| /* |
| Copyright (c) 2011 Arduino. All right reserved. |
| |
| This library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| This library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| See the GNU Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with this library; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * \file syscalls_sam3.c |
| * |
| * Implementation of newlib syscall. |
| * |
| */ |
| |
| /*---------------------------------------------------------------------------- |
| * Headers |
| *----------------------------------------------------------------------------*/ |
| |
| |
| #include "syscalls.h" |
| |
| #include <stdio.h> |
| #include <stdarg.h> |
| #include "sam.h" |
| #if defined ( __GNUC__ ) /* GCC CS3 */ |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #endif |
| |
| /*---------------------------------------------------------------------------- |
| * Exported variables |
| *----------------------------------------------------------------------------*/ |
| |
| #undef errno |
| extern int errno ; |
| extern int _end ; |
| |
| /*---------------------------------------------------------------------------- |
| * Exported functions |
| *----------------------------------------------------------------------------*/ |
| extern void _exit( int status ) ; |
| extern void _kill( int pid, int sig ) ; |
| extern int _getpid ( void ) ; |
| |
| extern caddr_t _sbrk ( int incr ) |
| { |
| static unsigned char *heap = NULL ; |
| unsigned char *prev_heap ; |
| |
| if ( heap == NULL ) |
| { |
| heap = (unsigned char *)&_end ; |
| } |
| prev_heap = heap; |
| |
| heap += incr ; |
| |
| return (caddr_t) prev_heap ; |
| } |
| |
| extern int link( char *cOld, char *cNew ) |
| { |
| return -1 ; |
| } |
| |
| extern int _close( int file ) |
| { |
| return -1 ; |
| } |
| |
| extern int _fstat( int file, struct stat *st ) |
| { |
| st->st_mode = S_IFCHR ; |
| |
| return 0 ; |
| } |
| |
| extern int _isatty( int file ) |
| { |
| return 1 ; |
| } |
| |
| extern int _lseek( int file, int ptr, int dir ) |
| { |
| return 0 ; |
| } |
| |
| extern int _read(int file, char *ptr, int len) |
| { |
| return 0 ; |
| } |
| |
| extern int _write( int file, char *ptr, int len ) |
| { |
| int iIndex ; |
| |
| |
| // for ( ; *ptr != 0 ; ptr++ ) |
| for ( iIndex=0 ; iIndex < len ; iIndex++, ptr++ ) |
| { |
| // UART_PutChar( *ptr ) ; |
| |
| // Check if the transmitter is ready |
| while ((UART->UART_SR & UART_SR_TXRDY) != UART_SR_TXRDY) |
| ; |
| |
| // Send character |
| UART->UART_THR = *ptr; |
| } |
| |
| return iIndex ; |
| } |
| |
| extern void _exit( int status ) |
| { |
| printf( "Exiting with status %d.\n", status ) ; |
| |
| for ( ; ; ) ; |
| } |
| |
| extern void _kill( int pid, int sig ) |
| { |
| return ; |
| } |
| |
| extern int _getpid ( void ) |
| { |
| return -1 ; |
| } |