diff --git a/bacnet-stack/cov.c b/bacnet-stack/cov.c
index cfe0f3d4..4ccbe59d 100644
--- a/bacnet-stack/cov.c
+++ b/bacnet-stack/cov.c
@@ -716,17 +716,24 @@ void npdu_encode_npdu_data(BACNET_NPDU_DATA * npdu,
 }
 
 /* dummy function stubs */
-int datalink_send_pdu(BACNET_ADDRESS * dest,    /* destination address */
-    BACNET_NPDU_DATA * npdu_data,       /* network information */
-    uint8_t * pdu,              /* any data to be sent - may be null */
+int datalink_send_pdu(
+    BACNET_ADDRESS * dest,
+    BACNET_NPDU_DATA * npdu_data,
+    uint8_t * pdu,
     unsigned pdu_len)
-{                               /* number of bytes of data */
+{   
+    (void) dest;
+    (void) npdu_data;
+    (void) pdu;
+    (void) pdu_len;
+
     return 0;
 }
 
 /* dummy function stubs */
 void datalink_get_broadcast_address(BACNET_ADDRESS * dest)
 {
+  (void)dest;
 }
 
 /* dummy function stubs */
diff --git a/bacnet-stack/cov.mak b/bacnet-stack/cov.mak
index adab2c62..2d5b9069 100644
--- a/bacnet-stack/cov.mak
+++ b/bacnet-stack/cov.mak
@@ -4,7 +4,7 @@ BASEDIR = .
 #CFLAGS  = -Wall -I.
 # -g for debugging with gdb
 #CFLAGS  = -Wall -I. -g
-CFLAGS  = -Wall -I. -Itest -Idemo/object -DTEST -DTEST_COV -g
+CFLAGS  = -Wall -I. -Itest -Idemo/object -DTEST -DTEST_COV -DBACDL_TEST=1 -DBIG_ENDIAN=0 -g
 
 SRCS = bacdcode.c \
        bacstr.c \
diff --git a/bacnet-stack/datalink.h b/bacnet-stack/datalink.h
index 11a682ac..7515a19c 100644
--- a/bacnet-stack/datalink.h
+++ b/bacnet-stack/datalink.h
@@ -70,6 +70,23 @@
 #define datalink_get_broadcast_address bip_get_broadcast_address
 #define datalink_get_my_address bip_get_my_address
 
+#elif defined(BACDL_TEST)
+#include "npdu.h"
+
+    extern int datalink_send_pdu(
+        BACNET_ADDRESS * dest,
+        BACNET_NPDU_DATA * npdu_data,
+        uint8_t * pdu,
+        unsigned pdu_len);
+    extern uint16_t datalink_receive(
+        BACNET_ADDRESS * src,
+        uint8_t * pdu,
+        uint16_t max_pdu,
+        unsigned timeout);
+    extern void datalink_cleanup(void);
+    extern void datalink_get_broadcast_address(BACNET_ADDRESS * dest);
+    extern void bip_get_my_address(BACNET_ADDRESS * my_address);
+
 #endif
 
 #endif
diff --git a/bacnet-stack/iam.c b/bacnet-stack/iam.c
index 9caec26b..f9ed4923 100755
--- a/bacnet-stack/iam.c
+++ b/bacnet-stack/iam.c
@@ -217,23 +217,26 @@ void testIAm(Test * pTest)
 }
 
 #ifdef TEST_IAM
-/* Dummy stubs to eliminate depencies */
+/* dummy function stubs */
+int datalink_send_pdu(
+    BACNET_ADDRESS * dest,
+    BACNET_NPDU_DATA * npdu_data,
+    uint8_t * pdu,
+    unsigned pdu_len)
+{   
+    (void) dest;
+    (void) npdu_data;
+    (void) pdu;
+    (void) pdu_len;
+
+    return 0;
+}
+
 void datalink_get_broadcast_address(BACNET_ADDRESS * dest)
 {                               /* destination address */
     (void) dest;
 }
 
-int datalink_send_pdu(BACNET_ADDRESS * dest,    /* destination address */
-    BACNET_NPDU_DATA * npdu_data,       /* network information */
-    uint8_t * pdu,              /* any data to be sent - may be null */
-    unsigned pdu_len)
-{                               /* number of bytes of data */
-    (void) dest;
-    (void) pdu;
-
-    return pdu_len;
-}
-
 uint16_t Device_Vendor_Identifier(void)
 {
     return 0;
diff --git a/bacnet-stack/iam.mak b/bacnet-stack/iam.mak
index 4afea483..55a783f6 100755
--- a/bacnet-stack/iam.mak
+++ b/bacnet-stack/iam.mak
@@ -2,7 +2,7 @@
 CC      = gcc
 BASEDIR = .
 # -g for debugging with gdb
-DEFINES = -DBACFILE=1 -DTEST -DTEST_IAM
+DEFINES = -DBACFILE=1 -DTEST -DTEST_IAM -DBACDL_TEST -DBIG_ENDIAN=0
 INCLUDES = -I. -Idemo/object -Itest 
 CFLAGS  = -Wall $(INCLUDES) $(DEFINES) -g
 
diff --git a/bacnet-stack/tsm.c b/bacnet-stack/tsm.c
index 4a80862a..103dded5 100644
--- a/bacnet-stack/tsm.c
+++ b/bacnet-stack/tsm.c
@@ -297,6 +297,27 @@ bool tsm_invoke_id_failed(uint8_t invokeID)
 /* flag to send an I-Am */
 bool I_Am_Request = true;
 
+/* dummy function stubs */
+int datalink_send_pdu(
+    BACNET_ADDRESS * dest,
+    BACNET_NPDU_DATA * npdu_data,
+    uint8_t * pdu,
+    unsigned pdu_len)
+{   
+    (void) dest;
+    (void) npdu_data;
+    (void) pdu;
+    (void) pdu_len;
+
+    return 0;
+}
+
+/* dummy function stubs */
+void datalink_get_broadcast_address(BACNET_ADDRESS * dest)
+{
+  (void)dest;
+}
+
 void testTSM(Test * pTest)
 {
     /* FIXME: add some unit testing... */
diff --git a/bacnet-stack/tsm.mak b/bacnet-stack/tsm.mak
index 754f52ec..398fb1f4 100644
--- a/bacnet-stack/tsm.mak
+++ b/bacnet-stack/tsm.mak
@@ -1,7 +1,7 @@
 #Makefile to build test case
 CC      = gcc
 # -g for debugging with gdb
-DEFINES = -DTSM_ENABLED=1 -DTEST -DTEST_TSM
+DEFINES = -DTSM_ENABLED=1 -DTEST -DTEST_TSM -DBIG_ENDIAN=0 -DBACDL_TEST=1
 INCLUDES = -I. -Idemo/object -Idemo/handler -Itest -Iports/linux
 CFLAGS  = -Wall $(INCLUDES) $(DEFINES) -g
 
@@ -21,11 +21,11 @@ SRCS = address.c \
        demo/object/bv.c \
        demo/object/lsp.c \
        demo/object/mso.c \
+       demo/object/lc.c \
        iam.c \
        dcc.c \
        npdu.c \
        apdu.c \
-       datalink.c \
        tsm.c \
        test/ctest.c