[Newbies] FileDirectory exists: returns false for GPIO RasPi

Herbert König herbertkoenig at gmx.net
Thu Jan 29 08:58:12 UTC 2015

Ok, I worked around it by just repeating to open the file until I get 
back a FileStream.

Not that I like the approach, ideas still welcome :-))



Am 28.01.2015 um 15:51 schrieb Herbert König:
> Hi,
> I'm trying to use the GPIO on the Raspberry Pi.
> After I export a GPIO before setting its direction I need to wait 
> until all Folders and files of the GPIO pin are created.
> I try this with:
> FileDirectory default fileExists '/fullPathToTheGpio/direction'
> This never returns true.
> Any hint on how to find out when I can start writing to the file?
> I I just wait 3 seconds before writing to the pin for the first time 
> it works. Subsequent writes work instantly.
> Thanks,
> Herbert
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