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Home » Eclipse Projects » 4DIAC - Framework for Distributed Industrial Automation and Control » Blinking applicaiton with Raspberry 3B QX could not write(Blinking applicaiton with Raspberry 3B QX could not write)
Blinking applicaiton with Raspberry 3B QX could not write [message #1777391] Wed, 29 November 2017 07:41 Go to next message
Barry wan is currently offline Barry wanFriend
Messages: 34
Registered: July 2017
Member
hi, I come across a problem when test the blinking application with Raspberry 3B:
QX FB STATUS show "could not write";
so how to fix it?
Re: Blinking applicaiton with Raspberry 3B QX could not write [message #1777393 is a reply to message #1777391] Wed, 29 November 2017 07:52 Go to previous messageGo to next message
Alois Zoitl is currently offline Alois ZoitlFriend
Messages: 619
Registered: January 2014
Senior Member
Hi,

out of a wild guess i would say there is something going wrong on initialisation. Could you disconnect the REQ input event and see if initalisation works or if that already delivers an error. Most users report that FORTE needs to be run as root or sudo so that it can access the IOs. Maybe that is the case here too.
Re: Blinking applicaiton with Raspberry 3B QX could not write [message #1777451 is a reply to message #1777393] Wed, 29 November 2017 13:09 Go to previous messageGo to next message
Barry wan is currently offline Barry wanFriend
Messages: 34
Registered: July 2017
Member
think you! after running forte in root, the Qx is ok.
Would you mind sharing the documentation about IX and QX?
Re: Blinking applicaiton with Raspberry 3B QX could not write [message #1777520 is a reply to message #1777451] Wed, 29 November 2017 21:44 Go to previous message
Alois Zoitl is currently offline Alois ZoitlFriend
Messages: 619
Registered: January 2014
Senior Member
If you look in the IO section of the documentation you can find documentation how to use IX and QX on the the different platforms.
Previous Topic:Accessing the same GPIO PIN on RPI with IX FBs
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