/* HID Listen, http://www.pjrc.com/teensy/hid_listen.html
 * Listens (and prints) all communication received from a USB HID device,
 * which is useful for view debug messages from the Teensy USB Board.
 * Copyright 2008, PJRC.COM, LLC
 *
 * You may redistribute this program and/or modify it under the terms
 * of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see http://www.gnu.org/licenses/
 */

#include "rawhid.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include <time.h>

static void delay_ms(unsigned int msec);

int main(void) {
  char buf[64], *in, *out;
  rawhid_t *hid;
  int num, count;

  printf("Waiting for device:");
  fflush(stdout);
  while (1) {
    hid = rawhid_open_only1(0, 0, 0xFF31, 0x0074);
    if (hid == NULL) {
      printf(".");
      fflush(stdout);
      delay_ms(1000);
      continue;
    }
    printf("\nListening:\n");
    while (1) {
      num = rawhid_read(hid, buf, sizeof(buf), 200);
      if (num < 0)
        break;
      if (num == 0)
        continue;
      in = out = buf;
      for (count = 0; count < num; count++) {
        if (*in) {
          *out++ = *in;
        }
        in++;
      }
      count = out - buf;
      // printf("read %d bytes, %d actual\n", num, count);
      if (count) {
        struct timeval tv;
        time_t nowtime;
        struct tm *nowtm;
        char tmbuf[64];

        gettimeofday(&tv, NULL);
        nowtime = tv.tv_sec;
        nowtm = localtime(&nowtime);
        strftime(tmbuf, sizeof tmbuf, "%Y-%m-%d %H:%M:%S", nowtm);
        printf("%s.%06ld ", tmbuf, tv.tv_usec);

        num = fwrite(buf, 1, count, stdout);
        fflush(stdout);
      }
    }
    rawhid_close(hid);
    printf("\nDevice disconnected.\nWaiting for new device:");
  }
  return 0;
}

#if (defined(WIN32) || defined(WINDOWS) || defined(__WINDOWS__))
#include <windows.h>
static void delay_ms(unsigned int msec) { Sleep(msec); }
#else
#include <unistd.h>
static void delay_ms(unsigned int msec) { usleep(msec * 1000); }
#endif