/* 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(); } void file_open_by_filinfo(FILINFO* fno) { file_res = l_openfilebycluster(&fatfs, &file_handle, (TCHAR*)"", fno->clust, fno->fsize); } void file_open(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++]; }