[Newbies] Read RasPi GPIO

[Herbert König]

Hi,

I can successfully read a GPIO Pin on the RasPi if I do it like:
|value|
dataFile ensureOpen.
value := dataFile upToEnd.
dataFile close.
^value

dataFile is the /sys/class/gpio/gpioxx/value file that exists after 
exporting gpioxx.

Without the reopening and closing of the file I get '' on subsequent 
reads which means that
StandartFileStream>>basicNext answers nil.

Is there a way to get the values without having to close and reopen the 
file each time?

Thanks

Herbert