Events – BrightSign BrightScript 3.0 Reference Manual User Manual

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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
end if

REM ignore buttons pressed while flashing led above
while p.GetMessage()<>invalid
end while