only:nissan TCU script progress, no DTC
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rusefillc
rusEFI LLC
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-- scriptname nissan-xterra-tcu.txt
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-- sometimes we want to cut a CAN bus and install rusEFI into that cut
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-- https://en.wikipedia.org/wiki/Man-in-the-middle_attack
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-- this controls onCanRx rate as well!
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setTickRate(300)
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ECU_BUS = 1
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-- really 'not ECU'
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TCU_BUS = 2
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TCU_251_593 = 593
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TCU_253_595 = 595
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hexstr = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, "A", "B", "C", "D", "E", "F" }
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function toHexString(num)
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if num == 0 then
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return '0'
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end
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local result = ""
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while num > 0 do
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local n = num % 16
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result = hexstr[n + 1] ..result
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num = math.floor(num / 16)
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end
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return result
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end
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function arrayToString(arr)
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local str = ""
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local index = 1
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while arr[index] ~= nil do
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str = str.." "..toHexString(arr[index])
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index = index + 1
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end
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return str
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end
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totalEcuMessages = 0
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totalTcuMessages = 0
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totalDropped = 0
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totalReplaced = 0
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function silentDrop(bus, id, dlc, data)
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totalDropped = totalDropped + 1
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end
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function printAndDrop(bus, id, dlc, data)
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print('Dropping ' ..arrayToString(data))
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totalDropped = totalDropped + 1
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end
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ENGINE_1_505 = 505
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ENGINE_2_561 = 561
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ENGINE_7_563 = 563
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ENGINE_3_573 = 573
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ENGINE_4_574 = 574
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ENGINE_5_1361 = 1361
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ENGINE_6_1408 = 1408
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function onAnythingFromECU(bus, id, dlc, data)
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-- totalEcuMessages = totalEcuMessages + 1
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if id ~= ENGINE_1_505
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and id ~= ENGINE_2_561
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and id ~= ENGINE_7_563
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and id ~= ENGINE_3_573
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and id ~= ENGINE_4_574
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and id ~= ENGINE_5_1361
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and id ~= ENGINE_6_1408
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and id ~= 721
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and id ~= 734
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then
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print('from ECU ' ..id .." " ..arrayToString(data) .." dropped=" ..totalDropped .." replaced " ..totalReplaced)
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end
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if id < 2048 then
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txCan(TCU_BUS, id, 0, data) -- relay non-TCU message to TCU
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else
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print ("Not relaying EXT" .. id)
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end
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end
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function relayFromECU(bus, id, dlc, data)
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totalEcuMessages = totalEcuMessages + 1
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txCan(TCU_BUS, id, 0, data) -- relay non-TCU message to TCU
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end
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function onAnythingFromTCU(bus, id, dlc, data)
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totalTcuMessages = totalTcuMessages + 1
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if id ~= TCU_251_593 and id ~= TCU_253_595 then
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print('from TCU ' ..id .." " ..arrayToString(data) .." dropped=" ..totalDropped .." replaced " ..totalReplaced)
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end
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txCan(ECU_BUS, id, 0, data) -- relay non-ECU message to ECU
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end
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--function getTwoBytesLSB(data, offset, factor)
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-- return (data[offset + 2] * 256 + data[offset + 1]) * factor
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--end
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function getTwoBytesMSB(data, offset, factor)
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return (data[offset + 1] * 256 + data[offset + 2]) * factor
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end
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function setTwoBytesMsb(data, offset, value)
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value = math.floor(value)
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data[offset + 1] = value >> 8
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data[offset + 2] = value & 0xff
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end
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local rpm = 0
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payloadENGINE_1_505 = {0x20, 0x00, 0x1a, 0x5e, 0x00, 0x00, 0x00, 0x00}
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function onENGINE_1_505(bus, id, dlc, data)
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rpm = getTwoBytesMSB(data, 2, 0.125)
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setTwoBytesMsb(data, 2, 8 * rpm)
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txCan(TCU_BUS, ENGINE_1_505, 0, payloadENGINE_1_505)
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end
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pps = 0
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-- 231
