drivers/can_virtual/can_virtual.c
author etisserant
Fri, 08 Jun 2007 14:41:39 +0200
changeset 218 3bc225b6fb43
parent 193 0487270d441c
child 301 f4b64aa848e1
permissions -rw-r--r--
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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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#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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#define MyCase(fc) case fc: printf(#fc);break;
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void print_message(Message *m)
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{
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	int i;
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	switch(m->cob_id.w >> 7)
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	{
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		MyCase(SYNC)
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		MyCase(TIME_STAMP)
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		MyCase(PDO1tx)
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		MyCase(PDO1rx)
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		MyCase(PDO2tx)
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		MyCase(PDO2rx)
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		MyCase(PDO3tx)
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		MyCase(PDO3rx)
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		MyCase(PDO4tx)
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		MyCase(PDO4rx)
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		MyCase(SDOtx)
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		MyCase(SDOrx)
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		MyCase(NODE_GUARD)
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		MyCase(NMT)
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	}
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	printf(" rtr:%d", m->rtr);
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	printf(" len:%d", m->len);
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	for (i = 0 ; i < m->len ; i++)
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		printf(" %02x", m->data[i]);
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	printf("\n");
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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 TranslateBaudeRate(char* optarg){
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	if(!strcmp( optarg, "1M")) return 1000;
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	if(!strcmp( optarg, "500K")) return 500;
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	if(!strcmp( optarg, "250K")) return 250;
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	if(!strcmp( optarg, "125K")) return 125;
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	if(!strcmp( optarg, "100K")) return 100;
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	if(!strcmp( optarg, "50K")) return 50;
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	if(!strcmp( optarg, "20K")) return 20;
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	if(!strcmp( optarg, "10K")) return 10;
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	if(!strcmp( optarg, "5K")) return 5;
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	if(!strcmp( optarg, "none")) return 0;
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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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