Portenta H7 (and probably others) - How to all possible pins for GPIO?

[KurtE]

Hi: @facchinm @pillo79 @mjs513 and all

I thought it might be better to start a discussion, instead of continuing on the issue/PR.

I am glad to see that most of the one PR was applied. I understand that you do not wish to pollute the device tree with lots of
extra things.

The current pin list that was merged in, I believe is:

	zephyr,user {
		digital-pin-gpios = <&gpioh 15 GPIO_ACTIVE_LOW>,	/* D0 */
				    <&gpiok 1 GPIO_ACTIVE_LOW>,		/* D1 */
				    <&gpioj 11 GPIO_ACTIVE_LOW>,	/* D2 */
				    <&gpiog 7 GPIO_ACTIVE_LOW>,		/* D3 */
				    <&gpioc 7 GPIO_ACTIVE_LOW>,		/* D4 */
				    <&gpioc 6 GPIO_ACTIVE_LOW>,		/* D5 */
				    <&gpioa 8 GPIO_ACTIVE_LOW>,		/* D6 */
				    <&gpioi 0 GPIO_ACTIVE_LOW>,		/* D7 */
				    <&gpioc 3 GPIO_ACTIVE_LOW>,		/* D8 */
				    <&gpioi 1 GPIO_ACTIVE_LOW>,		/* D9 */
				    <&gpioc 2 GPIO_ACTIVE_LOW>,		/* D10 */
				    <&gpioh 8 GPIO_ACTIVE_LOW>,		/* D11 */
				    <&gpioh 7 GPIO_ACTIVE_LOW>,		/* D12 */
				    <&gpioa 10 GPIO_ACTIVE_LOW>,	/* D13 */
				    <&gpioa 9 GPIO_ACTIVE_LOW>,		/* D14 */

				    <&gpioz 0 GPIO_ACTIVE_LOW>,		/* A0	 ADC2_INP0 */
				    <&gpioz 1 GPIO_ACTIVE_LOW>,		/* A1	 ADC2_INP1 */
				    <&gpioz 2 GPIO_ACTIVE_LOW>,		/* A2	 ADC3_INP0 */
				    <&gpioz 3 GPIO_ACTIVE_LOW>,		/* A3	 ADC3_INP1 */
				    <&gpioz 4 GPIO_ACTIVE_LOW>,		/* A4 hack for duplicate PC_2 */
				    <&gpioz 5 GPIO_ACTIVE_LOW>,		/* A5 hack for duplicate PC_3 */
				    /* <&gpioc 2 GPIO_ACTIVE_LOW>,	A4 _ALT0?   ADC1_INP12 */
				    /* <&gpioc 3 GPIO_ACTIVE_LOW>,	A5 _ALT0?   ADC1_INP13 */
				    <&gpioa 4 GPIO_ACTIVE_LOW>,		/* A6	 ADC1_INP18 */
				    <&gpioa 6 GPIO_ACTIVE_LOW>,		/* A7	 ADC1_INP7 */

				    <&gpiok 5 GPIO_ACTIVE_LOW>,		/* LEDR */
				    <&gpiok 6 GPIO_ACTIVE_LOW>,		/* LEDG */
				    <&gpiok 7 GPIO_ACTIVE_LOW>;		/* LEDB */

So only the IO pins on the edge of the H7 (and the leds) are included.

Now suppose, I wish to use an external LCD display, like an ILI9341 and would like to either use my own library and/or the Adafruit library:

So I choose one of the SPI objects within the Device tree. But I still need to use 3 IO pins: CS, DC, Reset
and lets say I am using the Mid Carrier and wish to use some of the unused pins, Maybe in the GPIO1-6

Like GPIO1, 2, 3 - PC15, PG10, PD3 - None of these pins are now in the pin table.
So what do enter for PC15. Note: On MBED I rang it out and knew the number but also could calculate.
PC15 2*16+15+28=75 or I could use the PinNameToIndex(...).

Question is: what do you suggest for Zephyr? Preferably without needing to have lots of libraries need to be updated.

Thanks

Edit: - I forgot to mention that all of the extended pins in my PR, were ones that I was able to ring out, to pins on the breakout board.
I removed all of the pins, that talked to hardware like SDRAM. I used my portenta_hilowtest sketch in my GIGA stuff github...

