BrightSign Roku Compact Guia do Utilizador descarregar pdf (Página 103)

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Using the registry

BrightSign has an I2C EEPROM with 2K bytes of memory that supports the storage of persistent

settings. The BrightSign software uses the registry object to read and write BrightScript data to

this eeprom. The purpose of the registry is to enable customers to store usage statistics and other

small amounts of information that may change regularly.

Individual items are stored in the registry through the use of registry keys and values. For

example, you use a registry key named “NumberOfButtonPresses” to count the number of times

a button is pressed. Registry data can be organized into different registry sections if desired.

Interactive playlists support writing to the registry, deleting from the registry, and displaying the

contents of the registry (see

Using Excel to create interactive presentations

). You can also

display the contents of the registry from a playlist (see

Playlist commands

). In addition, you can

access the registry by using a custom script that includes the

roRegistry

object (see the

BrightSign Object Reference Manual

for additional information).

The number of registry keys and values that you can use depends on a number of factors

including the number of sections, the number of keys/values per section, and the size of the keys

and values. In typical usage, there is room in the registry for about 50 keys.

Writing to the registry from an interactive playlist

When using interactive playlists, you can use the registry to track the number of times that the

system transitions from one state to another. To do this, add the following to the state name in

an event column:

:counter(<registry key name>)

In the demo example, the elo:110:180:350:400 event column shows the state CARS.TS is in.

To track the number of times that the user activates this transition, enter

cars.mpg:counter(TouchToDemoMenu)

in place of CARS.TS. Then, each time the user requests

CARS.TS, BrightSign increments the TouchToDemoMenu key value in the registry.

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BrightSign Roku Compact Guia do Utilizador Página 103