drivers/can_virtual/can_virtual.c
author greg
Tue, 19 Feb 2008 14:53:59 +0100
changeset 403 57d5da3b6228
parent 384 83793fc7ce48
child 631 08b6b903f84a
permissions -rw-r--r--
add changes in configure to force xeno --library-dir
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/*
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This file is part of CanFestival, a library implementing CanOpen Stack. 
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Copyright (C): Edouard TISSERANT and Francis DUPIN
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See COPYING file for copyrights details.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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*/
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/*
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	Virtual CAN driver.
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*/
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#include <stdio.h>
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#include <unistd.h>
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#define NEED_PRINT_MESSAGE
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#include "can_driver.h"
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#include "def.h"
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#define MAX_NB_CAN_PIPES 16
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typedef struct {
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  char used;
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  int pipe[2];
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} CANPipe;
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CANPipe canpipes[MAX_NB_CAN_PIPES] = {{0,},{0,},{0,},{0,},{0,},{0,},{0,},{0,},{0,},{0,},{0,},{0,},{0,},{0,},{0,},{0,},};
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/*********functions which permit to communicate with the board****************/
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UNS8 canReceive_driver(CAN_HANDLE fd0, Message *m)
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{
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	if(read(((CANPipe*)fd0)->pipe[0], m, sizeof(Message)) != (ssize_t)sizeof(Message))
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	{
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		return 1;
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	}
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	return 0;
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}
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/***************************************************************************/
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UNS8 canSend_driver(CAN_HANDLE fd0, Message *m)
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{
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  int i;
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  printf("%x->[ ", (CANPipe*)fd0 - &canpipes[0]); 
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  for(i=0; i < MAX_NB_CAN_PIPES; i++)
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  {
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  	if(canpipes[i].used && &canpipes[i] != (CANPipe*)fd0)
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  	{
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		printf("%x ",i);	
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  	}
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  }
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  printf(" ]");	
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  print_message(m);
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  // Send to all readers, except myself
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  for(i=0; i < MAX_NB_CAN_PIPES; i++)
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  {
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  	if(canpipes[i].used && &canpipes[i] != (CANPipe*)fd0)
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  	{
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		write(canpipes[i].pipe[1], m, sizeof(Message));
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  	}
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  }
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  return 0;
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}
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/***************************************************************************/
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int TranslateBaudRate(char* optarg){
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	if(!strcmp( optarg, "1M")) return (int)1000;
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	if(!strcmp( optarg, "500K")) return (int)500;
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	if(!strcmp( optarg, "250K")) return (int)250;
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	if(!strcmp( optarg, "125K")) return (int)125;
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	if(!strcmp( optarg, "100K")) return (int)100;
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	if(!strcmp( optarg, "50K")) return (int)50;
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	if(!strcmp( optarg, "20K")) return (int)20;
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	if(!strcmp( optarg, "10K")) return (int)10;
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	if(!strcmp( optarg, "5K")) return (int)5;
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	if(!strcmp( optarg, "none")) return 0;
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	return 0x0000;
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}
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UNS8 canChangeBaudRate_driver( CAN_HANDLE fd0, char* baud)
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{
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    printf("%x-> changing to baud rate %s[%d]\n", (CANPipe*)fd0 - &canpipes[0],baud,TranslateBaudRate(baud)); 
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    return 0;
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}
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/***************************************************************************/
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CAN_HANDLE canOpen_driver(s_BOARD *board)
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{
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  int i;  
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  for(i=0; i < MAX_NB_CAN_PIPES; i++)
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  {
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  	if(!canpipes[i].used)
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	  	break;
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  }
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  /* Create the pipe.  */
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  if (i==MAX_NB_CAN_PIPES || pipe(canpipes[i].pipe))
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    {
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      fprintf (stderr, "Open failed.\n");
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      return (CAN_HANDLE)NULL;
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    }
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   canpipes[i].used = 1;
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   return (CAN_HANDLE) &canpipes[i];
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}
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/***************************************************************************/
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int canClose_driver(CAN_HANDLE fd0)
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{
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  close(((CANPipe*)fd0)->pipe[0]);
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  close(((CANPipe*)fd0)->pipe[1]);
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  ((CANPipe*)fd0)->used = 0;
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  return 0;
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}
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