_code)
 {
-    uint8_t mtu[MAX_MPDU] = { 0 };
+    uint8_t mtu[BIP_MPDU_MAX] = { 0 };
     uint16_t mtu_len = 0;
 
     mtu_len = (uint16_t)bvlc_encode_bvlc_result(&mtu[0], result_code);