Project: door control

This week you built edges, timers, sequences and interlocks. Now everything comes together: a door control for the vestibule between the living area and the garage.

The setup#

A button press opens “its” door. After OPENTIME ticks it closes by itself. While one door is open, the other stays closed and locked, and its status lamp lights up.

Milestones#

1. Button opens, timer closes: a press on “TasterInnen” opens the inner door. After OPENTIME ticks it is closed again.
2. Interlock: while the inner door is open, “TasterAussen” does nothing. The same the other way round.
3. Status lamps: a door’s lamp lights up while this door is locked because the other one stands open.
4. Failure: if one door is missing, the other no longer opens.

Building blocks#

Per door you need an edge and a timer that is set to OPENTIME on opening and then runs down:

sgt edge btnIn lastIn           # press inside?
move lastIn btnIn
and edge edge shutOut           # only if outside is closed
select timeIn edge OPENTIME timeIn
sub timeIn timeIn 1
max timeIn timeIn 0
sgtz openIn timeIn

For the outer door priority comes on top: it only opens if the inner door is neither open nor opening in the same tick. So work out the inner door first and check openIn afterwards.