AMX CAFE DUET STANDARD NETLINX API (SNAPI)... Manuel utilisateur

Standard NetLinx API

(SNAPI) R 1.8.0

Devices

instruction manual

last revision: 8-29-06

Document ID: 033-004-2994

AMX Limited Warranty and Disclaimer

AMX Corporation warrants its products to be free of defects in material and workmanship under normal use for three (3) years from the date of purchase from

AMX Corporation, with the following exceptions:

• Electroluminescent and LCD Control Panels are warranted for three (3) years, except for the display and touch overlay components that are warranted for a

period of one (1) year.

• Disk drive mechanisms, pan/tilt heads, power supplies, MX Series products, and KC Series products are warranted for a period of one (1) year.

• Unless otherwise specified, OEM and custom products are warranted for a period of one (1) year.

• Software is warranted for a period of ninety (90) days.

• Batteries and incandescent lamps are not covered under the warranty.

This warranty extends only to products purchased directly from AMX Corporation or an Authorized AMX Dealer.

AMX Corporation is not liable for any damages caused by its products or for the failure of its products to perform. This includes any lost profits, lost savings, inci-

dental damages, or consequential damages. AMX Corporation is not liable for any claim made by a third party or by an AMX Dealer for a third party.

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Standard NetLinx API (SNAPI) R 1.8.0

Table of Contents

Interfacing with Standard NetLinx API (SNAPI) .................................................... 1

Overview ........................................................................................................................... 1

Programming..................................................................................................................... 4

Channel and Level Ranges............................................................................................... 6

Commands and Escape Characters ................................................................................. 7

Amplifier ............................................................................................................................ 9

Audio Conferencer .......................................................................................................... 13

Audio Mixer ..................................................................................................................... 25

Audio Processor.............................................................................................................. 31

Audio Tape...................................................................................................................... 37

Audio Tuner Device......................................................................................................... 43

Camera ........................................................................................................................... 49

Digital Media Decoder..................................................................................................... 55

Digital Media Encoder ..................................................................................................... 67

Digital Media Server........................................................................................................ 73

Digital Satellite System ................................................................................................... 89

Digital Video Recorder .................................................................................................... 99

Disc Device ................................................................................................................... 113

Document Camera ........................................................................................................ 125

HVAC ............................................................................................................................ 131

IO Device ...................................................................................................................... 139

Keypad .......................................................................................................................... 141

Light .............................................................................................................................. 145

Monitor .......................................................................................................................... 153

2Standard NetLinx API (SNAPI) R 1.8.0

Motor ............................................................................................................................. 165

Multi Window................................................................................................................. 169

Pool Spa........................................................................................................................ 181

Power Device ................................................................................................................ 189

Pre Amp Surround Sound Processor............................................................................ 191

Receiver ........................................................................................................................ 203

Relay Device ................................................................................................................. 217

Security System ............................................................................................................ 219

Sensor Device............................................................................................................... 223

Settop Box..................................................................................................................... 225

Slide Projector............................................................................................................... 237

Switcher ........................................................................................................................ 241

Text Keypad .................................................................................................................. 245

TV.................................................................................................................................. 249

Utility ............................................................................................................................. 265

VCR............................................................................................................................... 267

Video Conferencer ........................................................................................................ 281

Video Processor............................................................................................................ 299

Video Projector.............................................................................................................. 311

Video Wall ..................................................................................................................... 325

Volume Controller ......................................................................................................... 331

Weather......................................................................................................................... 333

Interfacing with Standard NetLinx API (SNAPI)

Standard NetLinx API (SNAPI) R 1.7.0

Interfacing with Standard NetLinx API (SNAPI)

The Standard NetLinx API (SNAPI) maps function and feedback calls in Duet modules to ICSP channels, levels and commands. SNAPI allows NetLinx

programmers to utilize Duet modules in their NetLinx programs and access the function and feedback of those modules through programming similar to

programming they would use on an AMX device, such as a volume box. While each Duet module may support advanced functions via channels, levels and

commands (see specific module documentation for the channels, levels and commands supported by that module), the SNAPI mappings apply to the Standard API

supported by each module.

Overview

Devices

In Duet, all modules use a Duet virtual device. Duet virtual devices are in the range 41000:1:0 to 42000:1:0. Duet virtual devices are specifically designed for use

with Duet modules. Regular virtual devices will not work properly with Duet modules.

Ports

In Duet, each device may support one or more ports. Multiple ports are used to provide access to different components within the module. For instance, a switcher

may support output volume for each switcher output. In Duet, this is represented by a volume component for each output and in SNAPI, each of these components

is mapped to a Duet virtual device ports. Port 1 will control the volume for output 1, port 2 will control the volume for output 2, etc… Another common use of port

is to control different "zones" of and Audio Receiver, HVAC, Security Systems, etc… It is possible that a single port may offer only a small bit of functionality,

such as volume control.

