testing/inttrig.c

   1
   2 #include <stdio.h>
   3 #include <comedilib.h>
   4 #include <fcntl.h>
   5 #include <unistd.h>
   6 #include <sys/ioctl.h>
   7 #include <errno.h>
   8 #include <getopt.h>
   9 #include <ctype.h>
  10 #include <math.h>
  11 #include <sys/time.h>
  12 #include <string.h>
  13 #include "comedi_test.h"
  14
  15 #define BUFSZ 2000
  16
  17 int test_cmd_start_inttrig(void)
  18 {
  19         comedi_cmd cmd;
  20         char buf[BUFSZ];
  21         unsigned int chanlist[1];
  22         int go;
  23         int total=0;
  24         int ret;
  25         unsigned int flags;
  26
  27         flags = comedi_get_subdevice_flags(device,subdevice);
  28         if(!(flags&SDF_CMD) || (comedi_get_read_subdevice(device)!=subdevice)){
  29                 printf("not applicable\n");
  30                 return 0;
  31         }
  32
  33         if(comedi_get_cmd_src_mask(device,subdevice,&cmd)<0){
  34                 printf("  not supported\n");
  35                 return 0;
  36         }
  37
  38         if(!(cmd.start_src&TRIG_INT)){
  39                 printf("  not supported\n");
  40                 return 0;
  41         }
  42
  43         if(comedi_get_cmd_generic_timed(device, subdevice, &cmd, 1, 1)<0){
  44                 printf("  not supported\n");
  45                 return 0;
  46         }
  47
  48         if(realtime)cmd.flags |= TRIG_RT;
  49         cmd.chanlist = chanlist;
  50         cmd.start_src = TRIG_INT;
  51         cmd.start_arg = 0;
  52         cmd.scan_end_arg = 1;
  53         cmd.stop_arg = 100;
  54         cmd.chanlist_len = 1;
  55         chanlist[0] = CR_PACK(0,0,0);
  56
  57         ret = comedi_command(device,&cmd);
  58         if(ret!=0){
  59                 printf("E: comedi_command() returned %d, expecting 0\n",ret);
  60         }
  61
  62         ret = comedi_internal_trigger(device,subdevice,0);
  63         if(ret<0){
  64                 printf("E: comedi_internal_trigger(): %s\n",strerror(errno));
  65         }
  66
  67         go=1;
  68         while(go){
  69                 ret = read(comedi_fileno(device),buf,BUFSZ);
  70                 if(ret<0){
  71                         if(errno==EAGAIN){
  72                                 usleep(10000);
  73                         }else{
  74                                 go = 0;
  75                                 printf("E: read: %s\n",strerror(errno));
  76                         }
  77                 }else if(ret==0){
  78                         go = 0;
  79                 }else{
  80                         total += ret;
  81                         if(verbose)
  82                                 printf("read %d %d\n",ret,total);
  83                 }
  84         }
  85
  86         return 0;
  87 }
  88
  89