#include <stdio.h>#include <stdlib.h>#include <fcntl.h>#include "can.h"#include <memory.h>int main(){int c0,c1;struct canmsg_t cd,cs;int cts = 10;c0=open("/dev/can0",O_RDWR);c1=open("/dev/can1",O_RDWR);if(c0<0||c1<0){  printf("error open can dev\n");  exit(0);}cs.length=8;cs.id=0;cs.data[0]=0;cs.data[1]=1;cs.data[2]=2;cs.data[3]=3;while( cts-- ){  memset(&cd,0,sizeof(cd));  write(c0,&cs,sizeof(cs));  usleep(1);  read(c1,&cd,1);  if(cd.data[0]!=0||cd.data[1]!=1||cd.data[2]!=2||cd.data[3]!=3)  {	printf("error in can\n");	exit(0);  }}close(c1);close(c0);printf("can test passed\n");exit(1);return 1;}