Enhanced the WriteProperty service demo to allow multiple tagged data elements and to allow context data.

bacnet-stack/bacapp.h

@@ -41,8 +41,11 @@
 #include "bacstr.h"
 #include "datetime.h"
 
+struct BACnet_Application_Data_Value;
 typedef struct BACnet_Application_Data_Value {
-    uint8_t tag;                /* application or context-specific number */
+    bool context_specific; /* true if context specific data */
+    uint8_t context_tag; /* only used for context specific data */
+    uint8_t tag;                /* application tag data type */
     union {
         /* NULL - not needed as it is encoded in the tag alone */
         bool Boolean;
@@ -58,11 +61,15 @@ typedef struct BACnet_Application_Data_Value {
         BACNET_TIME Time;
         BACNET_OBJECT_ID Object_Id;
     } type;
+    /* simple linked list if needed */
+    struct BACnet_Application_Data_Value *next;
 } BACNET_APPLICATION_DATA_VALUE;
 
 #ifdef __cplusplus
 extern "C" {
 #endif                          /* __cplusplus */
+    int bacapp_encode_data(uint8_t * apdu,
+        BACNET_APPLICATION_DATA_VALUE * value);
 
     int bacapp_decode_application_data(uint8_t * apdu,
         int max_apdu_len, BACNET_APPLICATION_DATA_VALUE * value);
@@ -78,6 +85,14 @@ extern "C" {
         BACNET_APPLICATION_DATA_VALUE * value,
         BACNET_PROPERTY_ID property);
 
+    int bacapp_encode_context_data_value(uint8_t * apdu, 
+        uint8_t context_tag_number,
+        BACNET_APPLICATION_DATA_VALUE * value);
+  
+    BACNET_APPLICATION_TAG bacapp_context_tag_type(
+        BACNET_PROPERTY_ID property,
+        uint8_t tag_number);
+
     bool bacapp_copy(BACNET_APPLICATION_DATA_VALUE * dest_value,
         BACNET_APPLICATION_DATA_VALUE * src_value);
 
@@ -99,7 +114,6 @@ extern "C" {
 #ifdef BACAPP_PRINT_ENABLED
     bool bacapp_parse_application_data(BACNET_APPLICATION_TAG tag_number,
         const char *argv, BACNET_APPLICATION_DATA_VALUE * value);
-
     bool bacapp_print_value(FILE * stream,
         BACNET_APPLICATION_DATA_VALUE * value,
         BACNET_PROPERTY_ID property);