usb.h

老外个人做的MP3/优盘。使用ATMEL MEGA系列的MCU

/* ***********************************************************************
**
**  Copyright (C) 2002  Jesper Hansen <[e-mail]> and 
**			Romuald Bialy (MIS) <[e-mail]>.
**
**
**  Yampp-3/USB - low level support library
**
**
*************************************************************************
**
**   This file is part of the yampp system.
**
**  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.
**
*************************************************************************
**
**  Revision History
**
**  when         what  who	why
**
**  2002-09-01   1.0   MIS      initial public release
**
*********************************************************************** */



#define USB_PORT	PORTD

#define USB_TXRDY	PD4
#define USB_RXRDY	PD5

#define USB_WR		PD6
#define USB_RD		PD7

#define USB_ADDR	0x8000



#ifndef USB_ASM

#define usb_rxready bit_is_clear(PIN(USB_PORT), USB_RXRDY)

#define usb_txfree 	bit_is_clear(PIN(USB_PORT), USB_TXRDY)



void usb_init(void);
u08 usb_readbyte(void);
void usb_writebyte(u08 b);

u08 usb_readblock(u08* ptr, u16 length);
u08 usb_writeblock(u08* ptr, u16 length);

#endif