diff --git a/bacnet-stack/ports/bdk-atxx4-mstp/Makefile b/bacnet-stack/ports/bdk-atxx4-mstp/Makefile
index b3aebc39..20014832 100644
--- a/bacnet-stack/ports/bdk-atxx4-mstp/Makefile
+++ b/bacnet-stack/ports/bdk-atxx4-mstp/Makefile
@@ -17,6 +17,7 @@ OBJDUMP = avr-objdump
 SIZE = avr-size
 AVRDUDE = avrdude
 LINT = splint
+LINT_MCU = __AVR_ATmega644p__
 
 SIZE_OPTIONS = -t
 #SIZE_OPTIONS = -C --mcu=${MCU}
@@ -188,6 +189,7 @@ CFLAGS += -fshort-enums
 # warnings
 CFLAGS += -Wall
 CFLAGS += -Wstrict-prototypes
+CFLAGS += -Wmissing-prototypes
 # put it all together
 CFLAGS += -gdwarf-2 $(BFLAGS) $(OPTIMIZATION)
 CFLAGS += -MD -MP -MT $(*F).o -MF dep/$(@F).d
@@ -319,7 +321,7 @@ size: ${TARGET_ELF}
 	@${SIZE} ${SIZE_OPTIONS} ${TARGET_ELF}
 
 lint:
-	$(LINT) $(BFLAGS) $(CSRC)
+	$(LINT) -exportlocal -D$(LINT_MCU) $(BFLAGS) $(CSRC)
 
 install: $(TARGET_ELF)
 	$(AVRDUDE) $(AVRDUDE_FLAGS) $(AVRDUDE_INSTALL)
diff --git a/bacnet-stack/ports/bdk-atxx4-mstp/adc.c b/bacnet-stack/ports/bdk-atxx4-mstp/adc.c
index 658ef8f1..8120e192 100644
--- a/bacnet-stack/ports/bdk-atxx4-mstp/adc.c
+++ b/bacnet-stack/ports/bdk-atxx4-mstp/adc.c
@@ -24,6 +24,8 @@
 #include <stdbool.h>
 #include <stdint.h>
 #include "hardware.h"
+/* me */
+#include "adc.h"
 
 /* prescale select bits */
 #if   (F_CPU >> 1) < 1000000
@@ -73,8 +75,8 @@ void adc_init(
     /*  ADEN = Enable
        ADSC = Start conversion
        ADIF = Interrupt Flag
-       ADIE = Interrupt Enable    
-       ADATE = Auto Trigger Enable    
+       ADIE = Interrupt Enable
+       ADATE = Auto Trigger Enable
      */
     ADCSRA |= (1 << ADEN) | (1 << ADIE) | (1 << ADIF) | (1 << ADATE);
     /* trigger selection bits
@@ -85,7 +87,7 @@ void adc_init(
        1 0 0 Timer/Counter0 Overflow
        1 0 1 Timer/Counter1 Compare Match B
        1 1 0 Timer/Counter1 Overflow
-       1 1 1 Timer/Counter1 Capture Event        
+       1 1 1 Timer/Counter1 Capture Event
      */
     ADCSRB |= (0 << ADTS2) | (0 << ADTS1) | (0 << ADTS0);
     /* start the conversions */
diff --git a/bacnet-stack/ports/bdk-atxx4-mstp/bacnet.c b/bacnet-stack/ports/bdk-atxx4-mstp/bacnet.c
index c5218b3f..45227aaa 100644
--- a/bacnet-stack/ports/bdk-atxx4-mstp/bacnet.c
+++ b/bacnet-stack/ports/bdk-atxx4-mstp/bacnet.c
@@ -45,6 +45,8 @@
 #include "av.h"
 #include "bi.h"
 #include "bo.h"
+/* me */
+#include "bacnet.h"
 
 /* MAC Address of MS/TP */
 static uint8_t MSTP_MAC_Address;
diff --git a/bacnet-stack/ports/bdk-atxx4-mstp/bo.c b/bacnet-stack/ports/bdk-atxx4-mstp/bo.c
index c7f936b6..c02c1ddc 100644
--- a/bacnet-stack/ports/bdk-atxx4-mstp/bo.c
+++ b/bacnet-stack/ports/bdk-atxx4-mstp/bo.c
@@ -218,7 +218,7 @@ bool Binary_Output_Present_Value_Set(
     return status;
 }
 
-void Binary_Output_Polarity_Set(
+static void Binary_Output_Polarity_Set(
     uint32_t instance,
     BACNET_POLARITY polarity)
 {
@@ -231,7 +231,7 @@ void Binary_Output_Polarity_Set(
     }
 }
 
-void Binary_Output_Out_Of_Service_Set(
+static void Binary_Output_Out_Of_Service_Set(
     uint32_t instance,
     bool flag)
 {
diff --git a/bacnet-stack/ports/bdk-atxx4-mstp/dlmstp.c b/bacnet-stack/ports/bdk-atxx4-mstp/dlmstp.c
index 8159637d..cdab7b2f 100644
--- a/bacnet-stack/ports/bdk-atxx4-mstp/dlmstp.c
+++ b/bacnet-stack/ports/bdk-atxx4-mstp/dlmstp.c
@@ -1348,6 +1348,7 @@ void dlmstp_get_broadcast_address(
     return;
 }
 
