reflow-oven-control-sw/stm-firmware/syscalls.c

#include <stm-periph/uart.h>
#include <sys/types.h>
#include <errno.h>
#include <stddef.h>


char* _sbrk(int incr)
{
	extern char heap_low;    // Defined by the linker
	extern char heap_top;
	static char *heap_end;
	char *prev_heap_end;

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

	prev_heap_end = heap_end;


	if (heap_end + incr > &heap_top) {
		errno = ENOMEM;
		return (char *)-1;
	}

	heap_end += incr;

	return (char *) prev_heap_end;
}

int _isatty(int fd)
{
	(void)fd;

	return 1;
}

int _close(int fd)
{
	(void)fd;

	return 0;
}

int _open(int fd)
{
	(void)fd;

	return 0;
}

int _fstat(void)
{
	return 0;
}

int _lseek(void)
{
	return 0;
}

int _read(void)
{
	return 0;
}

int _write(int fd, const void *buf, int count)
{
	if (fd == 1)
		uart_send_array((char*)buf, count);
	return count;
}