  					<&gpioa 0 GPIO_ACTIVE_LOW>,
  					/* <&gpioa 1 GPIO_ACTIVE_LOW>, */
  					/* <&gpioa 2 GPIO_ACTIVE_LOW>, */
  					/* <&gpioa 3 GPIO_ACTIVE_LOW>, */
  					/* D21 <&gpioa 4 GPIO_ACTIVE_LOW>, */
  					/* <&gpioa 5 GPIO_ACTIVE_LOW>, */
  					/* D22 <&gpioa 6 GPIO_ACTIVE_LOW>, */
  					/* <&gpioa 7 GPIO_ACTIVE_LOW>, */
  					/* D6 <&gpioa 8 GPIO_ACTIVE_LOW>, */
  					/* D14<&gpioa 9 GPIO_ACTIVE_LOW>, */
  					/* D13 <&gpioa 10 GPIO_ACTIVE_LOW>, */
  					<&gpioa 11 GPIO_ACTIVE_LOW>,
  					<&gpioa 12 GPIO_ACTIVE_LOW>,
  					<&gpioa 13 GPIO_ACTIVE_LOW>,
  					<&gpioa 14 GPIO_ACTIVE_LOW>,
  					/* <&gpioa 15 GPIO_ACTIVE_LOW>, */
  					/* <&gpiob 0 GPIO_ACTIVE_LOW>, */
  					/* <&gpiob 1 GPIO_ACTIVE_LOW>, */
  					<&gpiob 2 GPIO_ACTIVE_LOW>,
  					<&gpiob 3 GPIO_ACTIVE_LOW>,
  					<&gpiob 4 GPIO_ACTIVE_LOW>,
  					/* <&gpiob 5 GPIO_ACTIVE_LOW>, */
  					<&gpiob 6 GPIO_ACTIVE_LOW>,
  					<&gpiob 7 GPIO_ACTIVE_LOW>,
  					<&gpiob 8 GPIO_ACTIVE_LOW>,
  					<&gpiob 9 GPIO_ACTIVE_LOW>,
  					/* <&gpiob 10 GPIO_ACTIVE_LOW>, */
  					/* <&gpiob 11 GPIO_ACTIVE_LOW>, */
  					/* <&gpiob 12 GPIO_ACTIVE_LOW>, */
  					/* <&gpiob 13 GPIO_ACTIVE_LOW>, */
  					<&gpiob 14 GPIO_ACTIVE_LOW>,
  					<&gpiob 15 GPIO_ACTIVE_LOW>,
  					/* <&gpioc 0 GPIO_ACTIVE_LOW>, */
  					/* <&gpioc 1 GPIO_ACTIVE_LOW>, */
  					/* D10 <&gpioc 2 GPIO_ACTIVE_LOW>, */
  					/* D8 <&gpioc 3 GPIO_ACTIVE_LOW>, */
  					/* <&gpioc 4 GPIO_ACTIVE_LOW>, */ 
  					/* <&gpioc 5 GPIO_ACTIVE_LOW>, */
  					/* D5<&gpioc 6 GPIO_ACTIVE_LOW>, */
  					/* D4<&gpioc 7 GPIO_ACTIVE_LOW>, */
  					/* <&gpioc 8 GPIO_ACTIVE_LOW>, */
  					/* <&gpioc 9 GPIO_ACTIVE_LOW>, */
  					/* <&gpioc 10 GPIO_ACTIVE_LOW>, */
  					/* <&gpioc 11 GPIO_ACTIVE_LOW>, */
  					/* <&gpioc 12 GPIO_ACTIVE_LOW>, */
  					<&gpioc 13 GPIO_ACTIVE_LOW>,
  					/* <&gpioc 14 GPIO_ACTIVE_LOW>, */
  					<&gpioc 15 GPIO_ACTIVE_LOW>,
  					/* <&gpiod 0 GPIO_ACTIVE_LOW>, */
  					/* <&gpiod 1 GPIO_ACTIVE_LOW>, */
  					/* <&gpiod 2 GPIO_ACTIVE_LOW>, */
  					<&gpiod 3 GPIO_ACTIVE_LOW>,
  					<&gpiod 4 GPIO_ACTIVE_LOW>,
  					<&gpiod 5 GPIO_ACTIVE_LOW>,
