www.pudn.com > LPC1768_SD_FAT_VCOM.zip > serial_fifo.h, change:2011-02-18,size:1808b


/* 
	LPCUSB, an USB device driver for LPC microcontrollers	 
	Copyright (C) 2006 Bertrik Sikken (bertrik@sikken.nl) 
 
	Redistribution and use in source and binary forms, with or without 
	modification, are permitted provided that the following conditions are met: 
 
	1. Redistributions of source code must retain the above copyright 
	   notice, this list of conditions and the following disclaimer. 
	2. Redistributions in binary form must reproduce the above copyright 
	   notice, this list of conditions and the following disclaimer in the 
	   documentation and/or other materials provided with the distribution. 
	3. The name of the author may not be used to endorse or promote products 
	   derived from this software without specific prior written permission. 
 
	THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 
	IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 
	OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
	IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,  
	INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
	NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 
	DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
	THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
	(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 
	THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
*/ 
 
#include "lpcusb_type.h" 
 
#define VCOM_FIFO_SIZE	512 
 
typedef struct { 
	int		head; 
	int 	tail; 
	U8		*buf; 
} fifo_t; 
 
void fifo_init(fifo_t *fifo, U8 *buf); 
BOOL fifo_put(fifo_t *fifo, U8 c); 
BOOL fifo_get(fifo_t *fifo, U8 *pc); 
int  fifo_avail(fifo_t *fifo); 
int	 fifo_free(fifo_t *fifo);