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payloadENGINE_2_561 = {0xe0, 0x80, 0x09, 0xe0, 0xd4, 0xc3, 0x4c, 0x9e}
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function onENGINE_2_561(bus, id, dlc, data)
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payloadENGINE_2_561[3] = pps / 0.5 -- data[3] -- tps or pps
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txCan(TCU_BUS, ENGINE_2_561, 0, payloadENGINE_2_561)
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end
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payloadENGINE_7_563 = {0x79, 0xa2, 0x00, 0x18, 0x0e, 0x00, 0x00, 0x01}
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-- 233
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function onENGINE_7_563(bus, id, dlc, data)
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-- rpm315
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payloadENGINE_7_563[4] = data[4] -- RPMlow
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payloadENGINE_7_563[7] = data[7] -- RPMhi
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txCan(TCU_BUS, ENGINE_7_563, 0, payloadENGINE_7_563)
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end
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payloadENGINE_3_573 = {0x00, 0x0e, 0x0b, 0x0e, 0x01, 0x38, 0x00, 0x79}
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-- 23D
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function onENGINE_3_573(bus, id, dlc, data)
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-- payloadENGINE_3_573[1] = data[1]
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payloadENGINE_3_573[2] = data[2]
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pps = payloadENGINE_3_573[2] * 0.392
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payloadENGINE_3_573[3] = pps / 0.392 -- data[3] -- Throttle_position_capped
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-- payloadENGINE_3_573[7] = data[7] -- CLT
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txCan(TCU_BUS, ENGINE_3_573, 0, payloadENGINE_3_573)
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-- txCan(TCU_BUS, ENGINE_3_573, 0, data)
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end
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ENGINE_4_574 = 574
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payloadENGINE_4_574 = {0x00, 0x40, 0xff, 0x45, 0x00, 0xd6, 0x00, 0xa2}
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-- 23E
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function onENGINE_4_574(bus, id, dlc, data)
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payloadENGINE_4_574[3] = (100 - pps) / 0.392 -- data[3] -- affects desired torque converter pressure Throttle_position_inverted
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payloadENGINE_4_574[7] = pps / 0.392 -- data[7] -- TPS
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-- txCan(TCU_BUS, ENGINE_4_574, 0, data)
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txCan(TCU_BUS, ENGINE_4_574, 0, payloadENGINE_4_574)
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end
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payloadENGINE_5 = {0x7d, 0xdb, 0x00, 0xa0, 0x00, 0x02, 0x80, 0xff}
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function onENGINE_5(bus, id, dlc, data)
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txCan(TCU_BUS, ENGINE_5_1361, 0, payloadENGINE_5)
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end
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payloadENGINE_6 = {0x00, 0x82, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00}
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function onENGINE_6(bus, id, dlc, data)
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txCan(TCU_BUS, ENGINE_6_1408, 0, payloadENGINE_6)
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end
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canRxAdd(ECU_BUS, ENGINE_1_505, onENGINE_1_505)
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canRxAdd(ECU_BUS, ENGINE_2_561, onENGINE_2_561)
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canRxAdd(ECU_BUS, ENGINE_7_563, onENGINE_7_563)
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canRxAdd(ECU_BUS, ENGINE_3_573, onENGINE_3_573)
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canRxAdd(ECU_BUS, ENGINE_4_574, onENGINE_4_574)
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canRxAdd(ECU_BUS, ENGINE_5_1361, onENGINE_5)
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canRxAdd(ECU_BUS, ENGINE_6_1408, onENGINE_6)
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--canRxAdd(ECU_BUS, ENGINE_4_574, silentDrop)
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--canRxAdd(ECU_BUS, ENGINE_5_1361, relayFromECU)
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--canRxAdd(ECU_BUS, ENGINE_6_1408, relayFromECU)
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--canRxAdd(ECU_BUS, 721, silentDrop) -- required for TCU not to throw code
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--canRxAdd(ECU_BUS, 734, silentDrop) -- required for TCU not to throw code
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canRxAdd(ECU_BUS, 2, silentDrop)
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canRxAdd(ECU_BUS, 533, silentDrop)
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canRxAdd(ECU_BUS, 534, silentDrop)
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canRxAdd(ECU_BUS, 640, silentDrop)
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canRxAdd(ECU_BUS, 644, silentDrop)
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canRxAdd(ECU_BUS, 645, silentDrop)
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canRxAdd(ECU_BUS, 670, silentDrop)
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canRxAdd(ECU_BUS, 672, silentDrop)
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canRxAdd(ECU_BUS, 677, silentDrop)
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canRxAdd(ECU_BUS, 861, silentDrop)
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canRxAdd(ECU_BUS, 901, silentDrop)
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canRxAdd(ECU_BUS, 852, silentDrop)
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canRxAdd(ECU_BUS, 856, silentDrop)
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canRxAdd(ECU_BUS, 1940, silentDrop)
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canRxAdd(ECU_BUS, 1783, silentDrop)
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canRxAdd(ECU_BUS, 1477, silentDrop)
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canRxAdd(ECU_BUS, 1549, silentDrop)
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canRxAdd(ECU_BUS, 1738, silentDrop)
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canRxAdd(ECU_BUS, 1573, silentDrop)
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-- last option: unconditional forward of all remaining messages
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canRxAddMask(ECU_BUS, 0, 0, onAnythingFromECU)
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canRxAddMask(TCU_BUS, 0, 0, onAnythingFromTCU)
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everySecondTimer = Timer.new()
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_10msPeriodTimer = Timer.new()
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function onTick()
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if everySecondTimer : getElapsedSeconds() > 1 then
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print("rpm " .. rpm .. " pps " .. pps)
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everySecondTimer : reset()
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print("Total from ECU " ..totalEcuMessages .." from TCU " ..totalTcuMessages .." dropped=" ..totalDropped .." replaced " ..totalReplaced)
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end
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if _10msPeriodTimer : getElapsedSeconds() > 0.01 then
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_10msPeriodTimer : reset()
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end
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end
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