some Lua fun

firmware/controllers/lua/examples/bmw-idrive.txt

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+-- https://rusefi.com/forum/viewtopic.php?f=4&t=2325
+-- tested on 9286699
+
+
+CAN_BUTTONS = 0x267
+
+brighness = 0
+
+canRxAdd(0x264) -- rotation, I did not get it to work
+canRxAdd(CAN_BUTTONS) -- buttons
+
+setTickRate(5) -- set tick rate to 5hz
+
+function onCanRx(bus, id, dlc, data)
+	id = id % 2048
+	-- 	print('got CAN id=' ..id ..' dlc=' ..dlc)
+
+	if id == CAN_BUTTONS then
+		-- 		print('got buttons @4=' ..data[4] ..' @6=' ..data[6])
+
+		if data[4] == 1 or data[4] == 2 then
+			print('got hold or release @4=' ..data[4] ..' @6=' ..data[6])
+
+			if data[6] == 2 and brighness > 0 then
+				brighness = brighness - 1
+				print('brighness ' ..brighness)
+			end
+
+			if data[6] == 4 and brighness < 15 then
+				brighness = brighness + 1
+				print('brighness ' ..brighness)
+			end
+		end
+	end
+end
+
+function onTick()
+	-- wake up, need to send once every 1.5 second but we can send more often because why not
+	txCan(1, 0x563, 0, { 3 })
+	txCan(1, 0x202, 0, { brighness * 16 + 0xd })
+end
+