diff --git a/bacnet-stack/demo/object/av.c b/bacnet-stack/demo/object/av.c
index 665a32d8..78efbf1a 100644
--- a/bacnet-stack/demo/object/av.c
+++ b/bacnet-stack/demo/object/av.c
@@ -34,8 +34,7 @@
 #include "bacapp.h"
 #include "config.h"     /* the custom stuff */
 #include "wp.h"
-
-#define MAX_ANALOG_VALUES 4
+#include "av.h"
 
 /* we choose to have a NULL level in our system represented by */
 /* a particular value.  When the priorities are not in use, they */
diff --git a/bacnet-stack/include/av.h b/bacnet-stack/include/av.h
index d271366a..1b99117e 100644
--- a/bacnet-stack/include/av.h
+++ b/bacnet-stack/include/av.h
@@ -31,6 +31,10 @@
 #include "bacerror.h"
 #include "wp.h"
 
+#ifndef MAX_ANALOG_VALUES
+#define MAX_ANALOG_VALUES 4
+#endif
+
 #ifdef __cplusplus
 extern "C" {
 #endif /* __cplusplus */
diff --git a/bacnet-stack/ports/atmega168/av.c b/bacnet-stack/ports/atmega168/av.c
index 78b09296..6026382a 100644
--- a/bacnet-stack/ports/atmega168/av.c
+++ b/bacnet-stack/ports/atmega168/av.c
@@ -33,6 +33,7 @@
 #include "bacapp.h"
 #include "config.h"     /* the custom stuff */
 #include "wp.h"
+#include "av.h"
 
