Embedded Systems LM5p-GSMC - Page 238

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max = self.params.channels
channels = self.channels
ticks = self.ticks
values = self.conn:lrange(self.params.skey, 0, max - 1) or {}
-- check for new values for each channel
for chan = 1, max do
val = tonumber(values[ chan ]) or 0
-- target value differs, set transcation
if val ~= channels[ chan ].target then
channels[ chan ].target = val
channels[ chan ].delta = (channels[ chan ].target - channels[ chan
].current) / ticks
channels[ chan ].ticks = ticks
end
end
end
-- main loop handler
function DMX:run()
self:getvalues()
-- transition loop
for i = 1, self.params.resolution do
self:step()
self.dm:send()
os.sleep(self.sleep)
end
end
-- single transition step
function DMX:step()
local chan, channels, t
channels = self.channels
-- transition for each channel
for chan = 1, self.params.channels do
t = channels[ chan ].ticks
-- transition is active
if t > 0 then
t = t - 1
channels[ chan ].current = channels[ chan ].target - channels[ chan
].delta * t
channels[ chan ].ticks = t
self.dm:setchannel(chan, channels[ chan ].current)
end
end
end