Contiki 2.6

rs232.h

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  * Author:   Adam Dunkels <adam@sics.se>
00032  *           Simon Barner <barner@in.tum.de>
00033  *
00034  */
00035 
00036 #ifndef __RS232_H__
00037 #define __RS232_H__
00038 
00039 #include <avr/pgmspace.h>
00040 #include "contiki-conf.h"
00041 
00042 #if defined (__AVR_ATmega128__)
00043 #include "dev/rs232_atmega128.h"
00044 #elif defined (__AVR_ATmega1281__)
00045 #include "dev/rs232_atmega1281.h"
00046 #elif defined (__AVR_ATmega1284P__)
00047 #include "dev/rs232_atmega1284.h"
00048 #elif defined (__AVR_AT90USB1287__)
00049 #include "dev/rs232_at90usb1287.h"
00050 #elif defined (__AVR_ATmega128RFA1__)
00051 #include "dev/rs232_atmega128rfa1.h"
00052 #elif defined (__AVR_ATmega644__) || defined (__AVR_ATmega328P__)
00053 #include "dev/rs232_atmega644.h"
00054 #elif defined (__AVR_ATmega8__) || defined (__AVR_ATmega8515__) \
00055    || defined (__AVR_ATmega16__) || defined (__AVR_ATmega32__)
00056 #include "dev/rs232_atmega32.h"
00057 #else
00058 #error "Please implement a rs232 header for your MCU (or set the MCU type \
00059 in contiki-conf.h)."
00060 #endif
00061 
00062 /******************************************************************************/
00063 /***   Baud rates                                                             */
00064 /******************************************************************************/
00065 #define BAUD_RATE(x) (F_CPU/16/x-1)
00066 
00067 /**
00068  * \brief      Initialize the RS232 module
00069  *
00070  *             This function is called from the boot up code to
00071  *             initalize the RS232 module.
00072  * \param port The RS232 port to be used.
00073  * \param bd   The baud rate of the connection.
00074  * \param ffmt The frame format of the connection, i.e. parity mode,
00075  *             number of stop and data bits, ...
00076  */
00077 void
00078 rs232_init (uint8_t port, uint8_t bd, uint8_t ffmt);
00079 
00080 /**
00081  * \brief      Set an input handler for incoming RS232 data
00082  * \param port The RS232 port to be used.
00083  * \param f    A pointer to a byte input handler
00084  *
00085  *             This function sets the input handler for incoming RS232
00086  *             data. The input handler function is called for every
00087  *             incoming data byte. The function is called from the
00088  *             RS232 interrupt handler, so care must be taken when
00089  *             implementing the input handler to avoid race
00090  *             conditions.
00091  *
00092  *             The return value of the input handler affects the sleep
00093  *             mode of the CPU: if the input handler returns non-zero
00094  *             (true), the CPU is awakened to let other processing
00095  *             take place. If the input handler returns zero, the CPU
00096  *             is kept sleeping.
00097  */
00098 void
00099 rs232_set_input(uint8_t port, int (* f)(unsigned char));
00100 
00101 
00102 /**
00103  * \brief      Print a text string from program memory on RS232
00104  * \param port The RS232 port to be used.
00105  * \param buf  A pointer to the string that is to be printed
00106  *
00107  *             This function prints a string from program memory to
00108  *             RS232. The string must be terminated by a null
00109  *             byte. The RS232 module must be correctly initalized and
00110  *             configured for this function to work.
00111  */
00112 void
00113 rs232_print(uint8_t port, char *buf);
00114 
00115 /**
00116  * \brief      Print a formated string on RS232
00117  * \param port The RS232 port to be used.
00118  * \param fmt  The format string that is used to construct the string
00119  *             from a variable number of arguments.
00120  *
00121  *             This function prints a formated string to RS232. Note
00122  *             that this function used snprintf internally and thus cuts
00123  *             the resulting string after RS232_PRINTF_BUFFER_LENGTH - 1
00124  *             bytes. You can override this buffer lenght with the
00125  *             RS232_CONF_PRINTF_BUFFER_LENGTH define. The RS232 module
00126  *             must becorrectly initalized and configured for this
00127  *             function to work.
00128  */
00129 void
00130 rs232_printf(uint8_t port, const char *fmt, ...);
00131 
00132 /**
00133  * \brief      Print a character on RS232
00134  * \param port The RS232 port to be used.
00135  * \param c    The character to be printed
00136  *
00137  *             This function prints a character to RS232. The RS232
00138  *             module must be correctly initalized and configured for
00139  *             this function to work.
00140  */
00141 void
00142 rs232_send(uint8_t port, unsigned char c);
00143 
00144 /**
00145  * \brief      Redirects stdout to a given RS232 port
00146  * \param port The RS232 port to be used.
00147  *
00148  *             This function redirects the stdout channel to a given
00149  *             RS232 port. Note that this modfies the global variable
00150  *             stdout. If you want to restore the previous behaviour, it
00151  *             is your responsibility to backup to old value. The RS232
00152  *             module must be correctly initalized and configured for
00153  *             the redirection to work.
00154  */
00155 void
00156 rs232_redirect_stdout (uint8_t port);
00157 
00158 #endif /* __RS232_H__ */