2 * Copyright Droids Corporation, Microb Technology, Eirbot (2005)
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 * Revision : $Id: uart_send.c,v 1.1.2.1 2008-12-27 16:29:08 zer0 Exp $
22 /* Olivier MATZ, Droids-corp 2004 - 2009 */
25 #include <uart_defs.h>
26 #include <uart_private.h>
28 int uart_send(uint8_t num, char c)
30 /* if cannot send the char */
31 if (uart_send_nowait(num, c) == -1) {
33 /* if irq lock are masked and interrupt mode is on, we
34 * have to poll the status register */
35 if (GLOBAL_IRQ_ARE_MASKED() && (*uart_regs[num].ucsrb & (1 << RXCIE)) ) {
36 while( !(*uart_regs[num].ucsra & (1 << UDRE)) );
37 /* send the next char in the fifo to free a
39 uart_send_next_char(num);
40 cirbuf_add_head(&g_tx_fifo[num], c);
43 /* if irq are not locked, we can loop to emit */
44 while(uart_send_nowait(num, c) == -1);