Embedded Systems LM5p-GSMC - Page 229

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local main, rev, step, val, new, delay
step = 10 -- in %
delay = 0.5 -- in seconds
-- ignore "stop" command
val = tonumber(event.datahex, 16)
if val == 0 then
return
end
-- up, normal mode
if event.dst == up then
main, rev = up, down
-- down, reverse step
elseif event.dst == down then
main, rev = down, up
step = -step
-- invalid object
else
return
end
-- current output object value
val = grp.getvalue(out) or 0
while true do
-- main object in "stop" state
if not grp.getvalue(main) then
return
end
-- reverse object in "start" state
if grp.getvalue(rev) then
return
end
-- get new value
new = math.min(100, val + step)