soapypanther wrote:
Arttu, I would love to get a collaboration going. I am running MS3 on my DD and would love to start with that one. I was thinking I could keep the pinout the same on both the DIP and the headers. Thoughts? Maybe even the dimensions could be kept the same. This way, I can swap back and forth on the fly.
That's exactly what I had in my mind. To keep pinouts, electrical functionality and critical dimensions identical. Generally make swapping back and worth as easy as possible.
I am a little busy at the moment as well, I just started medical school and the work is piling up. This is just my hobby though, and I find fiddling with my car theraputic. Im going to start drafting a daughter card this weekend I hope. What priorities do you have for the card Arttu? I would like to include serial communication chip, a MAX chip for VR conditioning, the crystal and assiciated clock circuitry. Anything else you think I should add? I think I could have a couple done for less than $100 each I hope.
I think there should be all necessary support circuit for the processor (naturally) and serial to USB interface. I think those are the essential parts. Then maybe real time clock and knock circuits too but I'm not sure about these since I'm going to add them on next version of my main board. I'm not sure if it's a good idea to put VR conditioners on the processor board since usually there is some kind conditioner on the main board.
I think $100 is quite realistic target price for a small batch. The first prototypes will probably cost a bit more since this will require a multilayer PCB (most likely).
What are your vehicle specs? Im running a BMW straght 6, COP wasted spark and batch fire high Z injectors. I have a VR sensor on a 60-2 wheel at the crank and a funny proximity sensor on the cam not currently used (hopefully soon to change). I may use a schmitt trigger to simulate a hall signal or take care of this in the code perhaps.
It's an aircooled inline 4 bike engine (Suzuki GSX1100), turbocharged, COP sequential ignition, staged injection with dual injectors, crank and cam triggers with hall sensors. Current crank trigger has 6 evenly spaced theet but I'm going to change it to 24-2 and VR sensor. I realize that most likely I can't do all this with current FreeEMS software but it's a good start if I can just get the engine running.
You can send me a private message or email me directly (arttuh <at> iki.fi). Let's see what kind collaboration we can do. I see you probably want to design your own board and build your prototypes too. Unfortunately I have the same desire
But at least we can work together with processor and connector pin mapping. I think that would be a big bonus already.
I set it up in the stock ECU case with stock bosch IGBTs for the coils (they have their own grounding plane and grounding pin). Its more or less exactly as the stock Siemens ECU was configured with an MS2 chip in place of the stock CPU. I'll see if I can dig up some pics. All I have here are the PCB files. 