Port 1 is always the "main" device and supports all functions of the device. For components that have multiple instances, such as volume, port 1 will control the

default component, which is usually component 1.

The documentation for each module will describe what ports are available and what functions they control. See the specific module documentation for a complete

list of ports supported by the module.

Interfacing with Standard NetLinx API (SNAPI)

Standard NetLinx API (SNAPI) R 1.7.0

Channels

In SNAPI, there are four kinds of channels: Input Function Channels, Momentary Function Channels, Discrete Function Channels and Feedback Channels.

Input function channels are used for response type functions, such as when a device wants to inform your program of an interesting event, similar to a button push

on a touch panel. For instance, channel 1 is the input function channel for processButtonStateEvent (). When the module has information about the push or release

of a button, the module will send a PUSH or RELEASE.

Momentary function channels are used for momentary type functions and do not provide discrete feedback. For instance, channel 9 is the momentary function

channel for cyclePower(). When pulsed, the channel cycles the state of power on the device and only provides momentary feedback, i.e. the channel is on only

while this function is activated.

Discrete function channels are used for discrete type functions and usually provide discrete feedback. For instance, channel 255 is the discrete function channel for

setPower(); When turned on, this channel sets the state of the power on the device to on. When turned off, this channel sets the state of the power on the device to

off. This channel provides discrete feedback as well; this channel is on if and only if the state of the power on the device is on. In most cases, the channel is listed

as a Discrete function channel next to the function the channel controls and as a Feedback channel next to the feedback function that controls this channel.

Feedback channels provide discrete feedback only. For instance, channel 251 is the feedback channel of Communication Active. This channel is on if and only if

the module is able to communicate to the device.

Levels

Levels in SNAPI are used for both function and feedback. In some cases, a level is only used for feedback, such as temperature, while some levels are used for

function and feedback, such a volume. In most cases, level ranges are from 0-255. All exceptions to this rule are noted, and are only used when the level range is

not bounded by a minimum and a maximum, such as temperature.

Interfacing with Standard NetLinx API (SNAPI)

Standard NetLinx API (SNAPI) R 1.7.0

Commands

Commands in SNAPI are used for discrete and momentary functions when the function requires textual information, multiple parameters, or the functions are not

commonly used. For instance, Temperature scale is set via a command because this is usually done only once in a control system program. Other functions, such as

adding and removing lighting and keypad addresses, requires more information than a channel or level alone can convey. All commands start with a command

header, followed by a "-" to separate the command from the data, and data arguments are usually separated by ","s.

Commands used to query for the status of a property start with a "?". Query commands cause the module to respond with a response command.

SNAPI.axi

SNAPI.axi is an include file that defines constants for each channel and level defined by SNAPI. These constants can be used in your programs in place of channel

and level numbers. The constant names are listed in this document alongside every SNAPI function assigned to a channel or level.

SNAPI.axi is located in C:\Program Files\Common Files\AMXShare\AXIs. The file is organized by device type and lists all the standard channels and levels that

may be supported by the module. This list does not contain all the channel or levels supported by a module and may include channels and levels not supported by a

device. See the specific module documentation for a complete list of channels and levels supported by the module.

To include SNAPI.axi in your program, simply add an #INCLUDE statement for it:

#INCLUDE 'SNAPI.axi'

The file does not need to be copied to your project directory. The NetLinx compiler will be able to find this file automatically and include it in your program.

Interfacing with Standard NetLinx API (SNAPI)

Standard NetLinx API (SNAPI) R 1.7.0

Programming

Channels

Input function channels are used for response type functions. For instance, channel 1 notifies your program of a button push in the KeypadComponent. When your

program receives a PUSH, the button is pushed. When your program receives a RELEASE, the button is released. You should use BUTTON_EVENT's to capture

the changes of an Input function channel:

BUTTON_EVENT[dvDevice, KEYPAD_BTN]

{

PUSH: // Button was pushed

{

}

RELEASE: // Button was released

{

}

Momentary function channels are used to activate functions when the channels change from an OFF state to an ON state. For instance, channel 9 or the constant

POWER cycles the state of the power on the device when it turns on. No change occurs when the channels change from an ON state to an OFF state. You should

activate Momentary function channels using the PULSE, TO or MIN_TO keywords:

PULSE[dvDevice,POWER]// Cycle the state of power

TO[dvDevice,POWER]// Cycle the state of power

MIN_TO[dvDevice,POWER]// Cycle the state of power

Discrete function channels are used to activate functions when the channel changes from an OFF state to an ON state and from an ON to an OFF state. For

instance, channel 255 or the constant POWER_ON sets the state of the power on the device when it turns on and off. You should activate discrete function channels

using the ON and OFF keywords, or any syntax that changes the state of the channel such as a feedback assignment:

