Christie LW400 Manuel utilisateur

NetLinx Module Interface Specification

for a

Christie Digital

LW400 Projector

Also works with LX501/LW401/LWU421/

LX601i/LW551i/LWU501i

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TABLE OF CONTENTS

Introduction................................................................................................................................................3

Overview....................................................................................................................................................3

Implementation ..........................................................................................................................................3

Channels.....................................................................................................................................................4

Levels.........................................................................................................................................................4

Command Interface....................................................................................................................................6

String Feedback..........................................................................................................................................8

Device Notes..............................................................................................................................................9

Programming Notes ...................................................................................................................................9

Adding Functions to Modules....................................................................................................................9

Commands to the device........................................................................................................................9

Additional Feedback from the device..................................................................................................10

Revision History

Date

Initials

Comments

3-14-2010

Initial release

6-4-2013

IP control –additional models –other minor updates

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Introduction

This is a reference manual to describe the interface provided between an AMX NetLinx system and a

Christie Digital LW400 projector. The required communication settings are a baud rate of 19200, 8 data

bits, 1 stop bit, no parity, and handshaking off.

Overview

The COMM module translates between the standard interface described below and the LW400 serial

protocol. It parses the buffer for responses from the LW400, sends strings to control the LW400, and

receives commands from the UI module or telnet sessions.

A User Interface (UI) module is also provided. This module uses the standard interface described below

and parses the string responses for feedback.

The following diagram gives a graphical view of the interface between the interface code and the NetLinx

module.

Implementation

To interface to the LW400 module, the programmer must perform the following steps:

1. Define the device ID for the LW400 that will be controlled.

2. Define the virtual device ID that the LW400 COMM module will use to communicate with the

main program and User Interface. NetLinx virtual devices start with device number 33001.

3. The NetLinx LW400 module must be included in the program with a DEFINE_MODULE

command. This command starts execution of the module and passes in the following key

information: the device ID of the LW400 to be controlled, and the virtual device ID for

communicating to the main program.

An example of how to do this is shown below.

LW400

NetLinx

COMM

Module

NetLinx

Main

Program

Virtual

Device

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DEFINE_DEVICE

dvLW400 = 5001:1:0 // The LW400 connected to the NetLinx on 1st RS-232 port

dvLW400 = 0:3:0 // The P_SERIES connected to the NetLinx via IP

dvLW400 TPl = 10001:1:0 // The touch panel used for output

vdvLW400 = 33001:1:0 // The virtual device use for communication between the

// Comm module interface and User_Interface (UI) module interface

DEFINE_START // Place define_module calls to the very end of the define_start section.

// Comm module

DEFINE_MODULE 'Christie Digital_LW400_Comm' mdlLW400_APP(vdvLW400, dvLW400)

Upon initialization the AMX Commmodule will communicate with the Christie Digital LW400 and

information will be exchanged.

Channels

The channels supported by the COMM module are listed below. These channels are associated with the

virtual device(s) and are independent of the channels associated with the touch panel device.

Note: An ‘*’ indicates an extension to the standard API.

Channel

Description

251

This channel is used for feedback only.

ON: Device is online.

OFF: Device is offline.

255

This channel is used for feedback only.

ON: POWER is ON.

OFF: POWER is OFF

Levels

The Main Program controls the video projector via level events (NetLinx command send_level) sent to

the COMM module. The levels supported by the COMM module are listed below. These levels are

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associated with the virtual device(s) and are independent of the levels associated with the touch panel

device.

Level

Description

Lamp-Hours used

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Command Interface

The UI module controls the LW400 via command events (NetLinx command send_command) sent to the

COMM module. The commands supported by the COMM module are listed below.

NOTE: AMX has not defined a standard API for LW400 devices.

Command

Description

ADDRESS=<value>

Sets the IP address for the projector

<value>: valid IP address

ADDRESS=192.168.1.200

ASPECT=<value>

Sets the current aspect ratio.

<value>: 1 = Normal (All modes)

2 = Wide (All modes)

ASPECT=2: Turn aspect mode to Wide.

ASPECT?

Request for current aspect ratio.

ASPECT?

AUTO=<value>

Auto-adjust PC image

<value>: 1 = Execute Auto-Adjust

DEBUG=<state>

Set the debug state

<state> : 0 OFF

1 ON

DEBUG=1

DEBUG?

