transmit.c

can4linux-3.5.3.gz can4 linux

/*   Transmit sends a bunch of telegrams by filling them with       */
/*   different CANids and data bytes. You may send more than one    */
/*   telegram with write just by sending out an array of telegrams. */
 
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>

#include <can4linux.h>

#define STDDEV "can1"

int main(int argc,char **argv)
{
int fd;
int i, sent;
canmsg_t tx[256];
char device[40];

    if(argc == 2) {
	sprintf(device, "/dev/%s", argv[1]);
    }
    else {
	sprintf(device, "/dev/%s", STDDEV);
    }
    printf("using CAN device %s\n", device);
    
    if(( fd = open(device, O_RDWR )) < 0 ) {
	fprintf(stderr,"Error opening CAN device %s\n", device);
        exit(1);
    }

    for(i = 0; i < 16; i++) {
      sprintf( tx[i].data,"msg%d",i);
      printf("sending '%s'\n", tx[i].data );
      tx[i].flags = 0;  
      tx[i].length = strlen(tx[i].data);  
      tx[i].id=500 + i;

    }

    printf("fast xmit message\n");
    sent = write(fd, tx, 16 ); sleep(1);
    if(sent <= 0) {
	perror("sent");
    }
    close(fd);
    return 0;
}