1 files changed, 26 insertions, 0 deletions
diff --git a/MemoryFree/MemoryFree.c b/MemoryFree/MemoryFree.c
new file mode 100644
index 0000000..8f7e91e
--- /dev/null
+++ b/MemoryFree/MemoryFree.c
@@ -0,0 +1,26 @@
+/*
+ * MemoryFree.c
+ * returns the number of free RAM bytes
+ */
+
+#include "Arduino.h"  
+#include "MemoryFree.h"
+
+extern unsigned int __data_start;
+extern unsigned int __data_end;
+extern unsigned int __bss_start;
+extern unsigned int __bss_end;
+extern unsigned int __heap_start;
+extern void *__brkval;
+
+
+int freeMemory() {
+  int free_memory;
+
+  if((int)__brkval == 0)
+     free_memory = ((int)&free_memory) - ((int)&__bss_end);
+  else
+    free_memory = ((int)&free_memory) - ((int)__brkval);
+
+  return free_memory;
+}