Leema-acoustics Tucana Handbook - What Is Lips?
The following section is intended for installers, system integrators and third party manufacturers.
What is LIPS?
LIPS or Leema Intelligent Protocol System, facilitates communication between various items in a Leema audio system. It allows
units such as Tucana, to control other items in a chain. Leema’s 5.2 surround system is a good example, where a Tucana
controls a Hydra and Corvus. Key information including volume level, input selection and power control is passed through the
bus enabling other units to operate in synchronisation. Intelligence is added within each receiving unit, for example, a Hydra
installed as part of a surround system ‘knows’ that it won’t be required when listening to a stereo source such as CD. Therefore,
when the Hydra ‘sees’ the CD input, it powers itself down.
Each Leema unit can be controlled via the LIPS bus. Controlling a Tucana externally for example, enables it to be used within a
home automation system.
LIPS Specifics
The LIPS bus is driven by an open-drain output. Leema can supply interface modules as required. The communication standard
follows the common RS232 format of No Parity, 8 data bits and 1 stop bit. The baud rate is 38400.
LIPS Packets
Each communication on the LIPS bus contains a packet of four data bytes as follows:
First a header is sent with a value of 255. This alerts the receivers to incoming data.
Next, a command header is sent. For a volume command, this would be 40. (see below for details).
Next, a value relating to the command is sent. For volume this would be 0 to 248.
Finally a tail byte is sent with a value of 0.
LIPS
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LIPS Protocol Headers For further information, please contact Leema Technical Support.
Value = 20 ID header. This header is private and must not be issued by any controlling software.
Value = 30 This is a general command header. The command values are as follows:
10 = Infra Red control OFF. These commands control the local IR receiver
20 = Infra Red control ON.
100 = Power ON.
101 = Power OFF.
103 = Select Input CD
104 = Select Input TUNER
105 = Select Input AUX
106 = Select Input MULTI 1
107 = Select Input MULTI 2
108 = Select Input AV DIRECT
109 = Select Input TAPE
110 = LED ring ON
111 = LED ring OFF
Value = 40 Volume header. Valid command values are 0(mute) to 248(maximum volume)
Value = 50 Serial Pass Through. When a Tucana, Hydra or Corvus receives this header, the header and value are passed on up
the bus. This enables future expansion options.
Value = 60 This is issued by Corvus. The command value contains the sub filter frequency.
Value = 70 As 60. The command value contains the sub filter slope.
Value = 80 As 60. The command value contains the extract status.
Value = 90 Spare header for future use.
Value = 100 Spare header for future use.
LIPS
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