retargetio.c File Reference

Provide stdio retargeting for all supported toolchains.


Copyright 2018 Silicon Laboratories Inc.

SPDX-License-Identifier: Zlib

The licensor of this software is Silicon Laboratories Inc.

This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software.

Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:

  1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
  2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
  3. This notice may not be removed or altered from any source distribution.

Definition in file retargetio.c.

#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "em_device.h"


int _close (int file)
 Close a file.
void _exit (int status)
 Exit the program.
int _fstat (int file, struct stat *st)
 Status of an open file.
int _getpid (void)
 Get process ID.
int _isatty (int file)
 Query whether output stream is a terminal.
int _kill (int pid, int sig)
 Send signal to process.
int _lseek (int file, int ptr, int dir)
 Set position in a file.
int _read (int file, char *ptr, int len)
 Read from a file.
caddr_t _sbrk (int incr)
 Increase heap.
int _write (int file, const char *ptr, int len)
 Write to a file.
int RETARGET_ReadChar (void)
 Receive a byte from USART/LEUART and put into global buffer.
int RETARGET_WriteChar (char c)
 Transmit single byte to USART/LEUART.


char _end