91beb8670f
The cc65 tool chain comes with V.24 drivers so it seems reasonable to use the existing Contiki SLIP driver to implement network access via SLIP as alternative to Ethernet. Some notes: - The Ethernet configuration was simplified in order to allow share it with SLIP. - The Contiki SLIP driver presumes an interrupt driven serial receiver to write into the SLIP buffer. However the cc65 V.24 drivers aren't up to that. Therefore the main loops were extended to pull received data from the V.24 buffers and push it into the SLIP buffer. - As far as I understand the serial sender is supposed to block until the data is sent. Therefore a loop calls the non-blocking V.24 driver until the data is sent. On all platforms there's only one V.24 driver available. Therefore V.24 drivers are always loaded statically. On the Apple][ the mouse driver is now loaded statically - independently from SLIP vs. Ethernet. After all there's only one mouse driver available. However there's a major benefit with SLIP: Here all drivers are loaded statically. Therefore the dynamic module loader isn't necessary at all. And without the loader the heap manager isn't necessary at all. This allows for a reduction in code size roughly compensating for the size of the SLIP buffer.
85 lines
2.8 KiB
C
85 lines
2.8 KiB
C
/*
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* Copyright (c) 2017, Swedish Institute of Computer Science
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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* Author: Oliver Schmidt <ol.sc@web.de>
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*
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*/
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#include <serial.h>
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#include <stdlib.h>
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#include "contiki-net.h"
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#include "sys/log.h"
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#include "lib/error.h"
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#include "lib/config.h"
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#include "dev/slip.h"
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/*---------------------------------------------------------------------------*/
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void
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slip_arch_init(unsigned long ubr)
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{
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unsigned err;
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#if WITH_SLIP
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err = ser_install(STATIC_DRIVER);
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#endif /* WITH_SLIP */
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if(err == SER_ERR_OK) {
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err = ser_open((struct ser_params *)config.slip);
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if(err == SER_ERR_OK)
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atexit((void (*)(void))ser_close);
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}
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if(err != SER_ERR_OK) {
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err += '0';
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/* High byte of err serves as string termination. */
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log_message("Serial init error code: ", (char *)&err);
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error_exit();
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}
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tcpip_set_outputfunc(slip_send);
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}
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/*---------------------------------------------------------------------------*/
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void
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slip_arch_writeb(unsigned char c)
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{
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while(ser_put(c) == SER_ERR_OVERFLOW)
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;
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}
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/*---------------------------------------------------------------------------*/
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void
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slip_arch_poll(void)
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{
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static unsigned char c;
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while(ser_get(&c) != SER_ERR_NO_DATA)
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slip_input_byte(c);
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}
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/*---------------------------------------------------------------------------*/
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