contiki/cpu/avr/dev/rs232.h
barner 45cbcde797 - Fix/enhence support for RS232 interface on AVR (ATMega128):
* support for multiple ports: (extended interface with 'port' parameter)
 * new function: rs232_redirect_stdout that allows you to redirect stdout
   to a serial port
- In order to implement support for other MCUs, adopt a copy of
   rs232_atmega128.h
2006-12-22 17:00:45 +00:00

155 lines
5.8 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.
*
* Author: Adam Dunkels <adam@sics.se>
* Simon Barner <barner@in.tum.de>
*
* @(#)$Id: rs232.h,v 1.2 2006/12/22 17:00:45 barner Exp $
*/
#ifndef __RS232_H__
#define __RS232_H__
#include <avr/pgmspace.h>
#include "contiki-conf.h"
#if MCU == atmega128
#include "dev/rs232_atmega128.h"
#else
#error "Please implement a rs232 header for your MCU (or set the MCU type \
in contiki-conf.h)."
#endif
/**
* \brief Initialize the RS232 module
*
* This function is called from the boot up code to
* initalize the RS232 module.
* \param port The RS232 port to be used.
* \param bd The baud rate of the connection.
* \param ffmt The frame format of the connection, i.e. parity mode,
* number of stop and data bits, ...
*/
void
rs232_init (uint8_t port, uint8_t bd, uint8_t ffmt);
/**
* \brief Set an input handler for incoming RS232 data
* \param port The RS232 port to be used.
* \param f A pointer to a byte input handler
*
* This function sets the input handler for incoming RS232
* data. The input handler function is called for every
* incoming data byte. The function is called from the
* RS232 interrupt handler, so care must be taken when
* implementing the input handler to avoid race
* conditions.
*
* The return value of the input handler affects the sleep
* mode of the CPU: if the input handler returns non-zero
* (true), the CPU is awakened to let other processing
* take place. If the input handler returns zero, the CPU
* is kept sleeping.
*/
void
rs232_set_input(uint8_t port, int (* f)(unsigned char));
/**
* \brief Print a text string from program memory on RS232
* \param port The RS232 port to be used.
* \param buf A pointer to the string that is to be printed
*
* This function prints a string from program memory to
* RS232. The string must be terminated by a null
* byte. The RS232 module must be correctly initalized and
* configured for this function to work.
*/
void
rs232_print_p(uint8_t port, prog_char *buf);
/**
* \brief Print a text string on RS232
* \param port The RS232 port to be used.
* \param str A pointer to the string that is to be printed
*
* This function prints a string to RS232. The string must
* be terminated by a null byte. The RS232 module must be
* correctly initalized and configured for this function
* to work.
*/
void
rs232_print(uint8_t port, char *buf);
/**
* \brief Print a formated string on RS232
* \param port The RS232 port to be used.
* \param fmt The format string that is used to construct the string
* from a variable number of arguments.
*
* This function prints a formated string to RS232. Note
* that this function used snprintf internally and thus cuts
* the resulting string after RS232_PRINTF_BUFFER_LENGTH - 1
* bytes. You can override this buffer lenght with the
* RS232_CONF_PRINTF_BUFFER_LENGTH define. The RS232 module
* must becorrectly initalized and configured for this
* function to work.
*/
void
rs232_printf(uint8_t port, const char *fmt, ...);
/**
* \brief Print a character on RS232
* \param port The RS232 port to be used.
* \param c The character to be printed
*
* This function prints a character to RS232. The RS232
* module must be correctly initalized and configured for
* this function to work.
*/
void
rs232_send(uint8_t port, unsigned char c);
/**
* \brief Redirects stdout to a given RS232 port
* \param port The RS232 port to be used.
*
* This function redirects the stdout channel to a given
* RS232 port. Note that this modfies the global variable
* stdout. If you want to restore the previous behaviour, it
* is your responsibility to backup to old value. The RS232
* module must be correctly initalized and configured for
* the redirection to work.
*/
void
rs232_redirect_stdout (uint8_t port);
#endif /* __RS232_H__ */