io.h

Hardware and firmware for a DSP based digital audio MP3 player with USB pen drive funtionality, usin

/*
 * DSPdap-bootloader - DSP based Digital Audio Player, Bootloader
 * Copyright (C) 2004-2007 Roger Quadros <rogerquads @ yahoo . com>
 * http://dspdap.sourceforge.net
 *
 * 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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
 *
 * $Id: IO.h,v 1.2 2007/06/03 08:54:03 Roger Exp $
 */

void LED_on();	//Turns ON the LED
void LED_off();	//Turns OFF the LED


//writes 16-bit word data to memory whose address is specified in mem_addr
void write_mem(long mem_addr, int data);	
										
//returns the word contained in the memory location whose address is specified in mem_addr
int read_mem(long mem_addr);	

//configures EMIF for data EMIF mode
void config_EMIF();

//returns the AGPIO status
int get_AGPIO();

//reads 256 words (512 bytes) from specified memory address to buffer
int read_sector(long mem_addr, unsigned int* buffer);