  					<&gpiod 6 GPIO_ACTIVE_LOW>,
  					<&gpiod 7 GPIO_ACTIVE_LOW>,
  					/* <&gpiod 8 GPIO_ACTIVE_LOW>, */
  					/* <&gpiod 9 GPIO_ACTIVE_LOW>, */
  					/* <&gpiod 10 GPIO_ACTIVE_LOW>, */
  					/* <&gpiod 11 GPIO_ACTIVE_LOW>, */
  					/* <&gpiod 12 GPIO_ACTIVE_LOW>, */
  					/* <&gpiod 13 GPIO_ACTIVE_LOW>, */
  					/* <&gpiod 14 GPIO_ACTIVE_LOW>, */
  					/* <&gpiod 15 GPIO_ACTIVE_LOW>, */
  					/* <&gpioe 0 GPIO_ACTIVE_LOW>, */
  					/* <&gpioe 1 GPIO_ACTIVE_LOW>, */
  					<&gpioe 2 GPIO_ACTIVE_LOW>,
  					<&gpioe 3 GPIO_ACTIVE_LOW>,
  					/* <&gpioe 4 GPIO_ACTIVE_LOW>, */
  					/* <&gpioe 5 GPIO_ACTIVE_LOW>, */
  					/* <&gpioe 6 GPIO_ACTIVE_LOW>, */
  					/* <&gpioe 7 GPIO_ACTIVE_LOW>, */
  					/* <&gpioe 8 GPIO_ACTIVE_LOW>, */
  					/* <&gpioe 9 GPIO_ACTIVE_LOW>, */
  					/* <&gpioe 10 GPIO_ACTIVE_LOW>, */
  					/* <&gpioe 11 GPIO_ACTIVE_LOW>, */
  					/* <&gpioe 12 GPIO_ACTIVE_LOW>, */
  					/* <&gpioe 13 GPIO_ACTIVE_LOW>, */
  					/* <&gpioe 14 GPIO_ACTIVE_LOW>, */
  					/* <&gpioe 15 GPIO_ACTIVE_LOW>, */
  					/* <&gpiof 0 GPIO_ACTIVE_LOW>, */
  					/* <&gpiof 1 GPIO_ACTIVE_LOW>, */
  					/* <&gpiof 2 GPIO_ACTIVE_LOW>, */
  					/* <&gpiof 3 GPIO_ACTIVE_LOW>, */
  					/* <&gpiof 4 GPIO_ACTIVE_LOW>, */
  					/* <&gpiof 5 GPIO_ACTIVE_LOW>, */
  					/* <&gpiof 6 GPIO_ACTIVE_LOW>, */
  					/* <&gpiof 7 GPIO_ACTIVE_LOW>, */
  					/* <&gpiof 8 GPIO_ACTIVE_LOW>, */
  					/* <&gpiof 9 GPIO_ACTIVE_LOW>, */
  					/* <&gpiof 10 GPIO_ACTIVE_LOW>, */
  					/* <&gpiof 11 GPIO_ACTIVE_LOW>, */
  					/* <&gpiof 12 GPIO_ACTIVE_LOW>, */
  					/* <&gpiof 13 GPIO_ACTIVE_LOW>, */
  					/* <&gpiof 14 GPIO_ACTIVE_LOW>, */
  					/* <&gpiof 15 GPIO_ACTIVE_LOW>, */
  					/* <&gpiog 0 GPIO_ACTIVE_LOW>, */
  					/* <&gpiog 1 GPIO_ACTIVE_LOW>, */
  					/* <&gpiog 2 GPIO_ACTIVE_LOW>, */
  					<&gpiog 3 GPIO_ACTIVE_LOW>,
  					/* <&gpiog 4 GPIO_ACTIVE_LOW>, */
  					/* <&gpiog 5 GPIO_ACTIVE_LOW>, */
  					/* <&gpiog 6 GPIO_ACTIVE_LOW>, */
  					/* D3 <&gpiog 7 GPIO_ACTIVE_LOW>, */
  					/* <&gpiog 8 GPIO_ACTIVE_LOW>, */
  					<&gpiog 9 GPIO_ACTIVE_LOW>,
  					<&gpiog 10 GPIO_ACTIVE_LOW>,
