RE-Vision

Preface - I searched.

Anyone ever get around to logging the CAN PIDs from the S1?

NotAPreppie

I may be able to work on this in a month or two. I have the parts to build an Arduino CAN logger but I lack the time.

If you use OBD Fusion on your mobile device, you can buy the $10 add-on pack to get access to all of Mazda's private PIDs. They're listed by name so you'll have to jump through some packet sniffing hoops to match up names to actual PIDs

dannobre

iTrader: (3)

What are you trying to do? I have some of the CAN stuff.. Dash and wheel speed and stuff to make the power steering work. and have a CAN sniffer.... but don't have a functional car right now to do any logging

I hope to use a buddies car and do some logs at some point 5o see if I can figure out more stuff

RE-Vision

Trying to get some useful information and a better throttle trace from RaceCapture MK2.

dannobre

iTrader: (3)

Just get a Reader that reads the Mazda extended PID's. Doesnt sound like you need the actual CAN info for what you want.

TeamRX8

iTrader: (25)

I’m sure many are common, but there are a few unique ones for RX8 not on here; they got a few from this forum:

https://forum.miata.net/vb/showthread.php?t=631418

RE-Vision

Looks like the mother lode. Thanks~!

TeamRX8

iTrader: (25)

2004-

TeamRX8

iTrader: (25)

2006-2008 w/changes-differences from 2005

SportRotary

This link has proven to be accurate for my purposes:
Mazda CAN Bus ? Madox.NET

I don't have a Renesis or stock ECU, but I'm logging the individual wheel speeds to my RaceCapture. I'm also using the RaceCapture to send CAN data to the OEM gauge cluster via a Lua script - https://www.rx8club.com/series-i-eng...luster-268611/

Throttle position appears to be 0x201 byte 6. Scale is divide by 2.

trackjunkie

i have AIM solo DL 2 and have tried different protocol to log the brake pressure but none seem to work.

RE-Vision

I don't think the S1 ECU will communicate that (steering and break pressure) data over CAN. I am going to see about RPM, Brake (just on or off) and Throttle tonight.

TeamRX8

iTrader: (25)

Well maybe you’re confused; the only CAN data in a displayable format are the items listed in the Mazda PID/DATA list per the Definition and Unit/Condition parameters as indicated in my posts above.

Which neither of those are listed or formatted for what you’re seeking. You’d have to install the devices and setup the software parameters for both on your own to have that data.

SportRotary

Pages 20 and 22 of the electrical FSM show the steering angle sensor connected to the CAN bus on DSC cars. I have a non-DSC car, so I can't test it. But the link I shared above ID's the steering angle data @ 0x4DA bytes 0 and 1. I would bet that it's available there.

Just because data is not available via OBD, that doesn't mean that it's not floating around on the CAN-bus somewhere.

TeamRX8

iTrader: (25)

Well that’s assuming angle is actually being measured rather than some other value. It still might serve as a reference value, hard to say without the actual data. I’m aware of it for the ND MX5; not the NC/RX8, but then I don’t claim to be fully informed on the subject.

I’ll concede that it’s more likely for there to be a steering angle value than brake pressure value by virtue of the devices being used. It’s possible that some of the data didn’t exist until later in the production cycle, either during the S2 or after RX8 production ceased. The NC thread stated that they couldn’t get those to work.

Mr. Pockets

I didn't see this thread.

I have a RaceCapture Pro Mk3, and I have the throttle position sensor mapped. If you like, I can send you the channel info when i get home tonight.

Incidentally, I've had nothing but trouble getting OBDII channels working. If i map even one, it messes with the car. Are you mapping any OBDII?

RE-Vision

I did map OBDII but ended up gimping my racecapture somehow over the weekend.

OBDII maping works if the PIDs are in passive mode. I presume you had the gnarly engine cut outs above 8k?

Would love to see what you have for throttle trace on CAN.

TeamRX8

iTrader: (25)

need to improve those GoogleFu skills:

https://forum.autosportlabs.com/view...fb7e14105f3335

.

Mr. Pockets

1. On that forum, Dadspeed is me.

2. It did not work, and Brent has spent the last year and a half not solving the problem.

I actually forgot entirely that I posted on that forum. I didn’t find it useful.

RE-Vision

Is the throttle trace you get useful?

Mr. Pockets

I use CAN for throttle, RPM and wheel speed. They are all very useful. This is what my CAN Mapping page looks like in Imax:




Also note that the CAN channels are set to big endian.

One little, two little, three little endians...

RE-Vision

That's fantastic. I had a thought that maybe some kind of math channel for steering angle could be made by calculating the difference between the two front wheels.

Mr. Pockets

Steering angle has got to be available via CAN.

Interesting, this document shows what CAN PIDs AiM can log with their devices:

https://www.aimtechnologies.com/supp...08_105_eng.pdf

I wish I could get those parameters. I would really like to be able to display fuel level grrrrrrrr.

RE-Vision

I'm going to try to get brake on/off working this week, hopefully it isn't too hard

Mr. Pockets

I would be super happy to hear about it if you do. I have a brake pressure sender pipe, I just haven't gotten the sensor yet.