 #if (MAX_ANALOG_VALUES > 10)
 #error Modify the Analog_Value_Name to handle multiple digits
diff --git a/bacnet-stack/ports/atmega168/bacnet.ewp b/bacnet-stack/ports/atmega168/bacnet.ewp
index c569fa46..606ee98e 100644
--- a/bacnet-stack/ports/atmega168/bacnet.ewp
+++ b/bacnet-stack/ports/atmega168/bacnet.ewp
@@ -10,9 +10,9 @@
     <debug>1</debug>
     <settings>
       <name>General</name>
-      <archiveVersion>3</archiveVersion>
+      <archiveVersion>5</archiveVersion>
       <data>
-        <version>6</version>
+        <version>7</version>
         <wantNonLocal>1</wantNonLocal>
         <debug>1</debug>
         <option>
@@ -63,7 +63,7 @@
         </option>
         <option>
           <name>SCCStackSize</name>
-          <state>0x20</state>
+          <state>0xff</state>
         </option>
         <option>
           <name>SCExtCStack</name>
@@ -71,7 +71,7 @@
         </option>
         <option>
           <name>SCRStackSize</name>
-          <state>16</state>
+          <state>32</state>
         </option>
         <option>
           <name>SCExtRStack</name>
@@ -127,8 +127,8 @@
         </option>
         <option>
           <name>New Variant Processor</name>
-          <version>15</version>
-          <state>41</state>
+          <version>24</version>
+          <state>45</state>
         </option>
         <option>
           <name>GRuntimeLibSelect</name>
@@ -145,11 +145,11 @@
         </option>
         <option>
           <name>RTConfigPath</name>
-          <state>$TOOLKIT_DIR$\LIB\DLIB\dlAVR-3s-ec-sf-n.h</state>
+          <state>$TOOLKIT_DIR$\LIB\DLIB\dlAVR-3s-ec_mul-sf-n.h</state>
         </option>
         <option>
           <name>RTLibraryPath</name>
-          <state>$TOOLKIT_DIR$\LIB\DLIB\dlAVR-3s-ec-sf-n.r90</state>
+          <state>$TOOLKIT_DIR$\LIB\DLIB\dlAVR-3s-ec_mul-sf-n.r90</state>
         </option>
         <option>
           <name>Input variant</name>
@@ -207,13 +207,17 @@
           <name>LCsHeapConfigText</name>
           <state>1</state>
         </option>
+        <option>
+          <name>GGNoMULInstruction</name>
+          <state>0</state>
+        </option>
       </data>
     </settings>
     <settings>
       <name>ICCAVR</name>
-      <archiveVersion>3</archiveVersion>
+      <archiveVersion>4</archiveVersion>
       <data>
-        <version>12</version>
+        <version>13</version>
         <wantNonLocal>1</wantNonLocal>
         <debug>1</debug>
         <option>
@@ -468,13 +472,17 @@
           <name>CCRadioModuleTypeSlave</name>
           <state>1</state>
         </option>
+        <option>
+          <name>OCCAdditionalCommandLineOptionsSlave</name>
+          <state>0</state>
+        </option>
       </data>
     </settings>
     <settings>
       <name>AAVR</name>
-      <archiveVersion>3</archiveVersion>
+      <archiveVersion>4</archiveVersion>
       <data>
-        <version>9</version>
+        <version>10</version>
         <wantNonLocal>1</wantNonLocal>
         <debug>1</debug>
         <option>
@@ -650,18 +658,6 @@
           <name>AsmOutputFile</name>
           <state>$FILE_BNAME$.r90</state>
         </option>
-        <option>
-          <name>AOverrideModuleTypeDefault</name>
-          <state>0</state>
-        </option>
-        <option>
-          <name>ARadioModuleType</name>
-          <state>0</state>
-        </option>
-        <option>
-          <name>ARadioModuleTypeSlave</name>
-          <state>1</state>
-        </option>
       </data>
     </settings>
     <settings>
@@ -707,7 +703,7 @@
         </option>
         <option>
           <name>FormatVariant</name>
-          <version>7</version>
+          <version>8</version>
           <state>2</state>
         </option>
         <option>
@@ -856,7 +852,7 @@
         </option>
         <option>
           <name>DebugInformation</name>
-          <state>1</state>
+          <state>0</state>
         </option>
         <option>
           <name>RuntimeControl</name>
@@ -868,7 +864,7 @@
         </option>
         <option>
           <name>AllowExtraOutput</name>
-          <state>0</state>
+          <state>1</state>
         </option>
         <option>
           <name>GenerateExtraOutput</name>
@@ -889,7 +885,7 @@
         </option>
         <option>
           <name>ExtraFormatVariant</name>
-          <version>7</version>
+          <version>8</version>
           <state>2</state>
         </option>
         <option>
@@ -985,9 +981,9 @@
     <debug>0</debug>
     <settings>
       <name>General</name>
-      <archiveVersion>3</archiveVersion>
+      <archiveVersion>5</archiveVersion>
       <data>
-        <version>6</version>
+        <version>7</version>
         <wantNonLocal>1</wantNonLocal>
         <debug>0</debug>
         <option>
@@ -1102,7 +1098,7 @@
         </option>
         <option>
           <name>New Variant Processor</name>
-          <version>15</version>
+          <version>24</version>
           <state>0</state>
         </option>
         <option>
@@ -1178,13 +1174,17 @@
           <name>LCsHeapConfigText</name>
           <state>1</state>
         </option>
+        <option>
+          <name>GGNoMULInstruction</name>
+          <state>0</state>
+        </option>
       </data>
     </settings>
     <settings>
       <name>ICCAVR</name>
-      <archiveVersion>3</archiveVersion>
+      <archiveVersion>4</archiveVersion>
       <data>
-        <version>12</version>
+        <version>13</version>
         <wantNonLocal>1</wantNonLocal>
         <debug>0</debug>
         <option>
@@ -1434,13 +1434,17 @@
           <name>CCRadioModuleTypeSlave</name>
           <state>1</state>
         </option>
+        <option>
+          <name>OCCAdditionalCommandLineOptionsSlave</name>
+          <state>0</state>
+        </option>
       </data>
     </settings>
     <settings>
       <name>AAVR</name>
-      <archiveVersion>3</archiveVersion>
+      <archiveVersion>4</archiveVersion>
       <data>
-        <version>9</version>
+        <version>10</version>
         <wantNonLocal>1</wantNonLocal>
         <debug>0</debug>
         <option>
@@ -1616,18 +1620,6 @@
           <name>AsmOutputFile</name>
           <state></state>
         </option>
-        <option>
-          <name>AOverrideModuleTypeDefault</name>
-          <state>0</state>
-        </option>
-        <option>
-          <name>ARadioModuleType</name>
-          <state>0</state>
-        </option>
-        <option>
-          <name>ARadioModuleTypeSlave</name>
-          <state>1</state>
-        </option>
       </data>
     </settings>
     <settings>
@@ -1673,7 +1665,7 @@
         </option>
         <option>
           <name>FormatVariant</name>
-          <version>7</version>
+          <version>8</version>
           <state>2</state>
         </option>
         <option>
@@ -1857,7 +1849,7 @@
         </option>
         <option>
           <name>ExtraFormatVariant</name>
-          <version>7</version>
+          <version>8</version>
           <state>2</state>
         </option>
         <option>
@@ -2026,9 +2018,6 @@
   <file>
     <name>$PROJ_DIR$\..\..\demo\handler\txbuf.c</name>
   </file>
-  <file>
-    <name>$PROJ_DIR$\..\..\src\version.c</name>
-  </file>
   <file>
     <name>$PROJ_DIR$\..\..\src\whois.c</name>
   </file>
diff --git a/bacnet-stack/ports/atmega168/hardware.h b/bacnet-stack/ports/atmega168/hardware.h
index e096ec22..c04c9199 100644
--- a/bacnet-stack/ports/atmega168/hardware.h
+++ b/bacnet-stack/ports/atmega168/hardware.h
@@ -27,7 +27,7 @@
 
