Jim Blackwood wrote:Picked up a bit more. v3.01 board is similar to the v3.57 except not premanufactured? So the features are more or less the same it looks like. Works for me. However, it seems EGT inputs have to come off an extender board like the GPIO. With my GPIO being used for the transmission it doesn't seem like inputting the EGT's there would work out too well, and it doesn't sound like the MS3X has enough inputs to accommodate them either. Is this a correct assumption?
Which would seem to indicate that I have the choice of either not using EGT inputs (not the end of the world), or possibly getting really crazy with the controller and adding *two* GPIO boards in addition to the MS3 and the MS3X.
Is that it, or do I have another option?
Jim Blackwood wrote:Good, that helps a great deal.
So, using the MS3X for transmission control would mean sharing processor time with the MS3, possibly slowing down shift commands slightly. (The factory Lexus controller has this issue.) Conversely, using the on-board processor of the GPIO should be faster?
So the new paradigm would be:
-MS v3.01 motherboard
-MS3X extender for sequential, COP, and possibly 8 EGR inputs
-GPIO for transmission control
Plus a new case to fit it into. This would let me also retain my onboard knock sensor I have in the proto area of the v3.01 board. I like that idea.
What are the advantages of using the v3.57 motherboard over the v3.01 board?
muythaibxr wrote:You could use James' transmission code that runs on a microsquirt as a transmission controller.
Jim Blackwood wrote:Thanks, I really appreciate the advice. For the transmission I am planning on using MegaShift and this is where it gets a little confusing for me, as I want to get everything to work together. Lance was unable to make any suggestions that went beyond MegaShift, although he has been a very big help in doing the preliminary work to get it to work with the 8 speed Lexus (Toyota) automatic. But I'm still not real clear on what exactly is required in the way of hardware. I thought the MegaShift used the GPIO board and simply connected via CAN to the MegaSquirt controller, whether MS2 or MS3. At my present level of understanding (or lack thereof) my impression is that I need:
-v3.01 motherboard, which I have, for engine control and basic input/output. It has a basic, ungated KS circuit but it is not being used to automatically vary timing. It lights an indicator on the side of the case and is somewhat useful in determining max advance under restricted conditions if carefully adjusted using a knob on the side of the case. I believe it is connected to a usable input but will have to find my circuit diagram. It uses the KS circuitry developed by one of the established members of this forum but for the moment his name escapes me, but it pretty well uses up all of the proto area real estate. This motherboard also accepts an input from the LM-1 WB, and is configured for EDIS and 2 wire PWM IAC (Ford). SPR1 and SPR2 are still reserved for CANbus use.
-MS3 needed to allow the use of sequential, COP, and independent EGT as well as greatly refined autotune. SD chip datalogging is a potential plus.
-MS3X needed for sequential, COP, and EGT inputs. The question is, can the 8 EGT inputs be brought in on this board? My information so far seems to say no. If not, is it possible that retaining the EDIS instead of going to COP could allow it? I'm doubtful. Does this mean an additional GPIO is required for EGT or is there another alternative? Perhaps the JBPerf IO-X is the answer and I will look into it. Are they a certified Vendor? All I really know about them at this point is that Bill Jacobson used their services and had very good results. But they weren't on the vendor list I found. I've bought from Glen's garage mostly in the past, after we quit doing the group buys so much.
-GPIO needed to run MegaShift. http://www.msgpio.com/forums/viewtopic. ... ec15fc292a Independent from MegaSquirt but using inputs and providing outputs via the CANbus.
This board has to control 9 solenoids, 7 of which are PWM. One more could be PWM but I do not think so. We have most of the details worked out on the other outputs and dozen or more inputs but we are taxing the limits of the board and it will only work if we bring in as many inputs as we can off the CANbus. I do not foresee any option for bringing in the EGT here.
So to simplify, it looks to me like I need the MS3, MS3X, GPIO for MegaShift, and probably the IO-X. Does that sound like it makes sense to you guys?
Jim Blackwood wrote:OK, just wondering. What do the guys who have 8 COPs to drive do? Build a coil driver box? I was sort of hoping there was a way to get everything in one enclosure but if there's not then there's not. It would be one more tick in the column for keeping the EDIS I suppose, but the individual COPs would look pretty good I think.
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