nes-proj/os/dev/serial-line.h
2017-09-01 15:29:00 +02:00

77 lines
2.7 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.
*
*/
/**
* \file
* Generic serial I/O process header filer
* \author
* Adam Dunkels
*
*/
#ifndef SERIAL_LINE_H_
#define SERIAL_LINE_H_
#include "contiki.h"
/**
* Event posted when a line of input has been received.
*
* This event is posted when an entire line of input has been received
* from the serial port. A data pointer to the incoming line of input
* is sent together with the event.
*/
extern process_event_t serial_line_event_message;
/**
* Get one byte of input from the serial driver.
*
* This function is to be called from the actual RS232 driver to get
* one byte of serial data input.
*
* For systems using low-power CPU modes, the return value of the
* function can be used to determine if the CPU should be woken up or
* not. If the function returns non-zero, the CPU should be powered
* up. If the function returns zero, the CPU can continue to be
* powered down.
*
* \param c The data that is received.
*
* \return Non-zero if the CPU should be powered up, zero otherwise.
*/
int serial_line_input_byte(unsigned char c);
void serial_line_init(void);
PROCESS_NAME(serial_line_process);
#endif /* SERIAL_LINE_H_ */