Motorola MK1200, Руководство по продукции

Страница: 64 / 232

3 - 18 MK1200 MicroKiosk for CE .NET 4.2 Product Reference Guide
Advanced Printer Monitoring Functionality
For some printers, such as the Zebra QL Series, the MK1200 supports advanced printer monitoring functionality,
such as:
•
Detecting if the printer cable is connected
•
Detecting if the printer power is on
•
Detecting if the printer is out of paper
•
Detecting if the printer door is open.
Configuring User Application(s)
The MK1200 Configuration Utility window configures the launching of user application(s). The seven definable
application "slots" are processed upon power up. Programs launch in sequence with no delay, unless you set the
Delay Before Launch or Waiting For Completion parameter.
The Startup program supports four parameters for each slot, detailed in Table 3-6 : executable path, command line
arguments, delay before running, and a special flag.
Reliable Sequencing of Application Programs
Use the Delay Before Launch and Wait for Completion parameters to set the startup process parameters:
•
If an application requires a definitive order of execution
•
To provide a signal between components to detect failures
•
To verify that local or networked resources are available before the main application launches.
Use the Delay Before Launch parameter to achieve a delay in the launch sequence. However, this is not a robust
way to ensure correct system operation. The recommended method is to write a separate program, with or without
a user interface, that performs required checks then terminates, possibly setting a registry value or filesystem flag
to indicate success. Set the
Wait For Completion flag and run this program before running the main application(s).
Table 3-6
User Applications, Parameter Descriptions
Parameter Description
Application Path The full “run” path to the executable. Define this in order to process the entry (i.e., do
not just specify a delay). File type associations are not supported. For example if the
Argument contains a word document, specify the full path to wordpad.exe in the
Application Path .
Arguments Optional. Command line arguments for the program above. Escape double quotation
marks using a back slash character, as in \". Also escape back slashes, i.e., \\.
Delay Before Launch Optional. Specifies the number of seconds to delay before launching the User
Application, if a previous program needs to complete or to ensure system resources are
available. This is a simple way to handle sequencing; see
Reliable Sequencing of
Application Programs on page 3-18 for more complex situations (requires “wait for
completion”).
Waiting For Completion Specifies whether the startup sequence waits for this program to complete before
launching the next one, typically set to FALSE. See
Reliable Sequencing of
Application Programs on page 3-18 .