Brightsign BrightScript 3.0 Reference Manual Manual de usuario descargar pdf (Pagina 30)

EVENTS

Events in BrightScript center around an event loop and the roMessagePort object. Most BrightScript objects can post to a

message port in the form of an event object: For example, the roTimer object posts events of the type roTimerEvent.

Example: The following script sets the destination message port using the SetPort() method, waits for an event in the

form of an roGpioButton object, and then processes the event.

print "BrightSign Button-LED Test Running"

p = CreateObject("roMessagePort")

gpio = CreateObject("roGpioControlPort")

gpio.SetPort(p)

while true

msg=wait(0, p)

if type(msg)="roGpioButton" then

butn = msg.GetInt()

if butn <=5 then

gpio.SetOutputState(butn+17,1)

print "Button Pressed: ";butn

sleep(500)

gpio.SetOutputState(butn+17,0)

end if

REM ignore buttons pressed while flashing led above

while p.GetMessage()<>invalid

end while

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Brightsign BrightScript 3.0 Reference Manual Manual de usuario Pagina 30