Support stepper with TLE8888

[rusefi]

looks like microRusEfi hardware is set to use two H-bridges for stepper control already. Maybe it would be possible for TLE8888 to control stepper IAC?

This task probably consists of TLE8888 initialization part and generic #1088

[rusefi]

@dron0gus would you be interested to implement the TLE8888 initialization part or the whole change?

[mck1117]

Hmm, this may actually be zero additional work once #1121 goes in. The tle8888 outputs just need to get configured as DC motors (which you'll be able to do with #1121, since they're just normal GPIO), so this may just work.

[dron0gus]

@mck1117 I agree.
We can just hack/modify tle8888 driver, so OUT21..OUT24 will be initialized as Push-Pulls.
Or
We can use ->setPadMode gpio-driver hook to set OD or PP mode. This is not implemented yet, I can do it.
But, in #1121 you are using DcMotor which is using SimplePwm which is initializing OutputPin with simple initPin(msg, brainPin) without special mode... So gpio-driver hook will be called with OM_DEFAULT mode. As it is done for all other pins used in Open-Drain mode.
There is some mess with output pin modes. For example for Injector pins we shouls use OD mode when using external gpio-chip. And push-pull when MOSFET is driven directly from MCU pin.
Also there is some mess with logic levels. We pass '1' to gpio-chip to open MOSFET and actually output '0'. Same question for Push-Pulls output of TLE8888. What value should be set on output when output is PP and tle8888_writePad(data, pin, 1) is called?
Sorry for offtopic.

[mck1117]

I think for now we could just make those tle8888 outputs permanently pushpull, and come back around to setting them properly later.

re: polarity, for a stepper it actually doesn't matter. So for this particular use case nobody will notice if it's inverted or not, since the stepper will still work fine. We should open a separate issue for figuring out what to do about tle8888 (and similar gpiochip) outputs with a configurable mode.

[dron0gus]

413839f and 342c624

[rusefillc]

Next step: need to be tested in US

See #1936
See #1125

[rusefillc]

JRD McLAREN 4:58 AM
(IDLE stepper coil 2+) are twice on https://rusefi.com/docs/pinouts/microrusefi/ on PIN33 and PIN43 ..
4:58
one of them seems to be "minus" ...

[dron0gus]

TLE8888 fix #3748
Settings #3749
Code #3751

[dron0gus]

@rusefillc done?