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trigorilla 2560: fan's port0 and port1 do work, but fans are keep at 100% while the printer displays something else, port2 does not work

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here you can find my marlin root ; the pin declaration do seem alright to me

 

basically the port2 does not work, the port should be used for the filament's cooling fans

meanwhile port0 and port1 do work, but the fans are keept at 100% (judging from the sound), but the printer does display them as if they were at 0%, if I do set from the printer display some other value, it looks that it's doing something, like they do slightly lower the fan sound, or produce some whining at 50%, but they do not stop

 

76686181-ecb93e00-6619-11ea-8255-a60dd31

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