/*----------------------------------------------------------------------------
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* Name: Retarget.c
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* Purpose: 'Retarget' layer for target-dependent low level functions
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* Note(s):
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*----------------------------------------------------------------------------
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* This file is part of the uVision/ARM development tools.
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* This software may only be used under the terms of a valid, current,
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* end user licence from KEIL for a compatible version of KEIL software
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* development tools. Nothing else gives you the right to use this software.
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*
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* This software is supplied "AS IS" without warranties of any kind.
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*
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* Copyright (c) 2012 Keil - An ARM Company. All rights reserved.
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*----------------------------------------------------------------------------*/
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#include <sys/stat.h>
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#include <string.h>
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#include <errno.h>
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int SER_PutChar (int c) {
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return (c);
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}
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int SER_GetChar (void) {
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return (-1);
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}
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/*-- GCC - Newlib runtime support --------------------------------------------*/
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extern int __HeapBase;
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extern int __HeapLimit;
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int _open (const char * path, int flags, ...)
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{
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return (-1);
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}
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int _close (int fd)
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{
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return (-1);
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}
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int _lseek (int fd, int ptr, int dir)
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{
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return (0);
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}
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int __attribute__((weak)) _fstat (int fd, struct stat * st)
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{
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memset (st, 0, sizeof (* st));
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st->st_mode = S_IFCHR;
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return (0);
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}
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int _isatty (int fd)
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{
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return (1);
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}
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int _read (int fd, char * ptr, int len)
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{
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char c;
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int i;
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for (i = 0; i < len; i++)
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{
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c = SER_GetChar();
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if (c == 0x0D) break;
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*ptr++ = c;
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SER_PutChar(c);
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}
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return (len - i);
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}
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int _write (int fd, char * ptr, int len)
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{
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int i;
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for (i = 0; i < len; i++) SER_PutChar (*ptr++);
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return (i);
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}
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caddr_t _sbrk (int incr)
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{
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static char * heap;
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char * prev_heap;
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if (heap == NULL)
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{
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heap = (char *)&__HeapBase;
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}
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prev_heap = heap;
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if ((heap + incr) > (char *)&__HeapLimit)
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{
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errno = ENOMEM;
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return (caddr_t) -1;
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}
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heap += incr;
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return (caddr_t) prev_heap;
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}
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