mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-08-29 13:29:09 +00:00
156 lines
4.9 KiB
C
156 lines
4.9 KiB
C
/*
|
|
* Copyright (c) 2005, Swedish Institute of Computer Science
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the Institute nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* This file is part of the Contiki operating system.
|
|
*
|
|
* @(#)$Id: rs232.c,v 1.3 2007/08/07 11:06:14 nifi Exp $
|
|
*/
|
|
|
|
/** \addtogroup esbrs232
|
|
* @{ */
|
|
|
|
/**
|
|
* \file
|
|
* RS232 communication device driver for the MSP430.
|
|
* \author Adam Dunkels <adam@sics.se>
|
|
*
|
|
* This file contains an RS232 device driver for the MSP430 microcontroller.
|
|
*
|
|
*/
|
|
|
|
#include <io.h>
|
|
#include <signal.h>
|
|
#include <string.h>
|
|
|
|
#include "contiki-esb.h"
|
|
|
|
static int (* input_handler)(unsigned char) = NULL;
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
interrupt(UART1RX_VECTOR)
|
|
rs232_rx_usart1(void)
|
|
{
|
|
ENERGEST_ON(ENERGEST_TYPE_IRQ);
|
|
/* Check status register for receive errors. - before reading RXBUF since
|
|
it clears the error and interrupt flags */
|
|
if(!(URCTL1 & RXERR) && input_handler != NULL) {
|
|
|
|
if(input_handler(RXBUF1)) {
|
|
LPM4_EXIT;
|
|
}
|
|
} else {
|
|
/* Else read out the char to clear the I-flags, etc. */
|
|
RXBUF1;
|
|
}
|
|
ENERGEST_OFF(ENERGEST_TYPE_IRQ);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
/**
|
|
* Initalize the RS232 port.
|
|
*
|
|
*/
|
|
void
|
|
rs232_init(void)
|
|
{
|
|
|
|
/* RS232 */
|
|
UCTL1 = CHAR; /* 8-bit character */
|
|
UTCTL1 = SSEL1; /* UCLK = MCLK */
|
|
|
|
rs232_set_speed(RS232_57600);
|
|
|
|
input_handler = NULL;
|
|
|
|
ME2 |= (UTXE1 | URXE1); /* Enable USART1 TXD/RXD */
|
|
IE2 |= URXIE1; /* Enable USART1 RX interrupt */
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
rs232_send(char c)
|
|
{
|
|
|
|
ENERGEST_ON(ENERGEST_TYPE_SERIAL);
|
|
/* Loop until the transmission buffer is available. */
|
|
while((IFG2 & UTXIFG1) == 0) {
|
|
}
|
|
|
|
/* Transmit the data. */
|
|
TXBUF1 = c;
|
|
ENERGEST_OFF(ENERGEST_TYPE_SERIAL);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
rs232_set_speed(unsigned char speed)
|
|
{
|
|
if(speed == RS232_19200) {
|
|
/* Set RS232 to 19200 */
|
|
UBR01 = 0x80; /* 2,457MHz/19200 = 128 -> 0x80 */
|
|
UBR11 = 0x00; /* */
|
|
UMCTL1 = 0x00; /* no modulation */
|
|
} else if(speed == RS232_38400) {
|
|
/* Set RS232 to 38400 */
|
|
UBR01 = 0x40; /* 2,457MHz/38400 = 64 -> 0x40 */
|
|
UBR11 = 0x00; /* */
|
|
UMCTL1 = 0x00; /* no modulation */
|
|
} else if(speed == RS232_57600) {
|
|
UBR01 = 0x2a; /* 2,457MHz/57600 = 42.7 -> 0x2A */
|
|
UBR11 = 0x00; /* */
|
|
UMCTL1 = 0x5b; /* */
|
|
} else if(speed == RS232_115200) {
|
|
UBR01 = 0x15; /* 2,457MHz/115200 = 21.4 -> 0x15 */
|
|
UBR11 = 0x00; /* */
|
|
UMCTL1 = 0x4a; /* */
|
|
} else {
|
|
rs232_set_speed(RS232_57600);
|
|
}
|
|
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
rs232_print(char *cptr)
|
|
{
|
|
while(*cptr != 0) {
|
|
rs232_send(*cptr);
|
|
++cptr;
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
rs232_set_input(int (*f)(unsigned char))
|
|
{
|
|
input_handler = f;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
slip_arch_writeb(unsigned char c)
|
|
{
|
|
rs232_send(c);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @} */
|