Joesphan at 04:08, 18 August 2026

2026-08-18T04:08:53Z

← Older revision		Revision as of 04:08, 18 August 2026
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	Simple startup example:		Simple startup example:

	<~~syntaxhighlight lang="lua"~~>		<pre>
	print('Hello Lua startup!')		print('Hello Lua startup!')

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	print('Hello onTick()')		print('Hello onTick()')
	end		end
	</~~syntaxhighlight~~>		</pre>

	=== Controlling the tick rate ===		=== Controlling the tick rate ===
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	<code>setTickRate(hz)</code> sets how often epicEFI calls <code>onTick</code>. If your script does heavy work, it may run slower than the requested rate. The Lua VM runs at low priority relative to engine control, so you cannot starve critical ECU functions — set the rate to whatever your script needs. <code>onCanRx</code> runs at the same rate as <code>onTick</code>.		<code>setTickRate(hz)</code> sets how often epicEFI calls <code>onTick</code>. If your script does heavy work, it may run slower than the requested rate. The Lua VM runs at low priority relative to engine control, so you cannot starve critical ECU functions — set the rate to whatever your script needs. <code>onCanRx</code> runs at the same rate as <code>onTick</code>.

	<~~syntaxhighlight lang="lua"~~>		<pre>
	n = 0		n = 0
	setTickRate(5) -- 5 Hz		setTickRate(5) -- 5 Hz
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	n = n + 1		n = n + 1
	end		end
	</~~syntaxhighlight~~>		</pre>

	=== Editing scripts ===		=== Editing scripts ===
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	CAN RX callback shape:		CAN RX callback shape:

	<~~syntaxhighlight lang="lua"~~>		<pre>
	function onCanRx(bus, id, dlc, data)		function onCanRx(bus, id, dlc, data)
	-- handle frame		-- handle frame
	end		end
	</~~syntaxhighlight~~>		</pre>

	For high-throughput RX, see <code>enableCanRxWorkaround()</code> in the firmware examples.		For high-throughput RX, see <code>enableCanRxWorkaround()</code> in the firmware examples.
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	<code>deltaTime</code> is measured automatically between successive <code>pid:get</code> calls.		<code>deltaTime</code> is measured automatically between successive <code>pid:get</code> calls.

	<~~syntaxhighlight lang="lua"~~>		<pre>
	-- p, i, d, min, max		-- p, i, d, min, max
	pid = Pid.new(2, 0, 0, -100, 100)		pid = Pid.new(2, 0, 0, -100, 100)
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	industrialPid:get(target, input)		industrialPid:get(target, input)
	industrialPid:reset()		industrialPid:reset()
	</~~syntaxhighlight~~>		</pre>

	=== Utility ===		=== Utility ===
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	'''Example:'''		'''Example:'''

	<~~syntaxhighlight lang="lua"~~>		<pre>
	n = 5.5		n = 5.5
	print('Hello Lua, number is: ' .. n)		print('Hello Lua, number is: ' .. n)
	</~~syntaxhighlight~~>		</pre>

	Output: <code>Hello Lua, number is: 5.5</code>		Output: <code>Hello Lua, number is: 5.5</code>
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	=== Timer example ===		=== Timer example ===

	<~~syntaxhighlight lang="lua"~~>		<pre>
	t = Timer.new()		t = Timer.new()
	timingAdd = 0		timingAdd = 0
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	print('Hello analog ' .. auxV .. " " .. val)		print('Hello analog ' .. auxV .. " " .. val)
	end		end
	</~~syntaxhighlight~~>		</pre>

	=== PWM ===		=== PWM ===

	<~~syntaxhighlight lang="lua"~~>		<pre>
	startPwm(0, 100, 0)		startPwm(0, 100, 0)

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	setPwmDuty(0, enable_pump and 1 or 0)		setPwmDuty(0, enable_pump and 1 or 0)
	end		end
	</~~syntaxhighlight~~>		</pre>

	=== CAN transmit ===		=== CAN transmit ===

	<~~syntaxhighlight lang="lua"~~>		<pre>
	function onTick()		function onTick()
	clt = getSensor("CLT")		clt = getSensor("CLT")
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	txCan(1, 0x600, 1, txPayload)		txCan(1, 0x600, 1, txPayload)
	end		end
	</~~syntaxhighlight~~>		</pre>

	=== Set sensor value ===		=== Set sensor value ===
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	Use standard sensor names from TunerStudio Live Data.		Use standard sensor names from TunerStudio Live Data.

	<~~syntaxhighlight lang="lua"~~>		<pre>
	-- do not configure the same physical input elsewhere		-- do not configure the same physical input elsewhere
	vssSensor = Sensor.new("VehicleSpeed")		vssSensor = Sensor.new("VehicleSpeed")
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	print("VSS " .. valFromSensor)		print("VSS " .. valFromSensor)
	end		end
	</~~syntaxhighlight~~>		</pre>

	=== CAN receive ===		=== CAN receive ===

	<~~syntaxhighlight lang="lua"~~>		<pre>
	canRxAdd(0x500)		canRxAdd(0x500)
	canRxAdd(0x570)		canRxAdd(0x570)
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	end		end
	end		end
	</~~syntaxhighlight~~>		</pre>

	=== Table / curve ===		=== Table / curve ===

	<~~syntaxhighlight lang="lua"~~>		<pre>
	tableIndex = findTableIndex("duty")		tableIndex = findTableIndex("duty")

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	sparkCutCurve = findCurveIndex("sparkcut")		sparkCutCurve = findCurveIndex("sparkcut")
	sparkCutByTorque = curve(sparkCutCurve, torquex)		sparkCutByTorque = curve(sparkCutCurve, torquex)
	</~~syntaxhighlight~~>		</pre>

	== See also ==		== See also ==

Joesphan: /* Variable names and hashes */

2026-08-18T03:19:08Z

Variable names and hashes

← Older revision		Revision as of 03:19, 18 August 2026
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	Calibration names, output channel names, variable types (CONFIG GETTER/SETTER, OUTPC GETTER/SETTER), and their '''djb2 hashes''' depend on your exact firmware build. Do not guess — look them up here:		Calibration names, output channel names, variable types (CONFIG GETTER/SETTER, OUTPC GETTER/SETTER), and their '''djb2 hashes''' depend on your exact firmware build. Do not guess — look them up here:

	'''[https://content.epicefi.com/docs/variable_status_selector.html ~~Variable Status Selector~~]'''		'''[https://content.epicefi.com/docs/variable_status_selector.html Variables Lookup]'''

	Use this tool when calling <code>getCalibration()</code> / <code>setCalibration()</code>, <code>getOutput()</code>, configuring user-table axes, or reading/writing variables over EPIC CAN.		Use this tool when calling <code>getCalibration()</code> / <code>setCalibration()</code>, <code>getOutput()</code>, configuring user-table axes, or reading/writing variables over EPIC CAN.

Joesphan at 03:17, 18 August 2026

2026-08-18T03:17:15Z

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Joesphan at 03:15, 18 August 2026

2026-08-18T03:15:51Z

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Joesphan at 03:15, 18 August 2026

2026-08-18T03:15:33Z

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2026-08-18T02:49:32Z

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Lua - Revision history

Joesphan at 04:08, 18 August 2026

Joesphan: /* Variable names and hashes */

Joesphan at 03:17, 18 August 2026

Joesphan at 03:15, 18 August 2026

Joesphan at 03:15, 18 August 2026

Joesphan: Created page with "safsefwefewfewfwef"