MS2/Extra pre-3.4 alpha 6 released

[jsmcortina]

To announce the release of "MS2/Extra Pre 3.4 alpha 6" this follows pre-3.4 alpha5

ETA on this 3.4.x code becoming release is 6-12 months.

Who should use this code?
Experienced users wanting to test the new features.

Who should not use this code?
New or casual users - please use the current release code instead - see the Downloads page linked above.

Main changes since pre-3.4 alpha 5
Bug fixes:
Range check serial TX buffer.
Megaview temp units show degC.
Extend srlbuf size and add more buffer range checking. (Watch out for stack overflow.)

Changed features:
Allow cam polarity to be flipped on custom decoders.
More generalised 'edge2' handling.
4G63 uses 'edge2' to allow cam to be flipped. (Tested.)
Start of CAN 0x561 fuel flow.

Minor/internal:
dualTable tooltip.

The zip can be downloaded from:
http://www.msextra.com/doc/ms2extra/fil ... alpha6.zip

Be sure to read the RELEASE-NOTES.txt and README.txt. Especially note that "Not Synced" has been renamed to "Not RPM synced".

The current TunerStudio (2.6.0 or later) is required.

James

[sd1nl]

I was expecting the closed loop idle stepper bugs to be sorted now....

[nathaninwa]

I see on this firmware and the 1.4.5 there is a flipped trigger wheel option for the 4g63 cas. But cant seem to find it unless its the hires flipped polarity option?

Im running a 4g63 cas mounted to a dist and had to flip the stock wheel to get it work and have been experiencing an igniton stumble ever since I got the engine running and cant seem to find it

[acab]

Start of CAN 0x561 fuel flow.

Nice, but very hard to realise ;(

[jsmcortina]

I see on this firmware and the 1.4.5 there is a flipped trigger wheel option for the 4g63 cas. But cant seem to find it unless its the hires flipped polarity option?

Im running a 4g63 cas mounted to a dist and had to flip the stock wheel to get it work and have been experiencing an igniton stumble ever since I got the engine running and cant seem to find it

That option isn't designed to do that, it is polarity electrically filpped, not for a mechanically upside down disc. EDIT: the field name is correct.

James

[acab]

James, i found interesting idea. Now you did can realtime broadcating
Many cars have in dashboard display, and we can show some info on it for example, when push button (pe0/pe1/ad6/ad7)

[ol boy]

I put over 10 hours of driving on this code since Friday morning without any issues.

[Buelliholic]

now tested and the CAN Realtime Data Broadcasting to the Dash2Pro is working very nicely with 10Hz setting too

[jsmcortina]

now tested and the CAN Realtime Data Broadcasting to the Dash2Pro is working very nicely with 10Hz setting too

That's great news. Thanks for sharing.

James

[ol boy]

How often is MAF sampled throughout the engine cycle? Is there any feature similar to the way MAP is averaged to smooth out any small fluctuations in the MAF reading? Did the 3.3.3 line get any enhancements to MAF that didn't get pushed to 3.4 alpha 6?

Thanks Ryan

[jsmcortina]

How often is MAF sampled throughout the engine cycle? Is there any feature similar to the way MAP is averaged to smooth out any small fluctuations in the MAF reading?

I checked and no there isn't.
The "real deal" MAF implementation is in MS3, but unfortunately it isn't not possible to implement that on MS2 (it has 4k of RAM would needs at least another 1k.)

Did the 3.3.3 line get any enhancements to MAF that didn't get pushed to 3.4 alpha 6?

No, no difference that I'm aware of.

James

[ol boy]

James, what is ment by "real deal" ? Can ms2 not sample the MAF line at a known crank angle every time and then average 4 samples? What values are pushed through the lag factor? I've used 10 to 100 and I can't see much difference at all it how stable or unstable the g/s display is or any other indicator that the lag factor is even working. The adc7 values are quite all over the place but those values displayed are the raw values and the lag factor is not applied.?

Thanks Ryan

[Spockietech]

Greetings James,

I was wondering if the CAN *Receiving function discussed here http://www.msextra.com/forums/viewtopic ... 25&t=53116 is planned to be included in the Ms2/Extra Code ?

I would like to be able to feed a bunch of parameters acquired from an Arduino with a CanBus Shield as discussed here http://grassrootsmotorsports.com/forum/ ... 593/page1/ into my MS2 with 3.4 Alpha 6 Code.

Initially, I believed from that page, that the Ms2 with 3.4 code could do it, but I see after some digging around through the code, that it has the broadcast, but not the receive function that the Ms3 has. Doh. Got my 6 Thermocouples all hooked up and ready to go with the 'duino too.

So, am I going to have to move over to MS3, or is it likely to included in the MS2 any time soon ?

Either that, or Ill have to code up a poll/response bit I suppose..

regards
Brett

[jsmcortina]

The big holdup is lack of RAM on the MS2 chip. I have some revisions to the CAN code in mind that _may_ allow the receiving, but no promises.

MS3 has over 16x the RAM, so features like this are possible.

James

[Spockietech]

OK, Thanks for letting me know.

Ill see if I can manage an Ms3 Upgrade soon if I dont hear anything by the time all the electronics are coming together.
Or Ill figure out how to do a full Can Poll/Response in the 'duino rather than the simplified receive function

[jsmcortina]

James, what is ment by "real deal" ?

MS3 does a curve lookup and averages the MAF _flow_ values, not the ADC counts. There isn't enough RAM on MS2 to be able to do that.

James

[ol boy]

James, what is ment by "real deal" ?

MS3 does a curve lookup and averages the MAF _flow_ values, not the ADC counts. There isn't enough RAM on MS2 to be able to do that.

James

would averaging ADC use less RAM?

Uhm.. I ended up adding a 100uf cap after the 1K resistor to help smooth everything out but ending up causing a cranking/start up issue. The Ford MAF sends the output signal high briefly which charges the cap and gives false g/s values as the voltage slowly bleeds down while cranking and starting which then floods the engine with extremely high PW. Toss in a lag factor of 20 for the MAF value... I now have to wait until the fuel pump stops running before cranking which gives time for the MAF value to settle back down to 11 ADC.

I do have MAF working well and now have a fairly stable PW and ARF readings. I was worried at first as the MAF ADC and g/s were all over the place. With lag factor of 10 the values were still over the place.

I have a buddy that is heavily involved in Fords EEC IV and V ecus which both run on MAF. His volts/ADC and kg/hr values jump about quite a bit also. I can only assume the noise output from a MAF is normal..?

Fun, fun.

[jsmcortina]

I'm just looking at MAF averaging now.

James

[ol boy]

How big is the array for CL idle averaging? Can that be shortened up a tad? I've put some big values in that...

[jsmcortina]

How big is the array for CL idle averaging? Can that be shortened up a tad? I've put some big values in that...

The MS3 implementation uses WAY more RAM than is possible to find on MS2.

James