testing/bufconfig.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 int test_bufconfig_without_cmd(void);
  16 int test_bufconfig_with_cmd(void);
  17
  18 int test_bufconfig(void)
  19 {
  20         int flags;
  21
  22         flags = comedi_get_subdevice_flags(device,subdevice);
  23
  24         if(flags&SDF_CMD){
  25                 return test_bufconfig_with_cmd();
  26         }else{
  27                 return test_bufconfig_without_cmd();
  28         }
  29 }
  30
  31 int test_bufconfig_without_cmd(void)
  32 {
  33         int ret;
  34
  35         ret = comedi_get_buffer_size(device,subdevice);
  36         if(ret<0){
  37                 if(errno==ENODEV){
  38                         printf("got ENODEV, good\n");
  39                 }else{
  40                         printf("E: comedi_get_buffer_size: %s\n",
  41                                 strerror(errno));
  42                 }
  43         }else if(ret==0){
  44                 printf("buffer length is 0, good\n");
  45         }else{
  46                 printf("E: comedi_get_buffer_size returned %d\n",ret);
  47         }
  48
  49         return 0;
  50 }
  51
  52 int test_bufconfig_with_cmd(void)
  53 {
  54         int ret;
  55         int len;
  56         int maxlen;
  57
  58         ret = comedi_get_buffer_size(device,subdevice);
  59         if(ret<0){
  60                 printf("E: comedi_get_buffer_size: %s\n",strerror(errno));
  61         }else{
  62                 printf("buffer size %d\n",ret);
  63         }
  64
  65         maxlen = comedi_get_max_buffer_size(device,subdevice);
  66         if(maxlen<0){
  67                 printf("E: comedi_get_max_buffer_size: %s\n",strerror(errno));
  68         }else{
  69                 printf("max buffer size %d\n",maxlen);
  70         }
  71
  72         len=4096;
  73         printf("setting buffer size to %d\n",len);
  74         ret = comedi_set_buffer_size(device,subdevice,len);
  75         if(ret<0){
  76                 printf("E: comedi_set_buffer_size: %s\n",strerror(errno));
  77         }else{
  78                 printf("buffer size set to %d\n",ret);
  79         }
  80
  81         ret = comedi_get_buffer_size(device,subdevice);
  82         if(ret<0){
  83                 printf("E: comedi_get_buffer_size: %s\n",strerror(errno));
  84         }else{
  85                 printf("buffer size now at %d\n",ret);
  86                 if(ret != len){
  87                         printf("E: buffer size didn't get set: %d (expected %d)\n",
  88                                 ret,len);
  89                 }
  90         }
  91
  92         len=maxlen+4096;
  93         printf("setting buffer size past limit, %d\n",len);
  94         ret = comedi_set_buffer_size(device,subdevice,len);
  95         if(ret<0){
  96                 if(errno==EPERM){
  97                         printf("got EPERM, good\n");
  98                 }else{
  99                         printf("E: wrong error comedi_set_buffer_size: %s",
 100                                 strerror(errno));
 101                 }
 102         }else{
 103                 printf("E: comedi_set_buffer_size: didn't get error\n");
 104         }
 105
 106         len=maxlen;
 107         printf("setting buffer size to max, %d\n",len);
 108         ret = comedi_set_buffer_size(device,subdevice,len);
 109         if(ret<0){
 110                 printf("E: comedi_set_buffer_size: %s\n",strerror(errno));
 111         }else{
 112                 printf("buffer size now at %d\n",ret);
 113                 if(ret != len){
 114                         printf("E: buffer size didn't get set: %d (expected %d)\n",
 115                                 ret,len);
 116                 }
 117         }
 118
 119
 120         return 0;
 121 }
 122