Unless Jake does something, I am not planning realtime on N54, just the Bosch based DMEs.
MEVD17.2 emulation in development
- Thread starter LamboLover
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The DME? It could be interesting for high power single turbo N54 applications with the N55 cylinder head and sensors/actuators. The MEVD DMEs have much more generous scaling out the box for load, torque, pressure, and there is space for a lot more new calibration tables. You would have lower flow solenoid injectors instead of higher flow piezo injectors. Except its price, and crank hub problems, the S55 seems to be the golden child with its closed deck block, dual fuel pumps, but its DME is seriously stretched in memory terms for available RAM which I'm planning around, but it is a slight limitation for the quality of emulation. The N54's MSD8x has lots of free RAM, but hardly any free calibration. What seems free of all these problems? Audi RS models, McLaren MED17...
Level 10 expert only visibility for power usersI am about to confuse the crap out of most:
Ethanol content sensor frequency output -> microcontroller -> ethanol content (0.1% scaling so 1000=100% ethanol) -> CAN bus -> gateway > DME -> store result in memory backed up by EEPROM after driving -> this table to convert to ethanol %.
The flexibility here is to change the pointer to something else and scale the "ethanol" input how you like based on any variable you like. Originally this was going to be a voltage input from an ethanol content analyzer, but now it is from a CAN input. It could be a constant value that can be altered by flash or realtime tuning, a value backed up in EEPROM after driving as a map switch/blend value, some status from a water/methanol/port injection system...
Similar concept expandable to other features.
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Definetly not confusing and fairly straight forward. Great work man! Can't wait to realtime tune the MEV172 DME's.
Man, I wish one day I will be able to meet you and pick your brain. I'm a Web Engineer by day and aspiring automotive tuner/hacker by night. The stuff you are doing on these DME's will push the platform forward astronomically, and thank you for picking the correct partners!
I am glad the final logic makes sense.
ECU hacking is now pretty niche involving microcontrollers and assembly. That was stuff I picked up as a child hobbyist in the 1980s where there were books in the secondary school library on 6502 assembly language and a "computer" diary you might give to a geek child like me at Xmas had Z80 and 8086 instruction sets listed in it. So you still had to geek out and seek it out, but now although information is more available than ever, the interests and skills that drive ECU hacking appear to be dwindling as there are so many other things to do in IT, and unless specialized, a lot of IT and even CS education can turn out graduates that don't know (or haven't actually used to solve actual real world problems) what self taught people like me think of as the fundamentals of our craft.
After learning 8 bit assembly with only three registers, with restricted use, without a multiply instruction to having a 32 bit CPU with lots of general registers still makes my eyes widen. Even more magical is that GCC actually compiles stuff that runs on an actual ECU. That still surprises and delights me. When it doesn't, it is time to retire.
ECU hacking is now pretty niche involving microcontrollers and assembly. That was stuff I picked up as a child hobbyist in the 1980s where there were books in the secondary school library on 6502 assembly language and a "computer" diary you might give to a geek child like me at Xmas had Z80 and 8086 instruction sets listed in it. So you still had to geek out and seek it out, but now although information is more available than ever, the interests and skills that drive ECU hacking appear to be dwindling as there are so many other things to do in IT, and unless specialized, a lot of IT and even CS education can turn out graduates that don't know (or haven't actually used to solve actual real world problems) what self taught people like me think of as the fundamentals of our craft.
After learning 8 bit assembly with only three registers, with restricted use, without a multiply instruction to having a 32 bit CPU with lots of general registers still makes my eyes widen. Even more magical is that GCC actually compiles stuff that runs on an actual ECU. That still surprises and delights me. When it doesn't, it is time to retire.
Eesh, I at least got started with 16bit MIPS that could MUL in my few ASM courses in undergrad.
6502 was in the NES and the Z80...Sega genesis? But I think the Genesis was 16 bit so perhaps it was a 68k? I have forgotten
Further back. I am 43...
Atari 400/800XL/130XE were my first three computers in the 80s
Atari 400/800XL/130XE were my first three computers in the 80s
Further back. I am 43...
Atari 400/800XL/130XE were my first three computers in the 80s
One computer I have not seen in a very long time is an Amiga. I remember playing Silk Worm on that. Trying to download that game for my IBM resulted in getting a ROM and attempts to figure out what to do with it led me into emulation and my programming interests.
I did some assembly code on a fox 20(I think it was called) but haven’t used any knowledge of that for a very long time. I wish I’d have stayed with it now !
Further back. I am 43...
Atari 400/800XL/130XE were my first three computers in the 80s
heh. I have lots of catching up to do
Bench tests passed for early N55 E series to late N55 F series, DME work is complete if it all tests OK in cars.
Realtime/emulation working in my Audi too, that was a PITA working out how to get through the gateway, but the hours of bench testing have worked.
TO DO: In car testing, finish firmware for interface for the ethanol content sensor/realtime tuning, write a WinOLS plug in for the VAG emulation as the market for those doesn't use TunerPro as VAG tuners have a legacy of files I will need to inter-operate with.
Realtime/emulation working in my Audi too, that was a PITA working out how to get through the gateway, but the hours of bench testing have worked.
TO DO: In car testing, finish firmware for interface for the ethanol content sensor/realtime tuning, write a WinOLS plug in for the VAG emulation as the market for those doesn't use TunerPro as VAG tuners have a legacy of files I will need to inter-operate with.
In car test on E92 335i is good. The half check engine light with "chime" and the central display with half an engine show and disappear when they should in response to the custom errors. CAN ethanol content getting through the gateway. Few more checks, but looking good.
Man I can't wait. I have so many things I want to try that aren't practical without live tuning. Not to mention the additional safety and flex fuel. E54 is what we have at the pump here and it's what I run for convenience even though E40 seems to be the sweet spot. With flex I can mix without pulling out a calculator every time and if I'm off it isn't a big deal.
FWIW, this is a log of our bone stock 335i DCT running stage 1 plus (prob an old version from November) on 99 RON, 43000 miles, spark plugs less than 10000 miles, standard charge pipe LOL, but in this case, the main tuning related tables are running from gasoline and ethanol identical copies without a real ethanol content sensor, but since the pairs are identical, regardless of the ethanol content and blending it should look identical to a stage 1 plus log of the same version. Nothing looks surprising to me.
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