Hondata KPro4: Difference between revisions

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=Introduction=
=Introduction=
The following script adapts the Hondata KPro4 CAN to RaceCapture/Pro
The following script adapts the Hondata CAN to RaceCapture/Pro. KPro4 and S300 CAN are supported.


[[Image:Hondata_KPro4.jpg]]
[[Image:Hondata_KPro4.jpg]]
Line 19: Line 19:


==Wiring==
==Wiring==
Use the supplied Hondata harness and connect the CAN High / CAN Low to the corresponding CAN High / CAN Low on the RaceCapture/Pro CAN 1 channel. See the [CAN_Bus_Integration|CAN integration guide]] for wiring details.
Connecting to the Hondata system requires two wires:


==CAN termination==
* '''CAN1 High''' from RaceCapture  to '''CAN high''' of the Hondata system.
The KPro4 does not have built-in CAN termination. You will need to also connect a 120 ohm resistor across the CAN High / CAN Low connections at the connections to the KPro4.  
* '''CAN1 Low''' from RaceCapture  to '''CAN low''' of the Hondata system.  


=Script=
For RaceCapture wiring, see the [[CAN_Bus_Integration|CAN integration guide]] for wiring details.
Copy and paste this script into the scripting window of RaceCapture/Pro. Ensure any existing script is removed.


<pre>
'''Note:''' Ensure RaceCapture and the Hondata system are grounded to a common location to prevent CAN bus data errors.
--This example adopted to Hondata KPro4 CAN output


--how frequently we poll for CAN messages, 30Hz is the max
If you are unsure about how to wire the Hondata ECU, or what connections to use, please contact [https://www.hondata.com/ Hondata] for support.
tickRate = 30
--the CAN baud rate
CAN_baud = 250000
--CAN channel to listen on. 0=first CAN channel, 1=second
CAN_chan = 0


--add your virtual channels here
==CAN termination==
rpmId = addChannel("RPM", 25, 0, 0, 9000, "RPM")
The KPro4 does not have built-in CAN termination. You will need to also connect a 120 ohm resistor across the CAN High / CAN Low connections at the connections to the KPro4.  
vltId = addChannel("EcuVolts", 10, 1, 0, 20, "volts")
iatId = addChannel("IAT", 1, 0, 0, 100, "F")
ectId = addChannel("EngineTemp", 1, 0, 0, 150, "F")
tpsId = addChannel("TPS", 10, 0, 0, 100, "%")
mapId = addChannel("MAP", 10, 2, -15, 25, "PSI")
injId = addChannel("InjectorPW", 10, 3, 0, 100, "ms")
ignId = addChannel("Ignition", 10, 0, -20, 20, "D")
lmdId = addChannel("AFR", 10, 3, 0, 2, "lambda")
knkId = addChannel("Knock", 1, 0, 0, 15, "count")
camId = addChannel("CamTiming", 10, 0, -20, 20, "D")
 
function toF(value)
return value * 1.8 + 32
end


function toAFR(value)
==CAN preset==
return value * 14.7
end


--customize here for CAN channel mapping
Under CAN Bus, select 500Kbps for the baud rate and Termination On.
--offset/length in bytes?
[[image:CANBUSBaudRate.png]]
--format is: [CAN Id] = function(data) map_chan(<channel id>, data, <CAN offset>, <CAN length>, <multiplier>, <adder>)
CAN_map = {
--did not bother logging gear speed and target cam angle
[1632] = function(data) map_chan(rpmId, data, 0, 2, 1, 0) map_chan(vltId, data, 5, 1, 0.1, 0) end,
[1633] = function(data) map_chan(iatId, data, 0, 2, 1, 0, toF) map_chan(ectId, data, 2, 2, 1, 0, toF) end,
[1634] = function(data) map_chan(tpsId, data, 0, 2, 1, 0) map_chan(mapId, data, 2, 2, 0.0145037738, -14.7) end,
[1635] = function(data) map_chan(injId, data, 0, 2, 0.001, 0) map_chan(ignId, data, 2, 2, 1, 0) end,
[1636] = function(data) map_chan(lmdId, data, 0, 2, 0.00003051757, 0, toAFR) end,
[1637] = function(data) map_chan(knkId, data, 0, 2, 1, 0) end,
[1638] = function(data) map_chan(camId, data, 2, 2, 1, 0) end
}


function onTick()
processCAN(CAN_chan)
processLogging() 
end


function processLogging()
Under RaceCapture / CAN channels Setup, select the Hondata preset from the list of presets available.
if getGpio(1) < 1 then
[[image:Hondata_CAN_preset.png]]
  startLogging()
else
  stopLogging()
end
end




--===========do not edit below===========
After selecting the preset, write the settings back to RaceCapture
function processCAN(chan)
    repeat
        local id, e, data = rxCAN(chan)
        if id ~= nil then
            local map = CAN_map[id]
            if map ~= nil then
                map(data)         
            end
        end
    until id == nil
end


--Map CAN channel, big endian format
==Verifying Data==
function map_chan(cid, data, offset, len, mult, add, filter)
    offset = offset + 1
    local value = 0
    while len > 0 do
        value = (value * 256) + data[offset]
        offset = offset + 1
        len = len - 1
    end
local cv = value * mult + add
if filter ~= nil then cv = filter(cv) end
    setChannel(cid, cv)
end


initCAN(CAN_chan, CAN_baud)
Switch to the Dashboard mode, then page to the raw channels view.  You should see your Hondata channels updating in real time.
setTickRate(tickRate)
</pre>

Latest revision as of 14:17, 6 January 2021

Introduction

The following script adapts the Hondata CAN to RaceCapture/Pro. KPro4 and S300 CAN are supported.

Hondata KPro4.jpg

Supported Channels

This integration supports the following channels:

  • RPM
  • EcuVolts
  • IAT
  • EngineTemp
  • TPS
  • MAP
  • InjectorPW
  • Ignition
  • Knock
  • CamTiming

Wiring

Connecting to the Hondata system requires two wires:

  • CAN1 High from RaceCapture to CAN high of the Hondata system.
  • CAN1 Low from RaceCapture to CAN low of the Hondata system.

For RaceCapture wiring, see the CAN integration guide for wiring details.

Note: Ensure RaceCapture and the Hondata system are grounded to a common location to prevent CAN bus data errors.

If you are unsure about how to wire the Hondata ECU, or what connections to use, please contact Hondata for support.

CAN termination

The KPro4 does not have built-in CAN termination. You will need to also connect a 120 ohm resistor across the CAN High / CAN Low connections at the connections to the KPro4.

CAN preset

Under CAN Bus, select 500Kbps for the baud rate and Termination On. CANBUSBaudRate.png


Under RaceCapture / CAN channels Setup, select the Hondata preset from the list of presets available. Hondata CAN preset.png


After selecting the preset, write the settings back to RaceCapture

Verifying Data

Switch to the Dashboard mode, then page to the raw channels view. You should see your Hondata channels updating in real time.

Retrieved from "https://wiki.autosportlabs.com/index.php?title=Hondata_KPro4&oldid=9083"