  					/* <&gpiog 11 GPIO_ACTIVE_LOW>, */
  					/* <&gpiog 12 GPIO_ACTIVE_LOW>, */
  					/* <&gpiog 13 GPIO_ACTIVE_LOW>, */
  					<&gpiog 14 GPIO_ACTIVE_LOW>,
  					/* <&gpiog 15 GPIO_ACTIVE_LOW>, */
  					/* <&gpioh 0 GPIO_ACTIVE_LOW>, */
  					/* <&gpioh 1 GPIO_ACTIVE_LOW>, */
  					/* <&gpioh 2 GPIO_ACTIVE_LOW>, */
  					/* <&gpioh 3 GPIO_ACTIVE_LOW>, */
  					/* <&gpioh 4 GPIO_ACTIVE_LOW>, */
  					/* <&gpioh 5 GPIO_ACTIVE_LOW>, */
  					<&gpioh 6 GPIO_ACTIVE_LOW>,
  					/* D12 <&gpioh 7 GPIO_ACTIVE_LOW>, */
  					/* D11 <&gpioh 8 GPIO_ACTIVE_LOW>, */
  					<&gpioh 9 GPIO_ACTIVE_LOW>,
  					<&gpioh 10 GPIO_ACTIVE_LOW>,
  					<&gpioh 11 GPIO_ACTIVE_LOW>,
  					<&gpioh 12 GPIO_ACTIVE_LOW>,
  					<&gpioh 13 GPIO_ACTIVE_LOW>,
  					<&gpioh 14 GPIO_ACTIVE_LOW>,
  					/* D0 <&gpioh 15 GPIO_ACTIVE_LOW>, */
  					/* D7 <&gpioi 0 GPIO_ACTIVE_LOW>, */
  					/* D9<&gpioi 1 GPIO_ACTIVE_LOW>, */
  					<&gpioi 2 GPIO_ACTIVE_LOW>,
  					<&gpioi 3 GPIO_ACTIVE_LOW>,
  					<&gpioi 4 GPIO_ACTIVE_LOW>,
  					<&gpioi 5 GPIO_ACTIVE_LOW>,
  					<&gpioi 6 GPIO_ACTIVE_LOW>,
  					<&gpioi 7 GPIO_ACTIVE_LOW>,
  					<&gpioi 8 GPIO_ACTIVE_LOW>,
  					<&gpioi 9 GPIO_ACTIVE_LOW>,
  					<&gpioi 10 GPIO_ACTIVE_LOW>,
  					/* <&gpioi 11 GPIO_ACTIVE_LOW>, */
  					/* <&gpioi 12 GPIO_ACTIVE_LOW>, */
  					<&gpioi 13 GPIO_ACTIVE_LOW>,
  					<&gpioi 14 GPIO_ACTIVE_LOW>,
  					<&gpioi 15 GPIO_ACTIVE_LOW>,
  					/* <&gpioj 0 GPIO_ACTIVE_LOW>, */
  					/* <&gpioj 1 GPIO_ACTIVE_LOW>, */
  					/* <&gpioj 2 GPIO_ACTIVE_LOW>, */
  					/* <&gpioj 3 GPIO_ACTIVE_LOW>, */
  					/* <&gpioj 4 GPIO_ACTIVE_LOW>, */
  					/* <&gpioj 5 GPIO_ACTIVE_LOW>, */
  					<&gpioj 6 GPIO_ACTIVE_LOW>,
  					<&gpioj 7 GPIO_ACTIVE_LOW>,
  					<&gpioj 8 GPIO_ACTIVE_LOW>,
  					<&gpioj 9 GPIO_ACTIVE_LOW>,
  					<&gpioj 10 GPIO_ACTIVE_LOW>;
  					/* D2 <&gpioj 11 GPIO_ACTIVE_LOW>, */
  					/* <&gpioj 12 GPIO_ACTIVE_LOW>, */
  					/* <&gpioj 13 GPIO_ACTIVE_LOW>, */
  					/* <&gpioj 14 GPIO_ACTIVE_LOW>, */
  					/* <&gpioj 15 GPIO_ACTIVE_LOW>, */
  					/* <&gpiok 0 GPIO_ACTIVE_LOW>, */
  					/* D1 <&gpiok 1 GPIO_ACTIVE_LOW>; */

