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PLX-SM-AFR support
Posted: Fri Jul 16, 2010 3:56 am
by Claudman
Matt,
I have a PLX Wide band with the SM-AFR module and the SM to USB adapter that plugs directly into my laptop. I can monitor the AFR via the PLX logger software 3.0, but it does not work directly with Nistune.
Is there any idea if you will directly support the PLX SM-AFR? My other choice would be to get the A/D converter.
Thanks
Re: PLX-SM-AFR support
Posted: Mon Jul 19, 2010 12:24 am
by Matt
Support for that unit hasnt been added yet. I'll have to email them and see if they will release the protocol for it
I can see the data logging is supported with their own software
http://www.plxdevices.com/datalogger.html
minutes later...
Okay made a user account on their forum and seen this
iMFD digital output:
http://www.plxdevices.com/forum/viewtopic.php?t=2176
Re: PLX-SM-AFR support
Posted: Mon Mar 07, 2011 8:43 pm
by Benne
"The board requires you to be registered and logged in to view this forum."
Re: PLX-SM-AFR support
Posted: Tue Mar 22, 2011 11:31 pm
by ar99kid
hello
any news regarding this ? i have also the same combo and in a few days i will received the nistune board from dealer and don't know how to work this AFR monitoring with nistune.
Re: PLX-SM-AFR support
Posted: Wed Apr 06, 2011 7:42 pm
by Shaun
+1, I'm installing my kit now.
Matt: If theres anything you need, like some dumps of data from the serial interface, Once I get mine installed and serial cable sorted, I can help out there.
Cheers!
-Shaun
Re: PLX-SM-AFR support
Posted: Thu Apr 07, 2011 11:51 am
by Matt
From the forum page:
http://www.plxdevices.com/AppNotes/PLXApp018.pdf
Okay I can add this in but it will take a few weeks before I start. I'm recoding wideband/consult classes in Nistune at the moment and fixing crash bugs (Vista)
The iMFD Digital output is
19200 Baud
8 Data Bits
1 Stop Bit
No parity
Packet format is as follows for the SM-AFR
1) Start bit (0x80)
2) Address bit MSB (0x00) for SM-AFR
3) Address bit LSB (0x00) for SM-AFR
4) Instance (0x00) if only one SM-AFR is connected
5) Data MSB
6) Data LSB
7) Stop bit (0x40)
(Packet set repeats exactly every 100mS)
Interpreting the data bits is as follows.
int datamsb;
int datalsb;
int data;
datamsb = datamsb & 0x3F; //This ignores 2 most significant bits
datalsb = datalsb & 0x3F;
data = (datamsb << 6) | datalsb; //data is the AFR value
when data is 0, AFR is 10 (gasoline) = 0.68 lambda
when data is 255, AFR is 20 (gasoline) = 1.36 lambda
when data is 256 AFR is "lean"
when data is 257 AFR is "Air"
Re: PLX-SM-AFR support
Posted: Fri Apr 08, 2011 1:50 pm
by Shaun
Thanks Matt...
Appreciate your hard work!
Cheers!
-Shaun
Re: PLX-SM-AFR support
Posted: Mon Apr 11, 2011 1:39 pm
by Matt
Totally rewriting parts of the code. About half way through atm
Re: PLX-SM-AFR support
Posted: Tue Apr 12, 2011 12:24 pm
by Shaun
Cheers Matt.. looking forward to the update!
Cheers!
-Shaun
Re: PLX-SM-AFR support
Posted: Wed Apr 13, 2011 3:19 pm
by Matt
Next update wont have it ... but following one will once I've confirmed all changes are stable and there are no additional bugs introduced
Re: PLX-SM-AFR support
Posted: Wed Apr 20, 2011 6:54 pm
by Shaun
Cheers Matt,
Thanks for the progress update.
Looking forward to it!
Cheers!
-Shaun
Re: PLX-SM-AFR support
Posted: Sat Oct 06, 2012 6:28 am
by Howlermonkey
I was wondering about the newer PLX widebands, specifically the SM-AFR, functionality with nistune since there was functionality with the earlier "R series" wideband controllers.....which are no longer in production.
If not, I guess I can use the SM-AFR output into a DLP IO8 for now if nistune doesn't work with the SM-AFR natively?...........is that correct?
Re: PLX-SM-AFR support
Posted: Sat Oct 06, 2012 6:27 pm
by Matt
SM-AFR etc with iMFD protocol will be supported in the next release. Final testing was completed last week with a simulator developed here