Add segmentation support functions (#1218)

* Added segmentation support functions and example changes, but no support for segmentation in the TSM or APDU handlers.

src/bacnet/basic/object/device.c

@@ -1333,7 +1333,11 @@ uint8_t Device_Protocol_Revision(void)
 
 BACNET_SEGMENTATION Device_Segmentation_Supported(void)
 {
+#if BACNET_SEGMENTATION_ENABLED
+    return SEGMENTATION_BOTH;
+#else
     return SEGMENTATION_NONE;
+#endif
 }
 
 /**
@@ -1804,8 +1808,12 @@ int Device_Read_Property_Local(BACNET_READ_PROPERTY_DATA *rpdata)
                 rpdata->object_instance, rpdata->array_index,
                 Device_Object_List_Element_Encode, count, apdu, apdu_max);
             if (apdu_len == BACNET_STATUS_ABORT) {
+#if BACNET_SEGMENTATION_ENABLED
+                rpdata->error_code = ERROR_CODE_ABORT_BUFFER_OVERFLOW;
+#else
                 rpdata->error_code =
                     ERROR_CODE_ABORT_SEGMENTATION_NOT_SUPPORTED;
+#endif
             } else if (apdu_len == BACNET_STATUS_ERROR) {
                 rpdata->error_class = ERROR_CLASS_PROPERTY;
                 rpdata->error_code = ERROR_CODE_INVALID_ARRAY_INDEX;