The open collector input pins on the piface are extremely sensitive. If these pullups are switched off, wiring with slightly longer wires will trigger the inputs very fast between open/close if contact is open.
It would be a great help and simple enhancement if the initial state of the pullup resistors could be configured per input in ohpiface.conf
Proposal: A 8 bit value like
PULLUPS=0xFF
initializes all 8 input pullups to 1 using _digital_write_pullup(pinnumber, state).
hmerk
commented
8 years ago
The open collector input pins on the piface are extremely sensitive. If these pullups are switched off, wiring with slightly longer wires will trigger the inputs very fast between open/close if contact is open.
It would be a great help and simple enhancement if the initial state of the pullup resistors could be configured per input in ohpiface.conf
Proposal: A 8 bit value like
PULLUPS=0xFF
initializes all 8 input pullups to 1 using _digital_write_pullup(pinnumber, state).