+#ifdef TEST_MSTP_STATE_TEXT
 char *dlmstp_receive_state_text(
     void)
 {
@@ -1366,7 +1367,9 @@ char *dlmstp_receive_state_text(
 
     return "unknown";
 }
+#endif
 
+#ifdef TEST_MSTP_STATE_TEXT
 char *dlmstp_master_state_text(
     void)
 {
@@ -1395,3 +1398,4 @@ char *dlmstp_master_state_text(
 
     return "unknown";
 }
+#endif
\ No newline at end of file
diff --git a/bacnet-stack/ports/bdk-atxx4-mstp/init.c b/bacnet-stack/ports/bdk-atxx4-mstp/init.c
index afd80ba3..f1f8bd22 100644
--- a/bacnet-stack/ports/bdk-atxx4-mstp/init.c
+++ b/bacnet-stack/ports/bdk-atxx4-mstp/init.c
@@ -23,6 +23,8 @@
 *
 *********************************************************************/
 #include "hardware.h"
+/* me */
+#include "init.h"
 
 void init(
     void)
diff --git a/bacnet-stack/ports/bdk-atxx4-mstp/input.c b/bacnet-stack/ports/bdk-atxx4-mstp/input.c
index 82ed682f..a795b65e 100644
--- a/bacnet-stack/ports/bdk-atxx4-mstp/input.c
+++ b/bacnet-stack/ports/bdk-atxx4-mstp/input.c
@@ -26,6 +26,8 @@
 #include <stdbool.h>
 #include "hardware.h"
 #include "timer.h"
+/* me */
+#include "input.h"
 
 static uint8_t Address_Switch;
 static uint8_t Buttons;
diff --git a/bacnet-stack/ports/bdk-atxx4-mstp/rs485.c b/bacnet-stack/ports/bdk-atxx4-mstp/rs485.c
index c5e15423..44032e76 100644
--- a/bacnet-stack/ports/bdk-atxx4-mstp/rs485.c
+++ b/bacnet-stack/ports/bdk-atxx4-mstp/rs485.c
@@ -29,6 +29,8 @@
 #include "timer.h"
 #include "led.h"
 #include "nvdata.h"
+/* me */
+#include "rs485.h"
 
 /* baud rate */
 static uint32_t Baud_Rate = 9600;
diff --git a/bacnet-stack/ports/bdk-atxx4-mstp/seeprom.c b/bacnet-stack/ports/bdk-atxx4-mstp/seeprom.c
index e623f035..ea33e032 100644
--- a/bacnet-stack/ports/bdk-atxx4-mstp/seeprom.c
+++ b/bacnet-stack/ports/bdk-atxx4-mstp/seeprom.c
@@ -25,6 +25,7 @@
 #include <stdint.h>
 #include <stdlib.h>
 #include "hardware.h"
+/* me */
 #include "seeprom.h"
 
 /* the SEEPROM chip select bits A2, A1, and A0 are grounded */
@@ -276,7 +277,7 @@ int seeprom_bytes_read(
 * RETURN: number of bytes written, or -1 on error
 * NOTES: only writes from offset to end of page.
 **************************************************************************/
-int seeprom_bytes_write_page(
+static int seeprom_bytes_write_page(
     uint16_t eeaddr,    /* SEEPROM starting memory address */
     uint8_t * buf,      /* data to send */
     int len)
@@ -413,14 +414,14 @@ int seeprom_bytes_write_page(
 /*************************************************************************
 * DESCRIPTION: Write some data and wait until it is sent
 * RETURN: number of bytes written, or -1 on error
-* NOTES: 
-*   When the word address, internally generated, 
+* NOTES:
+*   When the word address, internally generated,
 *   reaches the page boundary, the following
-*   byte is placed at the beginning of the same 
+*   byte is placed at the beginning of the same
 *   page. If more than 64 data words are
-*   transmitted to the EEPROM, the data word 
+*   transmitted to the EEPROM, the data word
 *   address will “roll over” and previous data will be
-*   overwritten. The address “roll over” during write 
+*   overwritten. The address “roll over” during write
 *   is from the last byte of the current page to the
 *   first byte of the same page.
 **************************************************************************/
diff --git a/bacnet-stack/ports/bdk-atxx4-mstp/stack.c b/bacnet-stack/ports/bdk-atxx4-mstp/stack.c
index e5108463..29c247b5 100644
--- a/bacnet-stack/ports/bdk-atxx4-mstp/stack.c
+++ b/bacnet-stack/ports/bdk-atxx4-mstp/stack.c
@@ -23,6 +23,8 @@
 *
 *********************************************************************/
 #include "hardware.h"
+/* me */
+#include "stack.h"
 
 /* stack checking */
 extern uint8_t _end;
diff --git a/bacnet-stack/ports/bdk-atxx4-mstp/test.c b/bacnet-stack/ports/bdk-atxx4-mstp/test.c
index c908259a..b8232dde 100644
--- a/bacnet-stack/ports/bdk-atxx4-mstp/test.c
+++ b/bacnet-stack/ports/bdk-atxx4-mstp/test.c
@@ -30,6 +30,8 @@
 #include "serial.h"
 #include "input.h"
 #include "bo.h"
+/* me */
+#include "test.h"
 
 /* timer for test task */
 static struct itimer Test_Timer;