#if (ARDUINO >= 100)
#include
#else
#include
#endif
extern unsigned int __heap_start;
extern void *__brkval;
/*
* The free list structure as maintained by the
* avr-libc memory allocation routines.
*/
struct __freelist {
size_t sz;
struct __freelist *nx;
};
/* The head of the free list structure */
extern struct __freelist *__flp;
#include "MemoryFree.h";
/* Calculates the size of the free list */
int freeListSize() {
struct __freelist* current;
int total = 0;
for (current = __flp; current; current = current->nx) {
total += 2; /* Add two bytes for the memory block's header */
total += (int) current->sz;
}
return total;
}
int freeMemory() {
int free_memory;
if ((int)__brkval == 0) {
free_memory = ((int)&free_memory) - ((int)&__heap_start);
} else {
free_memory = ((int)&free_memory) - ((int)__brkval);
free_memory += freeListSize();
}
return free_memory;
}