mk2 fw wip

src/fileops.c

@@ -0,0 +1,80 @@
+/* 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"
+
+/*WCHAR ff_convert(WCHAR w, UINT dir) {
+	return w;	
+}*/
+
+void file_init() {
+	file_res=f_mount(0, &fatfs);
+}
+
+/*void file_open_by_filinfo(FILINFO* fno) {
+	file_res = l_openfilebycluster(&fatfs, &file_handle, (UCHAR*)"", fno->clust, fno->fsize);
+}*/
+
+void file_open(uint8_t* filename, BYTE flags) {
+	file_res = f_open(&file_handle, (TCHAR*)filename, flags);
+}
+
+void file_close() {
+	file_res = f_close(&file_handle);
+}
+
+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);
+	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;
+}