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

94 lines
1.6 KiB
C

/* Reflow Oven Controller
*
* Copyright (C) 2020 Mario Hüttel <mario.huettel@gmx.net>
*
* This file is part of the Reflow Oven Controller Project.
*
* The reflow oven controller is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* The Reflow Oven Control Firmware is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with the reflow oven controller project.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include <stm-periph/uart.h>
#include <sys/types.h>
#include <errno.h>
#include <stddef.h>
extern struct stm_uart shell_uart;
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_with_dma(&shell_uart, (char *)buf, count);
return count;
}