/* * 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 2007/08/20 11:01:14 nvt-se 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 "dev/msb430-uart1.h" #include "rs232.h" #ifndef U1IFG #define U1IFG IFG2 #endif /*---------------------------------------------------------------------------*/ /** * Initalize the RS232 port. * */ void rs232_init(void) { // rs232_set_speed(RS232_57600); rs232_set_speed(RS232_115200); } /*---------------------------------------------------------------------------*/ void rs232_send(char c) { /* Check if the UART is in RS232 mode before sending. This check can be ommitted if every access to rs232 locks the uart before using it. */ if (uart_get_mode() == UART_MODE_RS232) { /* Loop until the transmission buffer is available. */ UART_WAIT_TX(); /* Transmit the data. */ UART_TX = c; } } /*---------------------------------------------------------------------------*/ void rs232_set_speed(enum rs232_speed speed) { // baud const unsigned char br_table[4][3] = { {0x80, 0x00, 0x00}, // 19200 {0x40, 0x00, 0x00}, // 38400 {0x2a, 0x00, 0x5b}, // 57600 {0x15, 0x00, 0x4a} // 115200 }; uart_set_speed(UART_MODE_RS232, br_table[speed][0], br_table[speed][1], br_table[speed][2]); } /*---------------------------------------------------------------------------*/ void rs232_print(char *cptr) { // lock UART for print operation if (uart_lock(UART_MODE_RS232)) { while(*cptr != 0) { rs232_send(*cptr); ++cptr; } uart_unlock(UART_MODE_RS232); } } /*---------------------------------------------------------------------------*/ void rs232_set_input(fp_uart_handler f) { uart_set_handler(UART_MODE_RS232, f); } /** @} */