demo/info.c

   1 /*
   2    This demo reads information about a comedi device and
   3    displays the information in a human-readable form.
   4  */
   5
   6 #include <stdio.h>
   7 #include <comedilib.h>
   8 #include <fcntl.h>
   9 #include <unistd.h>
  10 #include <stdlib.h>
  11 #include <errno.h>
  12 #include <string.h>
  13 #include "examples.h"
  14
  15 void get_command_stuff(comedi_t *it,int s);
  16
  17 void help(void)
  18 {
  19         fprintf(stderr,"info </dev/comediN>\n");
  20         exit(0);
  21 }
  22
  23 char *tobinary(char *s,int bits,int n);
  24
  25 char *subdevice_types[]={
  26         "unused",
  27         "analog input",
  28         "analog output",
  29         "digital input",
  30         "digital output",
  31         "digital I/O",
  32         "counter",
  33         "timer",
  34         "memory",
  35         "calibration",
  36         "processor",
  37         "serial digital I/O"
  38 };
  39
  40 comedi_t *it;
  41 extern char *filename;
  42
  43
  44 int main(int argc,char *argv[])
  45 {
  46         int i,j;
  47         int n_subdevices,type;
  48         int chan,n_chans;
  49         int n_ranges;
  50         int subdev_flags;
  51         comedi_range *rng;
  52
  53         parse_options(argc,argv);
  54
  55         it=comedi_open(filename);
  56         if(!it){
  57                 comedi_perror(filename);
  58                 exit(1);
  59         }
  60
  61         printf("overall info:\n");
  62         printf("  version code: 0x%06x\n",comedi_get_version_code(it));
  63         printf("  driver name: %s\n",comedi_get_driver_name(it));
  64         printf("  board name: %s\n",comedi_get_board_name(it));
  65         printf("  number of subdevices: %d\n",n_subdevices=comedi_get_n_subdevices(it));
  66
  67         for(i=0;i<n_subdevices;i++){
  68                 printf("subdevice %d:\n",i);
  69                 type=comedi_get_subdevice_type(it,i);
  70                 printf("  type: %d (%s)\n",type,subdevice_types[type]);
  71                 if(type==COMEDI_SUBD_UNUSED)
  72                         continue;
  73                 subdev_flags = comedi_get_subdevice_flags(it, i);
  74                 printf("  flags: 0x%08x\n",subdev_flags);
  75                 n_chans=comedi_get_n_channels(it,i);
  76                 printf("  number of channels: %d\n",n_chans);
  77                 if(!comedi_maxdata_is_chan_specific(it,i)){
  78                         printf("  max data value: %d\n",comedi_get_maxdata(it,i,0));
  79                 }else{
  80                         printf("  max data value: (channel specific)\n");
  81                         for(chan=0;chan<n_chans;chan++){
  82                                 printf("    chan%d: %d\n",chan,
  83                                         comedi_get_maxdata(it,i,chan));
  84                         }
  85                 }
  86                 printf("  ranges:\n");
  87                 if(!comedi_range_is_chan_specific(it,i)){
  88                         n_ranges=comedi_get_n_ranges(it,i,0);
  89                         printf("    all chans:");
  90                         for(j=0;j<n_ranges;j++){
  91                                 rng=comedi_get_range(it,i,0,j);
  92                                 printf(" [%g,%g]",rng->min,rng->max);
  93                         }
  94                         printf("\n");
  95                 }else{
  96                         for(chan=0;chan<n_chans;chan++){
  97                                 n_ranges=comedi_get_n_ranges(it,i,chan);
  98                                 printf("    chan%d:",chan);
  99                                 for(j=0;j<n_ranges;j++){
 100                                         rng=comedi_get_range(it,i,chan,j);
 101                                         printf(" [%g,%g]",rng->min,rng->max);
 102                                 }
 103                                 printf("\n");
 104                         }
 105                 }
 106                 printf("  command:\n");
 107                 get_command_stuff(it,i);
 108         }
 109
 110         return 0;
 111 }
 112
 113 char *tobinary(char *s,int bits,int n)
 114 {
 115         int bit=1<<n;
 116         char *t=s;
 117
 118         for(;bit;bit>>=1)
 119                 *t++=(bits&bit)?'1':'0';
 120         *t=0;
 121
 122         return s;
 123 }
 124
 125 void probe_max_1chan(comedi_t *it,int s);
 126
 127 void get_command_stuff(comedi_t *it,int s)
 128 {
 129         comedi_cmd cmd;
 130         char buf[100];
 131
 132         if(comedi_get_cmd_src_mask(it,s,&cmd)<0){
 133                 printf("    not supported\n");
 134         }else{
 135                 printf("    start: %s\n",cmd_src(cmd.start_src,buf));
 136                 printf("    scan_begin: %s\n",cmd_src(cmd.scan_begin_src,buf));
 137                 printf("    convert: %s\n",cmd_src(cmd.convert_src,buf));
 138                 printf("    scan_end: %s\n",cmd_src(cmd.scan_end_src,buf));
 139                 printf("    stop: %s\n",cmd_src(cmd.stop_src,buf));
 140
 141                 probe_max_1chan(it,s);
 142         }
 143 }
 144
 145 void probe_max_1chan(comedi_t *it,int s)
 146 {
 147         comedi_cmd cmd;
 148         char buf[100];
 149
 150         printf("  command fast 1chan:\n");
 151         if(comedi_get_cmd_generic_timed(it,s,&cmd,1)<0){
 152                 printf("    not supported\n");
 153         }else{
 154                 printf("    start: %s %d\n",
 155                         cmd_src(cmd.start_src,buf),cmd.start_arg);
 156                 printf("    scan_begin: %s %d\n",
 157                         cmd_src(cmd.scan_begin_src,buf),cmd.scan_begin_arg);
 158                 printf("    convert: %s %d\n",
 159                         cmd_src(cmd.convert_src,buf),cmd.convert_arg);
 160                 printf("    scan_end: %s %d\n",
 161                         cmd_src(cmd.scan_end_src,buf),cmd.scan_end_arg);
 162                 printf("    stop: %s %d\n",
 163                         cmd_src(cmd.stop_src,buf),cmd.stop_arg);
 164         }
 165 }
 166