 #if !defined(F_CPU)
     /* The processor clock frequency */
-#define F_CPU (7372800)
+#define F_CPU 7372800UL
 #endif
 
 #if defined(__IAR_SYSTEMS_ICC__) || defined(__IAR_SYSTEMS_ASM__)
diff --git a/bacnet-stack/ports/atmega168/iar2gcc.h b/bacnet-stack/ports/atmega168/iar2gcc.h
index 7afbfd41..03dcb8ce 100644
--- a/bacnet-stack/ports/atmega168/iar2gcc.h
+++ b/bacnet-stack/ports/atmega168/iar2gcc.h
@@ -34,25 +34,26 @@
 #ifndef IAR2GCC_H
 #define IAR2GCC_H
 
+#if !defined(F_CPU)
+#define F_CPU (7372800)
+#endif
+
 #if defined(__IAR_SYSTEMS_ICC__) || defined(__IAR_SYSTEMS_ASM__)
 #include <inavr.h>
 #include <ioavr.h>
 #define _BV(bit_num) (1 << (bit_num))
-#define _delay_us(x) \
 
 /* inline function */
-static inline void delay_us(
+static inline void _delay_us(
     uint8_t microseconds)
 {
     do {
-        __delay_cycles(F_CPU / 1000000);
+        __delay_cycles(F_CPU / 1000000UL);
     } while (microseconds--);
 }
 
 #else
-#if !defined(F_CPU)
-#define F_CPU (7372800)
-#endif
+/* GCC */
 #include <avr/io.h>
 #include <avr/interrupt.h>
 #include <util/delay.h>
diff --git a/bacnet-stack/ports/atmega168/main.c b/bacnet-stack/ports/atmega168/main.c
index 41599fdf..bc0febf6 100644
--- a/bacnet-stack/ports/atmega168/main.c
+++ b/bacnet-stack/ports/atmega168/main.c
@@ -33,6 +33,7 @@
 #include "txbuf.h"
 #include "iam.h"
 #include "device.h"
+#include "av.h"
 
 const char *BACnet_Version = "1.0";
 
diff --git a/bacnet-stack/ports/atmega168/rs485.c b/bacnet-stack/ports/atmega168/rs485.c
index 2d4ea2b3..5946ff15 100644
--- a/bacnet-stack/ports/atmega168/rs485.c
+++ b/bacnet-stack/ports/atmega168/rs485.c
@@ -56,13 +56,6 @@ static uint32_t RS485_Baud = 9600;
 #define Tturnaround  (40UL)
 /* turnaround_time_milliseconds = (Tturnaround*1000UL)/RS485_Baud; */
 
-/* The maximum time after the end of the stop bit of the final */
-/* octet of a transmitted frame before a node must disable its */
-/* EIA-485 driver: 15 bit times. */
-/* NOTE: AVR lib delay_us limit is 768us; limit is 7bits/9600bps=729us */
-#define Tpostdrive1 (7UL)
-#define Tpostdrive2 (7UL)
-
 /****************************************************************************
 * DESCRIPTION: Initializes the RS485 hardware and variables, and starts in
 *              receive mode.
@@ -176,12 +169,6 @@ void RS485_Transmitter_Enable(
     if (enable) {
         BIT_SET(PORTD, PD2);
     } else {
-#if Tpostdrive1
-        _delay_us(Tpostdrive1 / RS485_Baud);
-#endif
-#if Tpostdrive2
-        _delay_us(Tpostdrive2 / RS485_Baud);
-#endif
         BIT_CLEAR(PORTD, PD2);
     }
 }
@@ -254,15 +241,13 @@ void RS485_Send_Data(
         buffer++;
         nbytes--;
     }
-    while (!BIT_CHECK(UCSR0A, UDRE0)) {
-        /* do nothing - wait until Tx buffer is empty */
-    }
-    /* is the frame sent? */
+    /* Clear the Transmit Complete flag by writing a one to it. */
+    BIT_SET(UCSR0A, TXC0);
+    /* was the frame sent? */
     while (!BIT_CHECK(UCSR0A, TXC0)) {
-        /* do nothing - wait until the entire frame in the 
+        /* do nothing - wait until the entire frame in the
            Transmit Shift Register has been shifted out */
     }
-    BIT_CLEAR(UCSR0A, TXC0);
     /* per MSTP spec, sort of */
     Timer_Silence_Reset();
 }
@@ -304,7 +289,7 @@ bool RS485_ReceiveError(
 }
 
 /****************************************************************************
-* DESCRIPTION: Return true if data is available 
+* DESCRIPTION: Return true if data is available
 * RETURN:      true if data is available, with the data in the parameter set
 * ALGORITHM:   none
 * NOTES:       none