AIM CAN
This section documents how to control an AIM Mychron3 Dash display, using an RCP unit via LUA scripting. The following information is a sum up of reverse engineering findings documented here: [1]. Examples of LUA implementation of the the different packets documented on the Mychron 3 Hack page are provided below.
Packet 401h: RPM, Speed, Gear blink control, Gear
function onTick() local rpm = getTimerRpm(0) local speedmph = getGpsSpeed() -- Assume the gear is calculated and stored in a virtual channel. -- Refer to LUA scripting example to calculate the gear based on speed and RPM local gear = getChannel(gearId) local msg = {rpm % 256, rpm / 256, (speedmph % 16) % 256, (speedmph / 16) / 256, 0, 0, gear, 0} txCAN(0, 1025, 0, msg) end
Packet 402h: Temperature/Pressure fields (bottom left of display)
function onTick() -- Assume different temperature values are stored in virtual channels local temp1 = getChannel(temp1Id) local temp2 = getChannel(temp2Id) local temp3 = getChannel(temp3Id) local temp4 = getChannel(temp4Id) local msg = {temp1 % 256, temp1 / 256, temp2 % 256, temp2 / 256, temp3 % 256, temp3 / 256, temp4 % 4, temp4 / 256} txCAN(0, 1026, 0, msg) end
Packet 405h: Shift LEDs, Alarm LEDs
function onTick() local shiftLeds = 0 local rpm = getTimerRpm(0) if rpm > 5000 then shiftLeds = shiftLeds + 1 end if rpm > 6000 then shiftLeds = shiftLeds + 2 end if rpm > 7000 then shiftLeds = shiftLeds + 4 end if rpm > 7500 then shiftLeds = shiftLeds + 8 end if rpm > 7700 then shiftLeds = shiftLeds + 16 end local msg = {0, 0, 0, 0, 0, 0, shiftLeds, 0} txCAN(0, 1029, 0, msg) end
Packet 406h: RPM range for the digital RPM readout
function onTick() -- Set the RPM range -- Value RPM Range -- 0 25,000 - 0 -- 1 22,000 - 0 -- 2 20,000 - 0 -- 3 16,000 - 0 -- 4 12,000 - 0 -- 5 10,000 - 0 -- 6 8,000 - 0 -- 7 6,000 - 0 -- 8 4,000 - 0 local rpmRange = 6 -- Up to 8000 RPM local msg = {0, rpmRange * 16, 0, 0, 0, 0, 0, 0} txCAN(0, 1030, 0, msg) end