/* sd2snes - SD card based universal cartridge for the SNES Copyright (C) 2009-2010 Maximilian Rehkopf 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++]; }