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