Datalogging output (to dash/logger)

Stuart · Post by **Stuart** » Mon Jun 23, 2008 11:15 am

the Knock count field,

Can you please explain the format of this field?

reading the help data, LSB is Knock, but is that LSB of byte 19 or 20?

also, can you explain the format of the rest of it.

(feeding this to an AIM MXL and it just treats it as a 2 byte number at the moment)

Stuart · Post by **Stuart** » Thu Jun 26, 2008 12:13 pm

Any danger of an answer guys?

Post by **Hondata** » Fri Jun 27, 2008 9:14 am

All 16 bit values are most significant byte first.

The knock count field contains the number of knock events since power on.

The scaling is least significant bit of the field = 1 knock.

Stuart · Post by **Stuart** » Fri Jun 27, 2008 9:40 am

In that case, something is not right...

this is what the AIM data looks like:

the red line is RPM
the black line is TPS
the orange line is Knock-count

as you can see, it's following TPS, almost like it's a combination of knock threashold?

the .xls is the exported data for the same lap.

thanks

Stuart

Stuart · Post by **Stuart** » Fri Jun 27, 2008 9:44 am

the data... (ziped up)

Post by **Hondata** » Mon Jun 30, 2008 7:59 am

The orange line looks like lambda.