ON[dvDevice,POWER_ON] // Turn the power on

OFF[dvDevice,POWER_ON] // Turn the power off

[dvDevice,POWER_ON] = ![dvDevice,POWER_ON] // Cycle the state of power

Feedback channels do not active function and should only be used for feedback. These channels can be used in CHANNEL_EVENTs or feedback assignment

statements to read the status of the channel:

bCommunicationActive = [dvDevce,DEVICE_COMMUNICATING]

CHANNEL_EVENT[dvDevice,DEVICE_COMMUNICATING]

{

ON:

ON[bCommunicationActive]

OFF:

OFF[bCommunicationActive]

}

Interfacing with Standard NetLinx API (SNAPI)

Standard NetLinx API (SNAPI) R 1.7.0

Ramping Channels

Some channels in SNAPI provide ramping functionality and some provide adjust "stepping" functionality. Since ramping on a device is only provided if the device

supports ramping, a channel that causes ramping on one device may not cause ramping on another device. The following syntax can be used universally for all

ramping functionality:

BUTTON_EVENT[dvTP,1]

{

PUSH:

TO[dvDevice,VOL_UP]

HOLD[3 , REPEAT]:

ON[dvDevce,VOL_UP]

}

The PUSH: TO part of the button event causes ramping to start and continue until the button is released. If the device does not support ramping, the device adjusts

the desired parameter either up or down one step and stops. The HOLD: ON part of the button event causes the step adjustment to repeat, at a rate specified by the

HOLD repeat time, until the button is released. The HOLD: ON part of the button event has no effect if the device supports ramping.

In a future version of Duet, it is expected that all modules will support ramping natively and that this NetLinx code will not always be required. However, if the

module you are using does not support ramping, this code can be used to achieve ramping functionality.

Levels

Levels in SNAPI are used for both function and feedback. For feedback levels, the level value can be captured in a LEVEL_EVENT, with CREATE_LEVEL or

sent directly to a touch panel display bargraph using DEFINE_CONNECT_LEVEL:

LEVEL_EVENT[dvDevice,1]

{

// LEVEL.VALUE holds the new level value

}

CREATE_LEVEL dvDevice,1,nMyVariable // nMyVariable will hold the

// latest value of the level

DEFINE_CONNECT_LEVEL(dvDevice,1,dvTp,1)

Levels used for functions can be set by calling SEND_LEVEL or by connecting to a touch panel active bargraph using DEFINE_CONNECT_LEVEL:

SEND_LEVEL dvDevice,1,nNewLevelValue

DEFINE_CONNECT_LEVEL(dvDevice,1,dvTp,1)

The CREATE_LEVEL/SEND_LEVEL mechanism is recommended for use with SNAPI. While LEVEL_EVENT will work fine, you may experience problems

when a touch panel falls offline and then reconnects, which happens often with wireless panels. LEVEL_EVENT's will only fire when a change of the level value

occurs. When the panel comes online, the only way to reliably update the level is with a SEND_LEVEL.

Interfacing with Standard NetLinx API (SNAPI)

Standard NetLinx API (SNAPI) R 1.7.0

Commands

Commands in SNAPI are sent like commands to other devices, using the SEND_COMMAND keyword:

SEND_COMAND dvDevice,'?VERSION'

Commands used to query for the status of a property start with a "?". Query commands cause the module to respond with a response command. Note that this

response is a command, not a string and can be captured in a DATA_EVENT in the COMMAND sub-section:

DATA_EVENT[dvDevice]

{

COMMAND:

{

// DATA.TEXT holds the response to a query command

}

General

The NetLinx program should assume that NetLinx levels are initially 0 and that channels are 'off'. The SNAPI router will notify the NetLinx client upon a change

of state.

All Duet Virtual Devices should be created on port 1, e.g. 41000:1:0 in the following statements:

DEFINE_DEVICE

vdvModule = 41000:1:0

dvDevice = 135:1:0

DEFINE_MODULE 'LightModule' LightModule1 (vdvModule , dvDevice )

While it is possible to create a Duet Virtual Device on a port other than 1 and pass it to the Duet module, the behavior of the module is undefined.

Channel and Level Ranges

SNAPI uses only channels in range 1-299. Some channels are used for multiple functions but these channels belong to components that do not overlap within a

single device. For instance, HVAC and Display both use channel 214 for setFanState and setFreezeOn respectively. Some channels are used for the same function

in multiple components, for instance Video Conference and Display both define channel 191 for cyclePIPPosition. In both cases, this is by design.

Some devices may use custom channels for advanced functions. Channels 67-76 and 300-399 are reserved for modules to use for whatever functions they like. See

specific module documentation for details on the channels used in that module.

SNAPI uses Levels in the range 1-48. Some levels are used for the same function in multiple components, for instance HVAC, Pool/Spa and Weather all define

level 34 for Outdoor Temperature. This is by design.

Some device may use custom levels for advanced functions. Levels 50-80 and above are reserved for modules to use for whatever functions they like. See specific

module documentation for details on the levels used in that module.

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