t vago's MPGuino workspace thread

[t vago]

Originally Posted by Ardent

I can't definitively say that DFC was invoked prior to the glitch as the only time I think I witnessed the whole progression of what was displayed was the instance of accelerating from a stop. The other instances though all occured on a resumption of power from 0% TPS and never during steady state operation.

Very interesting. That does not sound like a DFCO-induced "----". Did the RPM display do the same thing? (it's the upper right display on the "Instrument" page)

[Ardent]

I wasn't on that page, so I don't know. Sorry.

[t vago]

Originally Posted by Ardent

I wasn't on that page, so I don't know. Sorry.

Sounds like you were on the Instant/Current and Instant/Tank pages. I'll flash the MPGuino in the Karen-Mobile with my latest-n-greatest code, then see if I can reproduce the issue you've seen. My 120 mile commute should hopefully make the issue repeat at least once. I'll also swap in the RPM display to each of them pages, and see if the RPM readout does the same thing as the fuel economy readouts do.

[Ardent]

Additional Data:

This morning after start-up and while on the Instant/Tank screen, things looked normal until beginning to back out. As soon as movement began (VSS pulse), iM went from "0.00" to "----". Stopping resulted in the display returning to "0.00". Resuming motion in the forward direction iM again went to dashes but as soon as I pressed the accelerator iM began displaying good values.

This afternoon, before resetting a decel-accel induced glitch I switched to the Instrument screen and rpm was "----" too.

[josemapiro]

The simultaneous buttons, are present following result.
Left + Middle -> 3 btn pressed
Middle + Right -> 6 btn pressed
Left + Middle + Right -> 7 btn pressed
Left + Right -> Goes to contrast
Extra# 2 -> 16 btn pressed

The result is correct, or should have a different outcome?

Thank you
José Rodrigues

[t vago]

Originally Posted by Ardent

Additional Data:

This morning after start-up and while on the Instant/Tank screen, things looked normal until beginning to back out. As soon as movement began (VSS pulse), iM went from "0.00" to "----". Stopping resulted in the display returning to "0.00". Resuming motion in the forward direction iM again went to dashes but as soon as I pressed the accelerator iM began displaying good values.

This afternoon, before resetting a decel-accel induced glitch I switched to the Instrument screen and rpm was "----" too.

Strange. It sounds like the fuel injector input isn't seeing anything to speak of, for those moments that "----" shows up. Can you revert to the old 0.86 code, and see if that behavior still shows up ("999999" instead of "----")? My fuel injector interrupt routine might be misbehaving (as it uses only one pin, instead of the 2 pins that the 0.86 code used).

Also, can you give me your microseconds/gallon number and your VSS pulse/mile number?

[t vago]

Originally Posted by josemapiro

The simultaneous buttons, are present following result.
Left + Middle -> 3 btn pressed
Middle + Right -> 6 btn pressed
Left + Middle + Right -> 7 btn pressed
Left + Right -> Goes to contrast
Extra# 2 -> 16 btn pressed

The result is correct, or should have a different outcome?

That behavior sounds correct.

Hold down the left + middle buttons for over 1 second, and it should reset the tank trip. Similarly, holding down the right + middle buttons for over 1 second should reset the current trip. This was a feature I added early on, because I wanted to have a kind of a failsafe against inadvertently resetting the current/tank trip data.

[Ardent]

I'll give the old code a try.

8226 PPM
247804090 usec/gal.

[josemapiro]

Originally Posted by t vago

That behavior sounds correct.

Hold down the left + middle buttons for over 1 second, and it should reset the tank trip. Similarly, holding down the right + middle buttons for over 1 second should reset the current trip. This was a feature I added early on, because I wanted to have a kind of a failsafe against inadvertently resetting the current/tank trip data.

Have tested the buttons and functions as described.
Now I have to test the car to see if it works.

Thank you
José Rodrigues

[t vago]

Originally Posted by Ardent

I'll give the old code a try.

8226 PPM
247804090 usec/gal.

I just had a thought - My injector interrupt routine has two separate rationality checks to ensure that the injector pulse being read is actually a valid pulse. The two checks reject pulses that are either too long or too short. It could be that your idle and just-off-idle pulses are being characterized as being "too short," thus being rejected. That would certainly cause what you're seeing.

Can you tell me approximately what RPMs you're seeing when the "----" occurs?