/*   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;}