81 lines
2.3 KiB
C
81 lines
2.3 KiB
C
/* sd2snes - SD card based universal cartridge for the SNES
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Copyright (C) 2009-2010 Maximilian Rehkopf <otakon@gmx.net>
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AVR firmware portion
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Inspired by and based on code from sd2iec, written by Ingo Korb et al.
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See sdcard.c|h, config.h.
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FAT file system access based on code by ChaN, Jim Brain, Ingo Korb,
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see ff.c|h.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License only.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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fileops.c: simple file access functions
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*/
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#include <util/delay.h>
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#include "config.h"
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#include "uart.h"
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#include "ff.h"
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#include "fileops.h"
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WCHAR ff_convert(WCHAR w, UINT dir) {
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return w;
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}
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void file_init() {
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f_mount(0, &fatfs);
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}
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void file_open_by_filinfo(FILINFO* fno) {
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file_res = l_openfilebycluster(&fatfs, &file_handle, (UCHAR*)"", fno->clust, fno->fsize);
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}
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void file_open(uint8_t* filename, BYTE flags) {
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file_res = f_open(&file_handle, (unsigned char*)filename, flags);
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}
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void file_close() {
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file_res = f_close(&file_handle);
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}
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UINT file_read() {
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UINT bytes_read;
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file_res = f_read(&file_handle, file_buf, sizeof(file_buf), &bytes_read);
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return bytes_read;
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}
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UINT file_write() {
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UINT bytes_written;
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file_res = f_write(&file_handle, file_buf, sizeof(file_buf), &bytes_written);
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return bytes_written;
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}
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UINT file_readblock(void* buf, uint32_t addr, uint16_t size) {
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UINT bytes_read;
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file_res = f_lseek(&file_handle, addr);
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if(file_handle.fptr != addr) {
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return 0;
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}
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file_res = f_read(&file_handle, buf, size, &bytes_read);
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return bytes_read;
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}
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UINT file_writeblock(void* buf, uint32_t addr, uint16_t size) {
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UINT bytes_written;
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file_res = f_lseek(&file_handle, addr);
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if(file_res) return 0;
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file_res = f_write(&file_handle, buf, size, &bytes_written);
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return bytes_written;
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}
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