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143 lines
2.8 KiB
C
143 lines
2.8 KiB
C
/**
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* UNPUBLISHED PROPRIETARY SOURCE CODE
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* Copyright (c) 2016 MXCHIP Inc.
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*
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* The contents of this file may not be disclosed to third parties, copied or
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* duplicated in any form, in whole or in part, without the prior written
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* permission of MXCHIP Corporation.
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*
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*/
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/*
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* @file
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* Interface functions for Newlib libC implementation
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*/
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#include <sys/stat.h>
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#include <sys/times.h>
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#include <sys/unistd.h>
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#include "stdio_newlib.h"
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#include "common.h"
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#undef errno
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extern int errno;
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#ifndef EBADF
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#include <errno.h>
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#endif
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int _close( int file )
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{
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(void) file; /* unused parameter */
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return -1;
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}
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int _open(const char *name, int flags, int mode)
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{
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return -1;
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}
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/* fstat
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* Status of an open file. For consistency with other minimal implementations in these examples,
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* all files are regarded as character special devices.
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* The `sys/stat.h' header file required is distributed in the `include' subdirectory for this C library.
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*/
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int _fstat( int file, struct stat *st )
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{
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(void) file; /* unused parameter */
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st->st_mode = S_IFCHR;
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return 0;
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}
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/* isatty
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* Query whether output stream is a terminal. For consistency with the other minimal implementations,
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*/
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int _isatty( int file )
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{
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switch ( file )
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{
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case STDOUT_FILENO:
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case STDERR_FILENO:
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case STDIN_FILENO:
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return 1;
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default:
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/* errno = ENOTTY; */
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errno = EBADF;
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return 0;
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}
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}
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/* lseek - Set position in a file. Minimal implementation: */
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int _lseek( int file, int ptr, int dir )
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{
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(void) file; /* unused parameter */
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(void) ptr; /* unused parameter */
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(void) dir; /* unused parameter */
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return 0;
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}
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/* read
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* Read a character to a file. `libc' subroutines will use this system routine for input from all files, including stdin
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* Returns -1 on error or blocks until the number of characters have been read.
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*/
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int _read( int file, char *ptr, int len )
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{
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switch ( file )
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{
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case STDIN_FILENO:
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MicoUartRecv(STDIO_UART, ptr, len, 0xFFFFFFFF );
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break;
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default:
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errno = EBADF;
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return -1;
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}
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return len;
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}
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/* write
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* Write a character to a file. `libc' subroutines will use this system routine for output to all files, including stdout
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* Returns -1 on error or number of bytes sent
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*/
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int _write( int file, char *ptr, int len )
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{
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char channel;
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switch ( file )
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{
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case STDOUT_FILENO: /*stdout*/
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channel = 0;
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break;
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case STDERR_FILENO: /* stderr */
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channel = 1;
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break;
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default:
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errno = EBADF;
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return -1;
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}
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UNUSED_PARAMETER( channel );
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#ifndef MICO_DISABLE_STDIO
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MicoUartSend( STDIO_UART, (const char*)ptr, len );
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#endif
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return len;
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}
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