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- /* sd2snes - SD card based universal cartridge for the SNES
- Copyright (C) 2009-2010 Maximilian Rehkopf <otakon@gmx.net>
- AVR firmware portion
- Inspired by and based on code from sd2iec, written by Ingo Korb et al.
- See sdcard.c|h, config.h.
- FAT file system access based on code by ChaN, Jim Brain, Ingo Korb,
- see ff.c|h.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; version 2 of the License only.
- This program 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 General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- fileops.c: simple file access functions
- */
- #include "config.h"
- #include "uart.h"
- #include "ff.h"
- #include "fileops.h"
- #include "diskio.h"
- /*
- WCHAR ff_convert(WCHAR w, UINT dir) {
- return w;
- }*/
- int newcard;
- void file_init()
- {
- file_res = f_mount( 0, &fatfs );
- newcard = 0;
- }
- void file_reinit( void )
- {
- disk_init();
- file_init();
- }
- FRESULT dir_open_by_filinfo( DIR *dir, FILINFO *fno )
- {
- return l_opendirbycluster( &fatfs, dir, ( TCHAR * )"", fno->clust );
- }
- void file_open_by_filinfo( FILINFO *fno )
- {
- file_res = l_openfilebycluster( &fatfs, &file_handle, ( TCHAR * )"", fno->clust, fno->fsize );
- }
- void file_open( const uint8_t *filename, BYTE flags )
- {
- if ( disk_state == DISK_CHANGED )
- {
- file_reinit();
- newcard = 1;
- }
- file_res = f_open( &file_handle, ( TCHAR * )filename, flags );
- file_block_off = sizeof( file_buf );
- file_block_max = sizeof( file_buf );
- file_status = file_res ? FILE_ERR : FILE_OK;
- }
- void file_close()
- {
- file_res = f_close( &file_handle );
- }
- void file_seek( uint32_t offset )
- {
- file_res = f_lseek( &file_handle, ( DWORD )offset );
- }
- UINT file_read()
- {
- UINT bytes_read;
- file_res = f_read( &file_handle, file_buf, sizeof( file_buf ), &bytes_read );
- return bytes_read;
- }
- UINT file_write()
- {
- UINT bytes_written;
- file_res = f_write( &file_handle, file_buf, sizeof( file_buf ), &bytes_written );
- if ( bytes_written < sizeof( file_buf ) )
- {
- printf( "wrote less than expected - card full?\n" );
- }
- return bytes_written;
- }
- UINT file_readblock( void *buf, uint32_t addr, uint16_t size )
- {
- UINT bytes_read;
- file_res = f_lseek( &file_handle, addr );
- if ( file_handle.fptr != addr )
- {
- return 0;
- }
- file_res = f_read( &file_handle, buf, size, &bytes_read );
- return bytes_read;
- }
- UINT file_writeblock( void *buf, uint32_t addr, uint16_t size )
- {
- UINT bytes_written;
- file_res = f_lseek( &file_handle, addr );
- if ( file_res )
- {
- return 0;
- }
- file_res = f_write( &file_handle, buf, size, &bytes_written );
- return bytes_written;
- }
- uint8_t file_getc()
- {
- if ( file_block_off == file_block_max )
- {
- file_block_max = file_read();
- if ( file_block_max == 0 )
- {
- file_status = FILE_EOF;
- }
- file_block_off = 0;
- }
- return file_buf[file_block_off++];
- }
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