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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();
- }
- 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++];
- }
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