Improved BACnet Development Kit object handling and storing to SEEPROM and EEPROM. Added device property to check C-Stack size and amount unused.

bacnet-stack/ports/bdk-atxx4-mstp/stack.c

@@ -29,10 +29,10 @@ extern uint8_t _end;
 extern uint8_t __stack;
 
 #define STACK_CANARY (0xC5)
-void stack_paint(
+void stack_init(
     void) __attribute__ ((naked)) __attribute__ ((section(".init1")));
 
-void stack_paint(
+void stack_init(
     void)
 {
 #if 0
@@ -50,3 +50,28 @@ void stack_paint(
         "    cpc r31,r25\n" "    brlo .loop\n" "    breq .loop"::);
 #endif
 }
+
+unsigned stack_size(void)
+{
+    return (&__stack) - (&_end);
+}
+
+uint8_t stack_byte(unsigned offset)
+{
+    return *(&_end + offset);
+}
+
+unsigned stack_unused(void)
+{
+    uint8_t *p = &_end;
+    unsigned count = 0;
+
+    while (p <= &__stack) {
+        if ((*p) != STACK_CANARY) {
+            count = p - (&_end);
+            break;
+        }
+        p++;
+    }
+    return count;
+}