+++ /dev/null
-/*
- * Copyright Droids Corporation, Microb Technology, Eirbot (2005)
- *
- * 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 : $Id: uart_send_nowait.c,v 1.1.2.2 2008-12-27 16:50:01 zer0 Exp $
- *
- */
-
-/* Olivier MATZ, Droids-corp 2004 - 2009 */
-
-#include <uart.h>
-#include <uart_defs.h>
-#include <uart_private.h>
-
-
-/* send a char, or put it in the fifo if uart is not ready. Return -1
- * if fifo is full */
-int uart_send_nowait(uint8_t num, char c)
-{
- uint8_t flags;
-
- IRQ_LOCK(flags);
-
- /* if uart intrp mode is disabled (note that we look rx */
- /* intrp -- RXCIE is 0) */
- if ( !(*uart_regs[num].ucsrb & (1 << RXCIE )) ) {
- /* we have to poll the status register before xmit */
- if (*uart_regs[num].ucsra & (1<<UDRE)) {
- uart_set_udr(num, c);
- IRQ_UNLOCK(flags);
- return 0;
- }
- else {
- IRQ_UNLOCK(flags);
- return -1;
- }
- }
-
- if (CIRBUF_IS_FULL(&g_tx_fifo[num])) {
- IRQ_UNLOCK(flags);
- return -1;
- }
-
- /* uart is ready to send */
- if (CIRBUF_IS_EMPTY(&g_tx_fifo[num]) &&
- *uart_regs[num].ucsra & (1<<UDRE)) {
- uart_set_udr(num, c);
- sbi(*uart_regs[num].ucsrb, UDRIE); /* XXX */
- }
- else { /* not ready, put char in fifo */
- cirbuf_add_head(&g_tx_fifo[num], c);
- }
-
- IRQ_UNLOCK(flags);
- return 0;
-}