hello, i've the picoLCD, works fine but i need to execute a system
command by pressing a button, i've try this:
Display picoLCD {
Driver 'picoLCDGraphic'
Size '256x64'
Contrast 230
Backlight 1
Inverted 1
Icons 1
}
Widget TimerW {
class 'Timer'
expression n=LCD::GPI(1);nkey=n
active 1
update tack
}
Widget GPO_kup {
class 'GPO'
expression linea=nkey==5?exec('/usr/bin/beep')
update tack
}
Widget Ene {
class 'Text'
expression 'Hello'
width 5
}
Layout Default {
Row5 {
Col5 'ene'
}
Timer1 'TimerW'
GPO3 'GPO_kup'
}
Display 'picoLCD'
Layout 'Default'
Variables {
tick 500
tack 100
minute 60000
n 0
nkey 0
linea 1
}
but the 'beep' sounds always, how i can do it?
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