Request the debug state.

DEBUG?

INPUT=<value>

Selects the input source.

<value> : 1 = HDMI

2 = RGB1

3 = RGB2

4 = VIDEO

5 = S-VIDEO

6 = COMPONENT

INPUT=3

INPUT?

Request the current input setting.

INPUT?

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PASSTHRU=<string>

Allows user the capability of sending commands

directly to the LW400 without processing by the

NetLinx module. User must be aware of the protocol

implemented by the unit to use this command. This

gives the user access to features which may not be

directly supported by the module. See “Adding

Functions to Modules” section at the end of this

document for more information.

The COMM module automatically adds the required

checksum to the command string.

<string> : string to send to unit

PASSTHRU=RVER

POWER=<state>

Sets the power state.

<state> : 0 = off

1 = on

POWER=0

POWER?

Request the current power setting.

POWER?

REINIT=<value>

Reinitialize communications with the projector

<value> : 1 = re-establish IP communication

REINIT=1

VERSION?

Request the current version number of the NetLinx

module.

VERSION?

Table 1 –Send Command Definitions

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String Feedback

The NetLinx COMM module provides feedback to the User Interface module for LW400 changes via

string events. The strings supported are listed below.

String

Description

ASPECT=<value>

Reports the current aspect ratio.

<value>: 1 = Normal (All modes)

2 = Wide (All modes)

ASPECT=2:

INPUT=<value>

Reports the input source.

<value> : 1 = HDMI

2 = RGB1

3 = RGB2

4 = VIDEO

5 = S-VIDEO

6 = COMPONENT

INPUT=3

LAMPTIME=<value>

Reports lamp usage in hours. (Updated every 5 minutes).

Also available as level 1.

POWER=<value>

Reports the power status.

<value> : 0 power is off

1power is on

2cooldown

VERSION=<version>

Reports the current version number of the NetLinx

module.

<value> : current version number in xx.yy format

VERSION=1.06

Table 2 - String Feedback Definitions

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Device Notes

Commands implemented by this interface include those that are commonly used and shared between

various LW400 devices. Several of the LW400 commands have been omitted and may be executed using

the PASSTHRU command.

A periodic poll will return the power state and the total number of hours used by the device. Should the

LW400 shift into sleep mode, it will be automatically shifted back into power-on mode.

Programming Notes

The COMM module imposes synchronous operation i.e. the COMM will not send a command to the

LW400 until it has gotten a response or a timeout from the previous command.

A queue is implemented so that the commands from can be stacked. Commands are pulled off the queue

(1) when a reply is received or, (2) after the reply timer times out (200 milliseconds). The device is

polled every 10 seconds to return the power state and the input selected.

The Request commands return the state that is currently stored in the COMM module. They do

NOT send a new Request to the device. The COMM module states are updated either by the periodic

poll or by the enforced feedback. When a state changes, the UI is automatically informed.

Adding Functions to Modules

Commands to the device

This module supplies a mechanism to allow additional device features to be added to software using the

module. This is the PASSTHRU command, which allows protocol strings to be passed through the

module. The device-specific protocol must be known in order to use this feature.

As an example, suppose that a module for a projector has not implemented the 'white balance adjustment'

feature. The command that the projector protocol requires is 03H, 10H, 05H, 14H, followed by a

checksum. The documentation for the PASSTHRU command specifies that the module will

automatically generate the checksum. In this case, the following string should be sent from

the UI code to implement 'white balance adjustment'.

send_command vdvDevice,"'PASSTHRU=',$03,$10,$05,$14"

The reason to use PASSTHRU instead of sending a protocol string directly to the device port is that the

device may require command queuing, calculation of checksums, or other internal processing, which

would not be done if the string was sent directly. Because of this, it is best to filter all communication TO

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the device through the module. (The module documentation will indicate any processing that will be

automatically done to the PASSTHRU string like checksum calculation.)

Additional Feedback from the device

The module documentation indicates what feedback is provided. If additional feedback is required, a

CREATE_BUFFER for the device must be implemented in the user code to process the strings from the

device manually. Note that the module will still be processing the response strings independently

and sending the interpreted feedback up to the user code.

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