00001 /* 00002 * Copyright Droids Corporation, Microb Technology, Eirbot (2005) 00003 * 00004 * This program is free software; you can redistribute it and/or modify 00005 * it under the terms of the GNU General Public License as published by 00006 * the Free Software Foundation; either version 2 of the License, or 00007 * (at your option) any later version. 00008 * 00009 * This program is distributed in the hope that it will be useful, 00010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00012 * GNU General Public License for more details. 00013 * 00014 * You should have received a copy of the GNU General Public License 00015 * along with this program; if not, write to the Free Software 00016 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00017 * 00018 * Revision : $Id: uart_recv_nowait.c,v 1.2 2009-03-15 21:51:18 zer0 Exp $ 00019 * 00020 */ 00021 00022 /* Olivier MATZ, Droids-corp 2004 - 2009 */ 00023 00024 #include <uart.h> 00025 #include <uart_defs.h> 00026 #include <uart_private.h> 00027 00028 /* get a char from the receive fifo */ 00029 int uart_recv_nowait(uint8_t num) 00030 { 00031 char elt = 0; 00032 uint8_t flags; 00033 00034 IRQ_LOCK(flags); 00035 if( !CIRBUF_IS_EMPTY(&g_rx_fifo[num]) ) { 00036 elt = cirbuf_get_tail(&g_rx_fifo[num]); 00037 cirbuf_del_tail(&g_rx_fifo[num]); 00038 IRQ_UNLOCK(flags); 00039 return (int)elt; 00040 } 00041 IRQ_UNLOCK(flags); 00042 return (-1); 00043 }
1.5.6