Hood D7171 SDSL, D7100 SDSL, D3100-I IDSL, D3232 IDSL User Manual

xp8010 series

digital projector

rs232 protocol reference

1 1

Notice

This manual and any examples contained herein are provided “as is” and are subject to change without notice. Hewlett-Packard Company makes no warranty of any kind with regard to this manual, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Hewlett-Packard Co. shall not be liable for any errors or for incidental or consequential damages in connection with the furnishing, performance, or use of this manual or the examples herein.

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Hewlett-Packard Company Digital Projection and Imaging 1000 NE Circle Blvd. Corvallis, OR 97330

Edition 2 (July 2003)

RS-232 protocol reference

Contents

RS-232 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Cable connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Communication settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

RS-232 protocol syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Requests. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Notifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

RS-232 keyword listing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Changing input sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

RS-232 protocol reference

RS-232 Protocol Reference

RS-232 connections

This guide describes how to configure the projector for RS-232 communication with an external controller, and describes the RS-232 command keywords used to send requests to the projector.

Cable connections

Use an RS-232 cable to connect a controller to the projector’s D-sub 9-pin connector. The table below lists the connector’s pin outputs.

When connecting a computer to the projector, use a null-modem cable.

✎

D-Sub 9-Pin Connection

Pin Signal Direction

3 TxD data from projector to controller

2 RxD data from controller to projector

5GND —

Communication settings

Make sure the controller device uses the following settings for RS-232 communication with the projector.

❏ 9600 baud

❏ 1 start bit + 8 data bits (D0 = LSB, D7 = MSB) + 1 stop bit

❏ no parity

❏ full duplex communication channels (no flow control)

❏ no handshaking

RS-232 protocol reference

RS-232 protocol syntax

The following describes the general elements of RS-232 protocol syntax. For details about a specific keyword, refer to the “RS-232 keyword listing” on page 10.

This manual uses the symbols “<CR>” and “<LF>” to represent a carriage return and

✎

line feed, respectively.

Requests

Commands are sent to the projector as “requests,” which consist of an asterisk (*) prefix, a command keyword, any needed parameter, and a carriage return <CR> as a terminator:

* keyword = parameter <CR>

Requests can contain only ASCII alphanumeric characters. Blanks (spaces) are allowed, except within keywords and numbers. Line feeds <LF> are ignored.

The following table shows the specific syntax to use for various requested tasks.

To perform this task... Use this request syntax

Change a setting to a specified value *keyword=value<CR>

Query a setting *keyword=?<CR>

Increment a setting *keyword=+<CR>

Decrement a setting *keyword=–<CR>

Invoke an action (no parameter needed) *keyword<CR>

Some requests to modify a particular setting also modify other related settings. For example, a request to modify the active input source might also modify settings such as brightness or white intensity to suit the new source. This and other requests can produce delayed (asynchronous) notifications — see page 9 for examples.

RS-232 protocol reference

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