4 * This file is part of BeRTOS.
6 * Bertos is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * As a special exception, you may use this file as part of a free software
21 * library without restriction. Specifically, if other files instantiate
22 * templates or use macros or inline functions from this file, or you compile
23 * this file and link it with other files to produce an executable, this
24 * file does not by itself cause the resulting executable to be covered by
25 * the GNU General Public License. This exception does not however
26 * invalidate any other reasons why the executable file might be covered by
27 * the GNU General Public License.
29 * Copyright (C) 2003,2004 Develer S.r.l. (http://www.develer.com/)
30 * Copyright (C) 2000 Bernie Innocenti <bernie@codewiz.org>
35 * \author Bernie Innocenti <bernie@codewiz.org>
37 * \brief CPU specific serial I/O driver
42 *#* Revision 1.7 2006/07/19 12:56:26 bernie
43 *#* Convert to new Doxygen style.
45 *#* Revision 1.6 2005/11/04 16:20:02 bernie
46 *#* Fix reference to README.devlib in header.
48 *#* Revision 1.5 2004/12/13 11:51:08 bernie
49 *#* DISABLE_INTS/ENABLE_INTS: Convert to IRQ_DISABLE/IRQ_ENABLE.
51 *#* Revision 1.4 2004/08/25 14:12:08 rasky
52 *#* Aggiornato il comment block dei log RCS
54 *#* Revision 1.3 2004/06/03 11:27:09 bernie
55 *#* Add dual-license information.
57 *#* Revision 1.2 2004/05/23 18:21:53 bernie
58 *#* Trim CVS logs and cleanup header info.
65 #define SER_HW_ENABLE_TX \
70 (INT_PEND1 |= INT1F_TI) \
74 static volatile bool ser_sending;
77 INTERRUPT(0x30) void TI_interrupt(void)
85 /* Can we send two bytes at the same time? */
86 if (SP_STAT & SPSF_TX_EMPTY)
88 SBUF = fifo_pop(&ser_txfifo);
97 SBUF = fifo_pop(&ser_txfifo);
100 INTERRUPT(0x32) void RI_interrupt(void)
102 ser_status |= SP_STAT &
103 (SPSF_OVERRUN_ERROR | SPSF_PARITY_ERROR | SPSF_FRAMING_ERROR);
104 if (fifo_isfull(&ser_rxfifo))
105 ser_status |= SERRF_RXFIFOOVERRUN;
107 fifo_push(&ser_rxfifo, SBUF);
110 static void ser_setbaudrate(unsigned long rate)
112 // Calcola il periodo per la generazione del baud rate richiesto
113 uint16_t baud = (uint16_t)(((CPU_FREQ / 16) / rate) - 1) | 0x8000;
114 BAUD_RATE = (uint8_t)baud;
115 BAUD_RATE = (uint8_t)(baud >> 8);
118 static void ser_hw_init(void)
120 // Inizializza la porta seriale
121 SP_CON = SPCF_RECEIVE_ENABLE | SPCF_MODE1;
122 ioc1_img |= IOC1F_TXD_SEL | IOC1F_EXTINT_SRC;
125 // Svuota il buffer di ricezione
127 uint8_t dummy = SBUF;
130 // Abilita gli interrupt
131 INT_MASK1 |= INT1F_TI | INT1F_RI;