Added validation for ETX Acceleration definitions.

Change-Id: I596ffefe56d581adc7980e7cc0a4e756f8926f69

Author: Juha Heiskanen

source/Service_Libs/etx/etx.c

@@ -43,6 +43,18 @@ static void etx_value_change_callback_needed_check(uint16_t etx, uint16_t *store
 static void etx_accum_failures_callback_needed_check(etx_storage_t *entry, uint8_t attribute_index);
 static void etx_cache_entry_init(uint8_t attribute_index);
 
+#if ETX_ACCELERATED_SAMPLE_COUNT == 0 || ETX_ACCELERATED_SAMPLE_COUNT > 6
+#error "ETX_ACCELERATED_SAMPLE_COUNT accepted values 1-6"
+#endif
+
+#if ETX_ACCELERATED_INTERVAL == 0
+#error "ETX_ACCELERATED_INTERVAL can't be zero"
+#endif
+
+#if ETX_ACCELERATED_INTERVAL >= ETX_ACCELERATED_SAMPLE_COUNT
+#error "ETX_ACCELERATED_INTERVAL must be < ETX_ACCELERATED_SAMPLE_COUNT"
+#endif
+
 
 typedef struct {
     etx_value_change_handler_t *callback_ptr;

source/Service_Libs/etx/etx.h

@@ -37,7 +37,7 @@
  * After this value is received the ETX calculation starts to follow the
  * slower ETX cache configuration values.
  *
- * Maximum value is 7
+ * Maximum value is 6
  */
 #define ETX_ACCELERATED_SAMPLE_COUNT      3