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Display Service
MWDisplayService is a standard service application that starts automatically at startup,
before user logs in and run in the background continuously while the CPU is on.
MWDisplayService acts as a serial communication server and provides synchronized access
to the display for all applications (clients) that are using MWDll API. The service allows
sharing of display resources between multiple applications and connection of multiple
displays to the single CPU.
Display DLL
MWDll provides access for internal and 3
the MWDisplayService. The API includes unique MW810 interface as well as standard
DDC/CI commands.
In addition, it provides a mechanism to retrieve events from the display and deliver them to
application clients. System event sources can be one of the following: the Emergency key, a
Function key, the power button, thermal and battery control events.
Extrakey
Extrakey is a software utility than can assign specific function of the operating system to a
Function key. Refer to the Function Key chapter for details.
MW Manager
MWManager receives, shows and logs all display events. It displays hardware and software
versions, temperature and battery status. This software application provides basic
information about the display and selection of desired notifications on extreme conditions. To
run Display Manager, click the MW800 Display Manager icon on the Start menu.
This application provides the following information:
•
Versions - General information about Display hardware, embedded firmware and
software versions
•
Power - The Display current consumption and the voltage level of the vehicle battery
•
Temperature Real-time internal temperatures
•
Agent Notifications - alerts if one of the following event occurs
Internal temperature is beyond the operational limit.
If during operation the internal temperature is close to the low or high operational
limits, the display will provide critical temperature indication. If during operation
the internal temperature goes outside the operational limit, the display eventually
powers off.
Vehicle battery is discharged.
If, during normal operation, the battery voltage drops below the Low Battery
Threshold, the display will provide low battery indication and send the Low
Battery event to the CPU.
Drops in car battery voltage.
If battery voltage falls below the Critically Low Battery Threshold for 20 seconds
or more, the device will send a Cranking alert to the CPU, execute critical shut
down and power itself off.
MW810 Display Owner's Manual 29
rd
-party applications API to display resources via
6802982C85-C
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