sw/src/omni_usb/checkout.c

   1
   2 #include <stdio.h>
   3 #include <fcntl.h>
   4 #include <stdlib.h>
   5 #include <stdint.h>
   6
   7 int main (int argc, char ** args){
   8   int fd;
   9
  10   fd=open("/dev/ttyUSB0", O_RDWR);
  11   if (fd<0) {
  12     perror("While opening port");
  13     exit(2);
  14   }
  15
  16   int i=0;
  17   for (i=0; i<0x1000;i++){
  18     char t1,t2,t3;
  19     t1=i&0xff;
  20     int ret=write(fd,&t1,1);
  21     if (ret!=1) {
  22       perror("While writing to port");
  23       exit(2);
  24     }
  25     if (i%77==0) usleep(5000);
  26     if (i%355==0) usleep(50000);
  27     ret=read(fd,&t2,1);
  28     if (ret!=1) {
  29       perror("While reading from port");
  30       exit(2);
  31     }
  32     ret=read(fd,&t3,1);
  33     if (ret!=1) {
  34       perror("While reading from port");
  35       exit(2);
  36     }
  37
  38     t3=~t3;
  39     if ((t1!=t2)||(t3!=t1)){
  40       fprintf(stderr,"Data mismatch!!!\n");
  41       fprintf(stderr,"T1: %03o T2: %03o T3: %03o\n",t1,t2,t3);
  42       exit(3);
  43     }
  44   }
  45
  46   printf("Success.\n");
  47
  48   return 0;
  49 }