hidtest.c

   1 #include <stdio.h>
   2 #include <unistd.h>
   3 #include <stdlib.h>
   4 #include <fcntl.h>
   5 #include <sys/ioctl.h>
   6 #include <asm/types.h>
   7 #include <linux/hiddev.h>
   8
   9 static void die(char *x)
  10 {
  11         fprintf(stderr, "hidtest: %s: %m\n", x);
  12         exit(1);
  13 }
  14
  15 int main(void)
  16 {
  17         int i, j;
  18         int fd = open("/dev/usb/hiddev0", O_RDWR);
  19         if (fd < 0) die("open");
  20
  21         int ver;
  22         if (ioctl(fd, HIDIOCGVERSION, &ver) < 0)
  23                 die("getversion");
  24         printf("hiddev version %x\n", ver);
  25
  26         struct hiddev_devinfo di;
  27         if (ioctl(fd, HIDIOCGDEVINFO, &di) < 0)
  28                 die("gdevinfo");
  29         printf("%d:%d:%d vendor %04x, product %04x, version %04x, num_appl %d\n",
  30                 di.busnum, di.devnum, di.ifnum, di.vendor, di.product, di.version, di.num_applications);
  31
  32 #if 0
  33         for (i=0; i<100; i++) {
  34                 struct hiddev_string_descriptor ss;
  35                 ss.index = 0;
  36                 if (ioctl(fd, HIDIOCGSTRING, &ss) < 0)
  37                         printf("S%d: ???\n", i);
  38                 else
  39                         printf("S%d: %s\n", i, ss.value);
  40         }
  41 #endif
  42
  43         for (i=0; i<di.num_applications; i++) {
  44                 int appl = ioctl(fd, HIDIOCAPPLICATION, i);
  45                 if (appl < 0) die("application");
  46                 printf("Appl %d: %x\n", i, appl);
  47         }
  48
  49         //ioctl(fd, HIDIOCINITREPORT, 0);
  50
  51         struct hiddev_report_info rinfo;
  52         struct hiddev_field_info finfo;
  53         struct hiddev_usage_ref uref;
  54         rinfo.report_type = HID_REPORT_TYPE_INPUT;
  55         rinfo.report_id = HID_REPORT_ID_FIRST;
  56         int ret = ioctl(fd, HIDIOCGREPORTINFO, &rinfo);
  57         while (ret >= 0) {
  58                 printf("rinfo: type=%d, id=%d, fields=%d\n", rinfo.report_type, rinfo.report_id, rinfo.num_fields);
  59                 for (i = 0; i < rinfo.num_fields; i++) {
  60                         finfo.report_type = rinfo.report_type;
  61                         finfo.report_id = rinfo.report_id;
  62                         finfo.field_index = i;
  63                         ioctl(fd, HIDIOCGFIELDINFO, &finfo);
  64                         printf("\tField %d:\n", i);
  65                         printf("\t\tflags: %04x, phys: %d, log: %d, appl: %x, log=<%d,%d>, phys=<%d,%d>, unit=%d E%d\n",
  66                                 finfo.flags, finfo.physical, finfo.logical, finfo.application,
  67                                 finfo.logical_minimum, finfo.logical_maximum,
  68                                 finfo.physical_minimum, finfo.physical_maximum,
  69                                 finfo.unit, finfo.unit_exponent);
  70                         for (j = 0; j < finfo.maxusage; j++) {
  71                                 uref.report_type = finfo.report_type;
  72                                 uref.report_id = finfo.report_id;
  73                                 uref.field_index = i;
  74                                 uref.usage_index = j;
  75                                 ioctl(fd, HIDIOCGUCODE, &uref);
  76                                 ioctl(fd, HIDIOCGUSAGE, &uref);
  77                                 printf("\t\tUsage %d: code=%x, value=%d\n", j, uref.usage_code, uref.value);
  78                         }
  79                 }
  80                 rinfo.report_id |= HID_REPORT_ID_NEXT;          /* FIXME: bug in hiddev.h, beware */
  81                 ret = ioctl(fd, HIDIOCGREPORTINFO, &rinfo);
  82         }
  83
  84         int f = HIDDEV_FLAG_UREF;
  85         if (ioctl(fd, HIDIOCSFLAG, &f) < 0) die("sflag");
  86         struct hiddev_usage_ref ev;
  87         while (read(fd, &ev, sizeof(ev))) {
  88                 printf("EV: %x = %d\n", ev.usage_code, ev.value);
  89         }
  90
  91         return 0;
  92 }