Contiki 2.6
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00001 /* 00002 * Copyright (c) 2005, Swedish Institute of Computer Science 00003 * All rights reserved. 00004 * 00005 * Redistribution and use in source and binary forms, with or without 00006 * modification, are permitted provided that the following conditions 00007 * are met: 00008 * 1. Redistributions of source code must retain the above copyright 00009 * notice, this list of conditions and the following disclaimer. 00010 * 2. Redistributions in binary form must reproduce the above copyright 00011 * notice, this list of conditions and the following disclaimer in the 00012 * documentation and/or other materials provided with the distribution. 00013 * 3. Neither the name of the Institute nor the names of its contributors 00014 * may be used to endorse or promote products derived from this software 00015 * without specific prior written permission. 00016 * 00017 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 00018 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00019 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00020 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 00021 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00022 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 00023 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00024 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 00025 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 00026 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00027 * SUCH DAMAGE. 00028 * 00029 * This file is part of the Contiki operating system. 00030 * 00031 * @(#)$Id: rs232.c,v 1.9 2009/06/29 12:46:50 nvt-se Exp $ 00032 */ 00033 00034 /** \addtogroup esbrs232 00035 * @{ */ 00036 00037 /** 00038 * \file 00039 * RS232 communication device driver for the MSP430. 00040 * \author Adam Dunkels <adam@sics.se> 00041 * 00042 * This file contains an RS232 device driver for the MSP430 microcontroller. 00043 * 00044 */ 00045 #include "contiki.h" 00046 #include <string.h> 00047 #include "dev/msb430-uart1.h" 00048 #include "rs232.h" 00049 00050 #ifndef U1IFG 00051 #define U1IFG IFG2 00052 #endif 00053 00054 /*---------------------------------------------------------------------------*/ 00055 /** 00056 * Initalize the RS232 port. 00057 * 00058 */ 00059 void 00060 rs232_init(void) 00061 { 00062 rs232_set_speed(RS232_115200); 00063 } 00064 /*---------------------------------------------------------------------------*/ 00065 int 00066 putchar(int c) 00067 { 00068 if(uart_get_mode() == UART_MODE_RS232) { 00069 /* Loop until the transmission buffer is available. */ 00070 UART_WAIT_TX(); 00071 /* Transmit the data. */ 00072 UART_TX = c; 00073 return c; 00074 } else { 00075 return -1; 00076 } 00077 } 00078 /*---------------------------------------------------------------------------*/ 00079 void 00080 rs232_send(char c) 00081 { 00082 /* Check if the UART is in RS232 mode before sending. 00083 This check can be ommitted if every access to rs232 locks the uart 00084 before using it. 00085 */ 00086 00087 putchar(c); 00088 } 00089 /*---------------------------------------------------------------------------*/ 00090 void 00091 rs232_set_speed(enum rs232_speed speed) 00092 { 00093 // baud 00094 const unsigned char br_table[5][3] = { 00095 {0x00, 0x01, 0x00}, // 9600 00096 {0x80, 0x00, 0x00}, // 19200 00097 {0x40, 0x00, 0x00}, // 38400 00098 {0x2a, 0x00, 0x5b}, // 57600 00099 {0x15, 0x00, 0x4a} // 115200 00100 }; 00101 00102 uart_set_speed(UART_MODE_RS232, br_table[speed][0], 00103 br_table[speed][1], br_table[speed][2]); 00104 } 00105 /*---------------------------------------------------------------------------*/ 00106 void 00107 rs232_print(char *cptr) 00108 { 00109 /* lock UART for the print operation */ 00110 if(uart_lock(UART_MODE_RS232)) { 00111 while(*cptr != 0) { 00112 rs232_send(*cptr); 00113 ++cptr; 00114 } 00115 uart_unlock(UART_MODE_RS232); 00116 } 00117 } 00118 /*---------------------------------------------------------------------------*/ 00119 void 00120 rs232_set_input(uart_handler_t f) 00121 { 00122 uart_set_handler(UART_MODE_RS232, f); 00123 } 00124 /** @} */