source: rtos_arduino/trunk/arduino_lib/hardware/arduino/samd/cores/arduino/syscalls.c@ 136

Last change on this file since 136 was 136, checked in by ertl-honda, 8 years ago

ライブラリとOS及びベーシックなサンプルの追加．
File size: 2.4 KB
Line 
1/*
2 Copyright (c) 2014 Arduino. All right reserved.
3
4 This library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 This library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12 See the GNU Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with this library; if not, write to the Free Software
16 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17*/
18
19/**
20 * Implementation of newlib syscall.
21 *
22 */
23
24#include <errno.h>
25
26#include "syscalls.h"
27#include "sam.h"
28
29#ifdef __cplusplus
30extern "C" {
31#endif
32
33#undef errno
34extern int errno ;
35extern int __end__ ;
36extern int __ram_end__ ;
37
38extern caddr_t _sbrk( int incr )
39{
40 static unsigned char *heap = NULL ;
41 unsigned char *prev_heap ;
42 int ramend = (int)&__ram_end__ ;
43
44 if ( heap == NULL )
45 {
46 heap = (unsigned char *)&__end__ ;
47 }
48 prev_heap = heap ;
49
50 if ( ((int)prev_heap + incr) > ramend )
51 {
52 return (caddr_t) -1 ;
53 }
54
55 heap += incr ;
56
57 return (caddr_t) prev_heap ;
58}
59
60extern int link( char *cOld, char *cNew )
61{
62 return -1 ;
63}
64
65extern int _close( int file )
66{
67 return -1 ;
68}
69
70extern int _fstat( int file, struct stat *st )
71{
72 st->st_mode = S_IFCHR ;
73
74 return 0 ;
75}
76
77extern int _isatty( int file )
78{
79 return 1 ;
80}
81
82extern int _lseek( int file, int ptr, int dir )
83{
84 return 0 ;
85}
86
87extern int _read(int file, char *ptr, int len)
88{
89 return 0 ;
90}
91
92extern int _write( int file, char *ptr, int len )
93{
94 int iIndex=0 ;
95
96 switch ( file )
97 {
98 case 1 /*STDOUT_FILENO*/:
99 for ( ; len >= 0 ; len--, ptr++, iIndex++ )
100 {
101 // Check if the transmitter is ready
102 // while ((UART->UART_SR & UART_SR_TXRDY) != UART_SR_TXRDY)
103 {
104 }
105
106 // Send character
107 // UART->UART_THR = *ptr;
108 }
109 break;
110
111 default:
112 errno = EBADF ;
113 iIndex = -1 ;
114 break;
115 }
116
117 return iIndex ;
118}
119
120extern void _exit( int status )
121{
122 printf( "Exiting with status %d.\n", status ) ;
123
124 for ( ; ; ) ;
125}
126
127extern void _kill( int pid, int sig )
128{
129 return ;
130}
131
132extern int _getpid ( void )
133{
134 return -1 ;
135}
136
137#ifdef __cplusplus
138}
139#endif
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