Advantech RISC SOM-A2558 Informações Técnicas descarregar pdf (Página 14)

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Advantech SOM-A200 series Software Manual

1.4.6.3 Display

From time to time it is unnecessary to turn on the display attached to the SOM-A all

the day. The Display page provides several frequently used functions such as turning

off the LCD and backlight to elongate the display repair period, adjusting brightness

or contrast. For example, if user wants the backlight turn-off setting function, he can

press "setting" button. Then the backlight page of Display Properties of Control Panel

will appear on the screen. Besides, user can click the "Off Now" button to turn off the

backlight of the display panel immediately without waiting. Once the backlight was

turned off, there were three inputs to turn it on: (1) mouse; (2) keyboard; (3)

touch-screen; user can use any one of them to turn on the display. The lower

“Brightness” and “Contrast” blocks have scroll bars by which users can tune

brightness level of TFT LCD or the contrast level of passive matrix LCD.

Figure 1.10 Display configuration

1.4.6.4 WatchDog timer

It is important in industrial applications that the control systems are rarely crashed, or

are capable of self-reset if they are halted somehow. Watchdog function of automatic

resetting system is therefore provided in SOM-A. There is a timer inside the watchdog

function. User’s AP could invoke the associated APIs in Watchdog function to start

the timer, then Watchdog function would repeat the countdown of the specified period

of time to reboot the system if the user’s AP does not clear the timer in time

periodically. The Watchdog function in the SOM-A provides eight different time

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Advantech RISC SOM-A2558 Informações Técnicas Página 14