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Mark Qvist 2014-04-03 22:21:37 +02:00
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/**
* \file
* <!--
* This file is part of BeRTOS.
*
* Bertos 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* As a special exception, you may use this file as part of a free software
* library without restriction. Specifically, if other files instantiate
* templates or use macros or inline functions from this file, or you compile
* this file and link it with other files to produce an executable, this
* file does not by itself cause the resulting executable to be covered by
* the GNU General Public License. This exception does not however
* invalidate any other reasons why the executable file might be covered by
* the GNU General Public License.
*
* Copyright (C) 2003,2004 Develer S.r.l. (http://www.develer.com/)
* Copyright (C) 2000 Bernie Innocenti <bernie@codewiz.org>
*
* -->
*
*
* \author Bernie Innocenti <bernie@codewiz.org>
*
* \brief CPU specific serial I/O driver
*/
/*#*
*#* $Log$
*#* Revision 1.7 2006/07/19 12:56:26 bernie
*#* Convert to new Doxygen style.
*#*
*#* Revision 1.6 2005/11/04 16:20:02 bernie
*#* Fix reference to README.devlib in header.
*#*
*#* Revision 1.5 2004/12/13 11:51:08 bernie
*#* DISABLE_INTS/ENABLE_INTS: Convert to IRQ_DISABLE/IRQ_ENABLE.
*#*
*#* Revision 1.4 2004/08/25 14:12:08 rasky
*#* Aggiornato il comment block dei log RCS
*#*
*#* Revision 1.3 2004/06/03 11:27:09 bernie
*#* Add dual-license information.
*#*
*#* Revision 1.2 2004/05/23 18:21:53 bernie
*#* Trim CVS logs and cleanup header info.
*#*
*#*/
#include "hw.h"
#include "serhw.h"
#define SER_HW_ENABLE_TX \
ATOMIC( \
if (!ser_sending) \
{ \
ser_sending = true; \
(INT_PEND1 |= INT1F_TI) \
} \
);
static volatile bool ser_sending;
// Serial TX intr
INTERRUPT(0x30) void TI_interrupt(void)
{
if (CANT_SEND)
{
ser_sending = false;
return;
}
/* Can we send two bytes at the same time? */
if (SP_STAT & SPSF_TX_EMPTY)
{
SBUF = fifo_pop(&ser_txfifo);
if (CANT_SEND)
{
ser_sending = false;
return;
}
}
SBUF = fifo_pop(&ser_txfifo);
}
INTERRUPT(0x32) void RI_interrupt(void)
{
ser_status |= SP_STAT &
(SPSF_OVERRUN_ERROR | SPSF_PARITY_ERROR | SPSF_FRAMING_ERROR);
if (fifo_isfull(&ser_rxfifo))
ser_status |= SERRF_RXFIFOOVERRUN;
else
fifo_push(&ser_rxfifo, SBUF);
}
static void ser_setbaudrate(unsigned long rate)
{
// Calcola il periodo per la generazione del baud rate richiesto
uint16_t baud = (uint16_t)(((CPU_FREQ / 16) / rate) - 1) | 0x8000;
BAUD_RATE = (uint8_t)baud;
BAUD_RATE = (uint8_t)(baud >> 8);
}
static void ser_hw_init(void)
{
// Inizializza la porta seriale
SP_CON = SPCF_RECEIVE_ENABLE | SPCF_MODE1;
ioc1_img |= IOC1F_TXD_SEL | IOC1F_EXTINT_SRC;
IOC1 = ioc1_img;
// Svuota il buffer di ricezione
{
uint8_t dummy = SBUF;
}
// Abilita gli interrupt
INT_MASK1 |= INT1F_TI | INT1F_RI;
}