Leyard Tocuhboards Planar UltraRes Series, Руководство пользователя

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IR Command Protocol
Planar UltraRes Series User Manual 33
IR Command Protocol
The Planar UltraRes displays accept commands in the form of IR signals that conform
to the NEC protocol. Each Planar UltraRes remote control has an NEC control code
associated with it. You can use these codes to program a third-party “universal”
remote control to work with the Planar UltraRes displays. These third-party products
usually come with a computer software application for this purpose. For more
information, consult the documentation provided with the remote control.
The IR control codes have the following characteristics:
• Each code consists of the following:
• A leader pulse (a modulated pulse of 9 ms followed by a non-modulated
pulse of 4.5 ms)
• 16 address bits. The default address is 1785 (0x06F9, binary 00000110
11111001)
• 16 data bits: eight (8) bits for the command followed by the logical inverse
of the command
• An end pulse (a modulated pulse of 0.56 ms, similar to the modulated
pulse in the ‘0’ and ‘1’ bits). The end of the modulated pulse constitutes the
end of the data transmission.
• The carrier frequency is 38 kHz, with the modulated pulses having a 33% duty
cycle.
• Commands are sent at a maximum rate of 9 Hz.
For example, below is the NEC control code for the ON button of the Planar UltraRes
remote control (assuming the default address is used).
The following example shows the pulse train for this command.
Hex 06 F9 01 FE
Binary
00000110 11111001 00000001 11111110
Function Address Byte 1 Address Byte 2 Command
Command (Logical
Inverse)
Leader Pulse
0 0 0 0 0 0 1 1 9 ms 4.5 ms
Address Byt e 1 Address Byte 2 Command Byte Command Byte (logical inverse)
0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1
En
d
P
u
ls
e
13.5 ms 27 ms 27 ms