如何控制USB HID 设备

  发送命令:Byte 0: 0x02
             Byte 1: 0x13

==========windows成功代码参考===============
       CHAR       OutputReport[2];
       OutputReport[0]=0x02;
       if (check3==1){//表示锁定
       OutputReport[1]=0x14;
       }else{
       OutputReport[1]=0x13;
       }
 
       DWORD       BytesWritten = 0;
       ULONG       Result;
        Result = WriteFile \
              (DeviceHandle, \
              OutputReport, \
              Capabilities.OutputReportByteLength, \
              &BytesWritten, \
              NULL);
=========linux代码如何写,下面是我未完成的,不知道怎么写了书(参考代码: http://www.frogmouth.net/hid-doco/examples/hiddev-misc/write-events.c ) ====

#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <asm/types.h>
#include <sys/signal.h>
#include <linux/hiddev.h>
int main (int argc, char **argv) {
  int fd = -1;
  int rd;
  int w;
  unsigned int i, alv, yalv;
  struct hiddev_devinfo device_info;
  struct hiddev_report_info rep_info;
  struct hiddev_field_info field_info;
  struct hiddev_usage_ref usage_ref;
  struct hiddev_event ev[64];
  fd_set fdset;
  int report_type;
  int appl;
  int version;
 
 
  if ((fd = open("/dev/usb/hiddev0", O_RDONLY)) < 0) {
    printf("hiddev open error \n");
    exit(1);
  }else{
    printf("hiddev open ok \n");
  }
  printf("HID_REPORT_TYPE_OUTPUT %d \n",HID_REPORT_TYPE_OUTPUT);


  usage_ref.report_type = HID_REPORT_TYPE_OUTPUT;
  usage_ref.report_id = 2;
  usage_ref.field_index = 1;
  usage_ref.usage_index = 0; /* which LED 0 is num lock, 1 is caps lock, 2 is scroll lock */
  usage_ref.usage_code = 27; /* no one cares? */
  usage_ref.value = 1; /* binary on (1)  or off (0) */
  w=ioctl(fd, HIDIOCSUSAGE, &usage_ref);

  printf("w=%d \n",w);
  rep_info.report_type = HID_REPORT_TYPE_OUTPUT;
  rep_info.report_id = 0x02;
  rep_info.num_fields = 0x13;
  w=ioctl(fd, HIDIOCSREPORT, &rep_info);
  printf("w=%d \n",w);
  close(fd);
  exit(0);

}