/* 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

   fpga_spi.h: functions for SPI ctrl, SRAM interfacing and feature configuration
*/

#define FPGA_SS_HIGH()	do {PORTC |= _BV(PC7);} while (0)
#define FPGA_SS_LOW()	do {PORTC &= ~_BV(PC7);} while (0)

void fpga_spi_init(void);
void fpga_spi_test(void);
void spi_fpga(void);
void spi_sd(void);
void spi_none(void);
void set_avr_addr(uint32_t);
void set_saveram_mask(uint32_t);
void set_rom_mask(uint32_t);

