UM0224 datasheet(30/34 Pages) STMICROELECTRONICS

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Running the demonstrations

STR75x demonstration software

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2.4.8

Screen saver

The STR750 Watchdog Timer module (WDG) can be used to reset the system or used as a

timer base to generate an interrupt after a selected time delay depending on the system

clock. In this demonstration software the WDG is used as timer with its End of Count

interrupt, that sets a screen saver display when the WDG timer reaches a specified time

delay without resetting the system. If any of the push-buttons are pressed during this delay

which is 30 seconds, the screen saver is displayed on LCD. Since one push-button is

pressed, the last sub-menu is re-displayed on LCD.

When the demonstrations enter in screen save mode, the date and time are displayed on

the LCD as shown in the figure below. The time and date are continuously updated:

Using the WDG functions, we can enable or disable the screen saver for each

demonstration sub-menu.

2.4.9

About menu

This menu shows the version of the STR75x Demo software. When this sub-menu is

selected the following message is displayed on the LCD screen:

MM/DD/YY

HH:MM:SS

STR75x Demo

Version 1.0

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