lirc测试遥控代码

1,  Reboot the box.

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2,  insmod /opt/lib/modules/2.6.34/extra/lirc_dev.ko

 insmod /opt/lib/modules/2.6.34/extra/lnxplatLirc.ko

3, Enter /opt/bin and run irrecord,  ./irrecord -d /dev/lirc0 --disable-namespace new.conf

4, Register ‘power’ key, ‘1’ key and ‘2’ key.

5, cp new.conf /etc/ lircd.conf

6, Run lircd with command  ./lircd --listen=5177 --device=/dev/lirc0 -n &

7, Enter /opt/bin and run irw

8, Test the registered key.

但是SEJIN的协议仍然有点小问题，就是第一次按键往往都检测不到，有时候要连续按几次才能检测到一次

查看代码，发现SEJIN和NEC的区别只是采样时钟的定义不同：

#if (REMOTE_PROTOCOL == REMOTE_PROTOCOL_SEJIN)
  #define IRRX_CLK_CTRL      55
  #define IR_FILTER_VALUE    0x320
#else
 /* NEC RC5 */
  #define IRRX_CLK_CTRL  (((CRYSTAL_FREQUENCY / (16 * 38222 )) - 1)/8)
  #define IR_FILTER_VALUE ((CRYSTAL_FREQUENCY /  1000000 )* 400 )
#endif
NEC的频率应该是38KHz，所以改为38000，然后再用irrecord

Press RETURN now to start recording.
................................................................................
Found const length: 352410
Please keep on pressing buttons like described above.
................................................................................
Space/pulse encoded remote control found.
Signal length is 67.
Found possible header: 45585 22623
Found trail pulse: 3033
Found repeat code: 45585 11230
Signals are space encoded.
Signal length is 32
Now enter the names for the buttons.

生成文件如下：
# Please make this file available to others
# by sending it to
#
# this config file was automatically generated
# using lirc-0.8.7(default) on Wed Dec 31 17:06:14 1969
#
# contributed by
#
# brand:                       new.conf
# model no. of remote control:
# devices being controlled by this remote:
#

begin remote

  name  new.conf
  bits           32
  flags SPACE_ENC|CONST_LENGTH
  eps            30
  aeps          100

  header      45585 22623
  one          3033  8297
  zero         3033  2631
  ptrail       3033
  repeat      45585 11230
  gap          352410
  toggle_bit_mask 0x0

      begin codes
      end codes

end remote

头基本上都对了，具体键值，可用打印的办法测出

# Please make this file available to others
# by sending it to
#
# this config file was automatically generated
# using lirc-0.8.7(default) on Wed Dec 31 17:06:20 1969
#
# contributed by
#
# brand:                       new.conf
# model no. of remote control:
# devices being controlled by this remote:
#

begin remote

  name  new.conf
  bits           16
  flags SPACE_ENC|CONST_LENGTH
  eps            30
  aeps          100

  header      45566 22645
  one          3005  8325
  zero         3005  2661
  ptrail       3007
  repeat      45566 11247
  pre_data_bits   16
  pre_data       0x608f
  gap          352399
  toggle_bit_mask 0x0

      begin codes
      KEY_0                        0x00FF
      KEY_1                        0x807F
      KEY_2                        0x40BF
      KEY_3                        0xC03F
      KEY_4                        0x20DF
      KEY_5                        0xA05F
      KEY_6                        0x609F
      KEY_7                        0xE01F
      KEY_8                        0x10EF
      KEY_9                        0x906F
      KEY_SWITCHVIDEOMODE          0x14EB
      KEY_KBDILLUMTOGGLE           0xF807
      KEY_CHANNELUP                  0x23DC
      KEY_CHANNELDOWN                0xA35C
      KEY_VOLUMEUP                   0x639C
      KEY_VOLUMEDOWN                 0xE31C
      KEY_POWER                    0xD02F
      KEY_MUTE                     0x28D7
      KEY_CHANNEL                  0x30CF
      KEY_MENU                     0xCC33
      KEY_FAVORITES                0xE41B
      KEY_HOME                     0x708F
      KEY_BACK                     0x946B
      KEY_ENTER                       0xA857
      KEY_UP                       0x38C7
      KEY_LEFT                     0xB04F
      KEY_RIGHT                    0xB847
      KEY_DOWN                     0x7887 
      KEY_STOP                     0x58A7 
      KEY_PLAY                     0xD827 
      KEY_REWIND                   0x08F7
      KEY_FORWARD                  0x48B7
      KEY_DELETE                   0x44BB
      KEY_PAGEUP                  0xE817
      KEY_PAGEDOWN                0x50AF
      LOCAL                       0x4CB3
      KEY_F1                      0x847B
      KEY_F2                      0x9867 
      KEY_F3                      0x18E7 
      KEY_F4                      0x04FB
      KEY_RED                       0x649B
      KEY_GREEN                       0xA45B
      KEY_YELLOW                       0x24DB
      KEY_BLUE                       0xC43B         
      end codes

end remote

如果发现有些键值irw能接收到，但是input系统没有收到：

lircd.c
int setup_uinputfd(const char *name)
{
#if defined(__linux__)
 int fd;
 int key;
 struct uinput_user_dev dev;
 
 fd = open("/dev/input/uinput", O_RDWR);
 if(fd == -1)
 {
  fd = open("/dev/uinput", O_RDWR);
  if(fd == -1)
  {
   fd = open("/dev/misc/uinput", O_RDWR);
   if(fd == -1)
   {
    fprintf(stderr, "could not open %s\n",
     "uinput");
    perror(NULL);
    return -1;
   }
  }
 }
 memset(&dev, 0, sizeof(dev));
 strncpy(dev.name, name, sizeof(dev.name));
 dev.name[sizeof(dev.name)-1] = 0;
 if(write(fd, &dev, sizeof(dev)) != sizeof(dev) ||
    ioctl(fd, UI_SET_EVBIT, EV_KEY) != 0 )/*||
    ioctl(fd, UI_SET_EVBIT, EV_REP) != 0) */
 {
  goto setup_error;
 }

        for(key = KEY_RESERVED; key <= KEY_UNKNOWN; key++)
 {
                if(ioctl(fd, UI_SET_KEYBIT, key) != 0)
  {
   goto setup_error;
                }
 }

 if(ioctl(fd, UI_DEV_CREATE) != 0)
 {
  goto setup_error;
 }
 return fd;
 
 setup_error:
 fprintf(stderr, "could not setup %s\n", "uinput");
 perror(NULL);
 close(fd);
#endif
 return -1;
}
 由于在input_map.inc
{"KEY_UNKNOWN", 240},

所以大于240(0xF0)的键都被屏蔽掉了