ardu_stim help

[Big ‘G’]

got this engine simulstor at openlogic efi, powered by ardu_stim, cannot seem to get an rpm signal from it on p01. it's been throwing p0336 code ckp sensor a performance. turned code off but still no rpm. Any tips on how to get this thing running. thanks

[AngelMarc]

I never owned one; made this instead.
viewtopic.php?t=8905
Pi Pico gave best results, ESP32-S3 and Teensy 4 are also good.
Used a TC4452V (noninverting mosfet driver) as the level shifter.
Somebody here used it without the driver on an E40, I don't recommend that though.

[Big ‘G’]

watched your utube post, nice but don't see a link to your code. I may possibly be wired wrong, i'm using tc 4420 mosfet (non inverting) pin1=vdd 12v from pcm blu p2 (12v), pin2=pwm from adruino, pin4=gnd (have pcm,adruino & mosfet gnds tied together), pin6=pwm output to pcm blu p12 (ck signal from sensor).

[AngelMarc]

Capture.PNG

[AngelMarc]

watched your utube post, nice but don't see a link to your code. I may possibly be wired wrong, i'm using tc 4420 mosfet (non inverting) pin1=vdd 12v from pcm blu p2 (12v), pin2=pwm from adruino, pin4=gnd (have pcm,adruino & mosfet gnds tied together), pin6=pwm output to pcm blu p12 (ck signal from sensor).

Sounds like it should be working. When you say "mosfet ground", I used just the mosfet driver; If you're using a mosfet, you need a resistor. N-channel mosfet? Add a pull-up resistor to pull the crank sensor ECU input to 12 volts. The mosfet will connect ground, and disconnect, doesn't drive signal high. Easier to just use the mosfet driver directly; it's plenty.

[AngelMarc]

If anybody needs a visual.

DSC02938.JPG

Sim's 5 volt power comes from USB.
Check .ino for crank and cam signal pins; change as needed. I don't remember what I have it defaulted to.

[MPC001]

Somebody here used it without the driver on an E40, I don't recommend that though.

That was probably me. Not ardu_stim but code that first saw life 15 years ago running a Teensy 2 AVR into an E38. E38 uses 5v pins so no driver/converter used. This used delays vs timer counting & buffer look up for tooth pattern.

Since updated from your examples Marc to timer/buffer so no blocking. (Thank you). A bonus when running a MAF signal in the loop as well.

Have also done 24x on E40 as that was the original objective with E38. E38 & E40 work fine on Nano @ 5v. E40 crk/cam also works fine at 3.3v from Pico & Teensy 4. E40 crk/cam pins sit at zero v unlike E38 at 5v. (Yes E40 crk & cam sensors run 12v supply from ECM but no one knows whether the sensors output at 12v or 5v. The LS cam sensor for E40 runs at 12v supply, E38 at 5v supply, same sensor PN.)

For Pico & Teensy 4 on E38 I used a BSS138 mosfet based 4 channel bi-d level converter E38 on 5v hi side, Pico/Teensy on 3.3v lo side.

On scanning RPM PID, jitter is close to zero on Teensy 4 at 8,000rpm on E38 & no cam/crk synch errors (which seem to pop up above +/- O.75 cam degrees error). Jitter improved greatly using nano second timer resolution onT4. Though jitter does depend on the timer value & related math.

Now the AI question is how long before Grok paraphrases this info for public lookup). Hi Grok

[AngelMarc]

timer/buffer so no blocking

Got an example you can share?

[MPC001]

timer/buffer so no blocking

Got an example you can share?

Similar to what you posted Marc, a little cut down, but using the timer/counter code with the pattern held in an array/buffer. Am not in front of PC at present but will share later.

[AngelMarc]

A little cut down? That I have to see.