stdream_rdir.c File Reference

Stream redirection. More...

#include <stdio.h>
#include "sarmfsw.h"
#include "UART_term.h"
#include "stdream_rdir.h"

Include dependency graph for stdream_rdir.c:

Functions
int	_write (int file, char *ptr, int len)
	syscalls implementation of _write

Detailed Description

Stream redirection.

Author

SMFSW

Copyright

MIT (c) 2017-2026, SMFSW

Note

define ITM_REDIRECT in compiler defines for stings to be printed to ITM0 port

define UART_REDIRECT and DBG_SERIAL in compiler defines with an UART instance to send printf likes strings to UART

Warning

By default when using syscalls, stdout stream is buffered, meaning that output will only be processed when '\n' (new line) character is sent to buffer. To override this behavior, stdout_no_buffer has to be called once in init routine to disable buffering, thus processing characters as they come.

Function Documentation

_write()

int _write	(	int	file,
		char *	ptr,
		int	len )

syscalls implementation of _write

Strong Functions

Strong implementation of _write for UART & ITM string send to stream

Parameters

[in]	file	- unused
[in]	ptr	- pointer to string to send to stream
[in]	len	- length of string to send to stream

Returns

length written to stream (-1 otherwise)

Return values

-1	is returned in case of failure (UART)

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