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127 lines
3.7 KiB
C
127 lines
3.7 KiB
C
/*
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* Copyright (c) 2005, Swedish Institute of Computer Science
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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* @(#)$Id: rs232.c,v 1.9 2009/06/29 12:46:50 nvt-se Exp $
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*/
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/** \addtogroup esbrs232
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* @{ */
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/**
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* \file
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* RS232 communication device driver for the MSP430.
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* \author Adam Dunkels <adam@sics.se>
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*
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* This file contains an RS232 device driver for the MSP430 microcontroller.
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*
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*/
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#include <io.h>
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#include <signal.h>
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#include <string.h>
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#include "dev/msb430-uart1.h"
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#include "rs232.h"
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#ifndef U1IFG
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#define U1IFG IFG2
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#endif
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/*---------------------------------------------------------------------------*/
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/**
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* Initalize the RS232 port.
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*
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*/
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void
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rs232_init(void)
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{
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rs232_set_speed(RS232_115200);
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}
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/*---------------------------------------------------------------------------*/
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int
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putchar(int c)
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{
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if(uart_get_mode() == UART_MODE_RS232) {
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/* Loop until the transmission buffer is available. */
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UART_WAIT_TX();
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/* Transmit the data. */
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UART_TX = c;
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return c;
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} else {
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return -1;
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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rs232_send(char c)
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{
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/* Check if the UART is in RS232 mode before sending.
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This check can be ommitted if every access to rs232 locks the uart
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before using it.
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*/
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putchar(c);
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}
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/*---------------------------------------------------------------------------*/
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void
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rs232_set_speed(enum rs232_speed speed)
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{
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// baud
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const unsigned char br_table[5][3] = {
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{0x00, 0x01, 0x00}, // 9600
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{0x80, 0x00, 0x00}, // 19200
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{0x40, 0x00, 0x00}, // 38400
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{0x2a, 0x00, 0x5b}, // 57600
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{0x15, 0x00, 0x4a} // 115200
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};
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uart_set_speed(UART_MODE_RS232, br_table[speed][0],
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br_table[speed][1], br_table[speed][2]);
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}
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/*---------------------------------------------------------------------------*/
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void
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rs232_print(char *cptr)
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{
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/* lock UART for the print operation */
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if(uart_lock(UART_MODE_RS232)) {
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while(*cptr != 0) {
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rs232_send(*cptr);
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++cptr;
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}
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uart_unlock(UART_MODE_RS232);
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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rs232_set_input(uart_handler_t f)
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{
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uart_set_handler(UART_MODE_RS232, f);
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}
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/** @} */
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