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| 型号： | M2256PW |
| 厂商： | 3M |
| 文件页数： | 26/41页 |
| 文件大小： | 306K |
| 描述： | DISPLAY SCREEN 22" MULTI-TOUCH |
| 视频文件： | Perceptive Pixel and 3M Projected Capacitive Technology 3M? GLOVE TOUCH 3M? Multi-Touch Speeds 3M? Multi-User Imagine the Possibilities of 3M? Multi-Touch |
| 标准包装： | 1 |
| 显示器类型： | * |
| 显示模式： | * |
| 可视范围： | * |
| 背光： | * |
| 点象素： | * |
| 接口： | * |
| 点尺寸： | * |
| 点间距： | * |
| 其它名称： | 3M10400 98000335129 |
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32 3M? Multi-touch Display M2256PW User Guide
3M Touch Systems, Inc. Proprietary Information – 37531 Rev D
The command response, which always follows the header, is a range of ASCII characters
depending on the type of command sent. Responses can be in many forms. For example,
one standard response is 0
(ASCII character ‘zero’ or
30 hexadecimal). This response
indicates a successful command completion for most commands, while it indicates a
failed completion for other commands. Refer to the firmware reference section for a
description of what the response indicates for each
particular command.
Another standard response is 1
(ASCII character ‘one’ or
31 hexadecimal). In most
cases, this response indicates the command failed. The controller received an invalid
command that it could not execute.
Some possible reasons for a command failure include:
?
The command was not formatted correctly.
?
The system parameters were not set up to allow command execution.
?
The controller does not support the command.
The terminator
is the last character of each res
ponse string and is an ASCII carriage
return CR. The hexadecimal code for the ASCII CR control character is 0D hexadecimal.
The value returned in the response will be
the ASCII control character for a carriage
return, displayed on the screen as the cursor moving to the next line.
In this appendix, responses are shown as a string of ASCII characters consisting of a
header, the response, and a terminator as follows:
<SOH>Response<CR>
Controller Initialization
To initialize the PX serial controller for new development, 3M Touch Systems
recommends that the host system issue a Reset command whenever the host system is
powered on and is attempting to establish communication with the controller.
Firmware Commands
Developers may use this information when
writing touch applications, developing
custom drivers or touch configurations, or testing their touch systems. Developers can
use firmware commands to initialize the controller, select operating modes, specify data
formats, and execute diagnostic functions.
Caution:
This document assumes you are familiar with firmware commands and how to
use them. Executing some commands may alter the performance of your touch system
and render it inoperable. You should be aware of the results before executing any
firmware commands.
To optimize the performance of the touch controller and simplify the development of
custom drivers, 3M Touch Systems recommends you use the commands listed in Table
17 for current development. Using these commands ensures compatibility with all 3M?
controllers.
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