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ethanzonca

Rework some structure to segregate business logic of PID / thermostatic control / temp sensing

//
// Sbrk: Basic _sbrk implementation to make *printf work
//

#include <sys/stat.h>

caddr_t _sbrk(int incr)
{
extern char end asm("end");
static char *heap_end;
char *prev_heap_end;

if (heap_end == 0) {
heap_end = &end;
}

prev_heap_end = heap_end;

heap_end += incr;

return (caddr_t)prev_heap_end;
}