/usr/share/doc/libcomedi-dev/demo/info.c is in libcomedi-dev 0.10.2-4+b3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 | /*
This demo reads information about a comedi device and
displays the information in a human-readable form.
*/
#include <stdio.h>
#include <comedilib.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include "examples.h"
void get_command_stuff(comedi_t *it,int s);
void help(void)
{
fprintf(stderr,"info </dev/comediN>\n");
exit(0);
}
char *tobinary(char *s,int bits,int n);
static const char * const subdevice_types[]={
"unused",
"analog input",
"analog output",
"digital input",
"digital output",
"digital I/O",
"counter",
"timer",
"memory",
"calibration",
"processor",
"serial digital I/O",
"pwm"
};
comedi_t *it;
extern char *filename;
int main(int argc,char *argv[])
{
int i,j;
int n_subdevices,type;
const char *type_str;
int chan,n_chans;
int n_ranges;
int subdev_flags;
comedi_range *rng;
struct parsed_options options;
init_parsed_options(&options);
parse_options(&options, argc, argv);
it = comedi_open(options.filename);
if(!it){
comedi_perror(options.filename);
exit(1);
}
printf("overall info:\n");
printf(" version code: 0x%06x\n", comedi_get_version_code(it));
printf(" driver name: %s\n", comedi_get_driver_name(it));
printf(" board name: %s\n", comedi_get_board_name(it));
printf(" number of subdevices: %d\n", n_subdevices = comedi_get_n_subdevices(it));
for(i = 0; i < n_subdevices; i++){
printf("subdevice %d:\n",i);
type = comedi_get_subdevice_type(it, i);
if(type < (int)(sizeof(subdevice_types) / sizeof(subdevice_types[0]))){
type_str = subdevice_types[type];
}else{
type_str = "UNKNOWN";
}
printf(" type: %d (%s)\n",type,type_str);
if(type==COMEDI_SUBD_UNUSED)
continue;
subdev_flags = comedi_get_subdevice_flags(it, i);
printf(" flags: 0x%08x\n",subdev_flags);
n_chans=comedi_get_n_channels(it,i);
printf(" number of channels: %d\n",n_chans);
if(!comedi_maxdata_is_chan_specific(it,i)){
printf(" max data value: %lu\n", (unsigned long)comedi_get_maxdata(it,i,0));
}else{
printf(" max data value: (channel specific)\n");
for(chan=0;chan<n_chans;chan++){
printf(" chan%d: %lu\n",chan,
(unsigned long)comedi_get_maxdata(it,i,chan));
}
}
printf(" ranges:\n");
if(!comedi_range_is_chan_specific(it,i)){
n_ranges=comedi_get_n_ranges(it,i,0);
printf(" all chans:");
for(j=0;j<n_ranges;j++){
rng=comedi_get_range(it,i,0,j);
printf(" [%g,%g]",rng->min,rng->max);
}
printf("\n");
}else{
for(chan=0;chan<n_chans;chan++){
n_ranges=comedi_get_n_ranges(it,i,chan);
printf(" chan%d:",chan);
for(j=0;j<n_ranges;j++){
rng=comedi_get_range(it,i,chan,j);
printf(" [%g,%g]",rng->min,rng->max);
}
printf("\n");
}
}
printf(" command:\n");
get_command_stuff(it,i);
}
return 0;
}
char *tobinary(char *s,int bits,int n)
{
int bit=1<<n;
char *t=s;
for(;bit;bit>>=1)
*t++=(bits&bit)?'1':'0';
*t=0;
return s;
}
void probe_max_1chan(comedi_t *it,int s);
void get_command_stuff(comedi_t *it,int s)
{
comedi_cmd cmd;
char buf[100];
if(comedi_get_cmd_src_mask(it,s,&cmd)<0){
printf(" not supported\n");
}else{
printf(" start: %s\n",cmd_src(cmd.start_src,buf));
printf(" scan_begin: %s\n",cmd_src(cmd.scan_begin_src,buf));
printf(" convert: %s\n",cmd_src(cmd.convert_src,buf));
printf(" scan_end: %s\n",cmd_src(cmd.scan_end_src,buf));
printf(" stop: %s\n",cmd_src(cmd.stop_src,buf));
probe_max_1chan(it,s);
}
}
void probe_max_1chan(comedi_t *it,int s)
{
comedi_cmd cmd;
char buf[100];
printf(" command fast 1chan:\n");
if(comedi_get_cmd_generic_timed(it, s, &cmd, 1, 1)<0){
printf(" not supported\n");
}else{
printf(" start: %s %d\n",
cmd_src(cmd.start_src,buf),cmd.start_arg);
printf(" scan_begin: %s %d\n",
cmd_src(cmd.scan_begin_src,buf),cmd.scan_begin_arg);
printf(" convert: %s %d\n",
cmd_src(cmd.convert_src,buf),cmd.convert_arg);
printf(" scan_end: %s %d\n",
cmd_src(cmd.scan_end_src,buf),cmd.scan_end_arg);
printf(" stop: %s %d\n",
cmd_src(cmd.stop_src,buf),cmd.stop_arg);
}
}
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