Feature/port arm build check (#34)

* add GCC ARM compiler to travis pre-script and add some ARM ports to job

.travis.yml

@@ -1,5 +1,13 @@
 language: c
 
+dist: xenial
+
+before_install:
+  - sudo apt-get update
+  - sudo apt-get -y install build-essential
+  - sudo apt-get -y install gcc-arm-none-eabi
+  - sudo apt-get -y install libnewlib-arm-none-eabi
+
 compiler:
   - gcc
   - clang
@@ -23,4 +31,10 @@ jobs:
       compiler: clang
       # script: scan-build --status-bugs -analyze-headers -v make -j2 clean server
       script: skip
-
+    - stage: ports-arm
+      os: linux
+      before_script:
+        - arm-none-eabi-gcc --version
+      script:
+        - make stm32f10x
+        - make at91sam7s

Makefile

@@ -88,11 +88,11 @@ atmega168: ports/atmega168/Makefile
 
 .PHONY: at91sam7s
 at91sam7s: ports/at91sam7s/Makefile
-	$(MAKE) -s -C ports/at91sam7s clean all
+	$(MAKE) -C ports/at91sam7s clean all
 
 .PHONY: stm32f10x
 stm32f10x: ports/stm32f10x/Makefile
-	$(MAKE) -s -C ports/stm32f10x clean all
+	$(MAKE) -C ports/stm32f10x clean all
 
 .PHONY: mstpsnap
 mstpsnap: ports/linux/mstpsnap.mak

ports/at91sam7s/Makefile

@@ -24,13 +24,10 @@ BACNET_FLAGS += -DMAX_APDU=480
 BACNET_FLAGS += -DCRC_USE_TABLE
 #BACNET_FLAGS += -DDLMSTP_TEST
 
-BACNET_CORE = ../../src
+BACNET_SRC = ../../src
+BACNET_CORE = $(BACNET_SRC)/bacnet
 BACNET_BASIC = $(BACNET_CORE)/basic
-BACNET_INCLUDE = $(BACNET_CORE)
-INCLUDES = -I.
-INCLUDES += -I$(BACNET_INCLUDE)
-INCLUDES += -I$(BACNET_OBJECT)
-INCLUDES += -I$(BACNET_HANDLER)
+INCLUDES = -I. -I$(BACNET_SRC)
 #OPTIMIZATION = -O0
 OPTIMIZATION = -Os
 CFLAGS = -fno-common $(INCLUDES) $(BACNET_FLAGS) -Wall -g
@@ -100,7 +97,6 @@ CORESRC = $(BACNET_CORE)/abort.c \
 	$(BACNET_CORE)/reject.c \
 	$(BACNET_CORE)/rp.c \
 	$(BACNET_CORE)/rpm.c \
-	$(BACNET_CORE)/version.c \
 	$(BACNET_CORE)/whohas.c \
 	$(BACNET_CORE)/whois.c \
 	$(BACNET_CORE)/wp.c

ports/at91sam7s/rs485.c

@@ -32,7 +32,7 @@
 #include <stdbool.h>
 #include <stdlib.h>
 #include <stdio.h>
-#include "bacnet/basic/sys/mstimer.h"
+#include "timer.h"
 
 /* This file has been customized for use with UART0
    on the AT91SAM7S-EK */

ports/at91sam7s/timer.c

@@ -43,6 +43,7 @@
 #include <stdint.h>
 #include "board.h"
 #include "bacnet/datalink/dlmstp.h"
+#include "timer.h"
 
 /* global variable counts interrupts */
 volatile unsigned long Timer_Milliseconds;
@@ -309,8 +310,10 @@ static void Timer0IrqHandler(
     dummy = pTC->TC_SR;
     /* increment the tick count */
     Timer_Milliseconds++;
-    if (SilenceTime < 60000)
+    if (SilenceTime < 60000) {
         SilenceTime++;
+    }
+    (void)dummy;
 }
 
 int Timer_Silence(