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Summary of change:
'''Firmware 1.0.x config for trigger''' family, '''where we sync on the short gap''' (instead of the missing tooth bigger gap): The '''fiatstilo bit must be enabled for both primary_trigger and secondary_trigger'''. Worked with an earlier firwmare with fiatstilo style cam. Totally reworked so basically any reasonably cam pattern is supported (setting another_trigger_tooth) Tested with 1.0.68 firmware, 4 cyl wasted spark subaru trigger setup. (1.0.75 or latest release recommended) examples: * InputTrigger/SubaruTrigger 55 + 93 + 32 degrees * MembersPage/FiatStilo 60 + 90 + 30 * MembersPage/AttilaSzucs * InputTrigger/HondaFTwentyTrigger 12 x 30degrees + 10 degrees As you see, we neglect longer gaps (150 .. 200% relative), and trigger on the shorter gap (appr 30 .. 34% relative). '''Primary trigger settings''' * primary_trigger=29 (decimal 41) that is: ** multitooth (bit1=0) ** multitooth advanced filter ON ** '''fiatstilo ON''' bit5=1 ** rising edge * multitooth advanced filter (you can tweak these advanced filter tresholds): ** toothrel_normal=01 ** toothrel_missing=F0 # or in megatune words: ** normal tooth: 16 .. 100% ** missing tooth: 125 .. 300% * tooth_wheel=02 '''secondary_trigger''' If you have a distributer, disable (secondary_trigger=02). Without distributer, camsync is needed! GenBoard/Manual/InputTriggerCamSync but there is something special about the implementation, so it is easiest to set at least the missing tooth toothwidth to 0. (there can be several working setup). * reset_engphase_after=04 * tooth_wheel_twidth1=00 * tooth_wheel_twidth2=00 '''secondary_trigger=59''' (decimal 89) that is enabled, strig_camsync, coil type, rising edge * enabled (bit1=0) * filter OFF * '''fiatstilo ON''' bit6=1 * although ''secondary_trigger=57'' apparently made no difference on 1.1.6x, that is untested <code> uint8_t secondary_trigger; // trigger2, bit0 0:falling/1:rising, bit1 0:enable/1:disable, bit2 1:filtering, bit3 0:toothwheel/1:coil, bit4 0:alien advance/1:cam sync, bit5 1:both edge at cranking bit6:fiatstilo </code> '''Tricks:''' * trigger_tooth=00 # currently neglected, use 00 for compatibility * another_trigger_tooth=03 # for subarutrigger The another_trigger_tooth refers to the cam_counter, that is we cam_sync after the 3 consecutive camtooth seen (see InputTrigger/SubaruTrigger). Set to 01 if you only have 1 camtooth. Investigation at MembersPage/SkassaTriggerSubaru: another_trigger_tooth=03 might interfere with ignadv actuation ? * If RPM reading is good (not half or double, can you check ?) with rpmk[0]=0B and rpmk[1]=B8 ** The rpm is right,Skassa * than spark ignadv should be OK (calculated from same "rpm_period" internal variable with function (ign_tdcdelay-ignadv)*rpm_period*const time after the pulse (at which we detect shortgap) ---- '''No surprise (4 cyl)''': * ignchmax=03 # for 4cyl * Wasted spark is recommended, eg h[2]=02 03 02 03 .., * rpmk[0]=0b # for 4cyl * rpmk[1]=b8 # for 4cyl ---- == Trigger Settings == The following settings can be used to default the Subaru/Fiat Stillo trigger settings. You will still need to adjust the ign_tdcdelay (TDC after the trigger in MegaTune) to tune the ignition advance. <code> primary_trigger=29 toothrel_normal=01 toothrel_missing=F0 tooth_wheel=02 trigger_tooth=00 another_trigger_tooth=03 secondary_trigger=59 tooth_wheel_twidth1=00 tooth_wheel_twidth2=00 crank_minper=00 cam_sync_r_edge_phase=00 cam_sync_f_edge_phase=00 reset_engphase_after=04 </code> ---- '''Other trigger wheels that fall in this category''' Someone pasted this link on irc: http://vemscdi.narod.ru/VR.jpg This looks like a variant of the "short-gap-trigger", should be possible to make it work with 1.0.x + proper configuration and benchtesting. We will help the setup after he makes his MembersPage. ---- '''1.1.x firmware with fiat stilo / subaru trigger''' As of 2010-01 fiatstilo/subaru trigger is '''only supported in 1.0.x''', not 1.1.x. If you benchtest, here is some hint: * with toothwidth=55 degrees (55 for subaru, 60 for fiatstilo) the spark is at the proper position: assuming spark is advanced BTDC (as normally), or retard < 55 deg, that is max 55 deg ATDC: easily achieved especially in 1.1.6x. ** but measured actual dwell time varies. VemsTune gauge is stable (say 2.8 msec), but the dwell on the real output varies. Reason: the ECU times from last possible tooth, but calculates with the configured constant 55 (or 60) degrees distance between teeth, which is not true before the triggertooth (only after that).
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