  					/* <&gpiok 2 GPIO_ACTIVE_LOW>, */
  					/* <&gpiok 3 GPIO_ACTIVE_LOW>, */
  					/* <&gpiok 4 GPIO_ACTIVE_LOW>; */
  					
					/* commented out for now to allow LEDs to work
					/* LEDR <&gpiok 5 GPIO_ACTIVE_LOW>, */
  					/* LEDG <&gpiok 6 GPIO_ACTIVE_LOW>, */
  					/* LEDB <&gpiok 7 GPIO_ACTIVE_LOW>; */

[mjs513]

Sorry I am late to the discussion been busy with some other things non computer related.

To be honest I would rather see the pin definitions in one place for a variety of reasons. Some of which are think you will be asking for trouble when trying to get all the libraries and documentation updated, not just the ones Arduino maintains. There are a myriad of third party libraries libraries that support the Arduino ecosystem. You want to keep it as easy and simple as can be.

If you remove the commented lines from @KurtE's pin in the previous post its not much longer:

            <&gpioa 0 GPIO_ACTIVE_LOW>,
   					<&gpioa 11 GPIO_ACTIVE_LOW>,
  					<&gpioa 12 GPIO_ACTIVE_LOW>,
  					<&gpioa 13 GPIO_ACTIVE_LOW>,
  					<&gpioa 14 GPIO_ACTIVE_LOW>,
  					<&gpiob 2 GPIO_ACTIVE_LOW>,
  					<&gpiob 3 GPIO_ACTIVE_LOW>,
  					<&gpiob 4 GPIO_ACTIVE_LOW>,
  					<&gpiob 6 GPIO_ACTIVE_LOW>,
  					<&gpiob 7 GPIO_ACTIVE_LOW>,
  					<&gpiob 8 GPIO_ACTIVE_LOW>,
  					<&gpiob 9 GPIO_ACTIVE_LOW>,
  					<&gpiob 14 GPIO_ACTIVE_LOW>,
  					<&gpiob 15 GPIO_ACTIVE_LOW>,
  					<&gpioc 13 GPIO_ACTIVE_LOW>,
  					<&gpioc 15 GPIO_ACTIVE_LOW>,
  					<&gpiod 3 GPIO_ACTIVE_LOW>,
  					<&gpiod 4 GPIO_ACTIVE_LOW>,
  					<&gpiod 5 GPIO_ACTIVE_LOW>,
  					<&gpiod 6 GPIO_ACTIVE_LOW>,
  					<&gpiod 7 GPIO_ACTIVE_LOW>,
  					<&gpioe 2 GPIO_ACTIVE_LOW>,
  					<&gpioe 3 GPIO_ACTIVE_LOW>,
   					<&gpiog 3 GPIO_ACTIVE_LOW>,
  					<&gpiog 9 GPIO_ACTIVE_LOW>,
  					<&gpiog 10 GPIO_ACTIVE_LOW>,
   					<&gpiog 14 GPIO_ACTIVE_LOW>,
  					<&gpioh 6 GPIO_ACTIVE_LOW>,
   					<&gpioh 9 GPIO_ACTIVE_LOW>,
  					<&gpioh 10 GPIO_ACTIVE_LOW>,
  					<&gpioh 11 GPIO_ACTIVE_LOW>,
  					<&gpioh 12 GPIO_ACTIVE_LOW>,
  					<&gpioh 13 GPIO_ACTIVE_LOW>,
  					<&gpioh 14 GPIO_ACTIVE_LOW>,
   					<&gpioi 2 GPIO_ACTIVE_LOW>,
  					<&gpioi 3 GPIO_ACTIVE_LOW>,
  					<&gpioi 4 GPIO_ACTIVE_LOW>,
  					<&gpioi 5 GPIO_ACTIVE_LOW>,
  					<&gpioi 6 GPIO_ACTIVE_LOW>,
  					<&gpioi 7 GPIO_ACTIVE_LOW>,
  					<&gpioi 8 GPIO_ACTIVE_LOW>,
  					<&gpioi 9 GPIO_ACTIVE_LOW>,
  					<&gpioi 10 GPIO_ACTIVE_LOW>,
  					<&gpioi 13 GPIO_ACTIVE_LOW>,
  					<&gpioi 14 GPIO_ACTIVE_LOW>,
  					<&gpioi 15 GPIO_ACTIVE_LOW>,
  					<&gpioj 6 GPIO_ACTIVE_LOW>,
  					<&gpioj 7 GPIO_ACTIVE_LOW>,
  					<&gpioj 8 GPIO_ACTIVE_LOW>,
  					<&gpioj 9 GPIO_ACTIVE_LOW>,
  					<&gpioj 10 GPIO_ACTIVE_LOW>;

and if I remember right we commented out the led pins because where was a conflict so they would not work unless you fixed that.

[KurtE]

@mjs513 @pillo79 @facchinm and all:

I have been playing around some with this over the weekend. I have create a new branch:
https://github.com/KurtE/ArduinoCore-zephyr/tree/portenta_pin_names
which is based off of the current Arduino branch.

This branch has three changed files:
variant.h which includes the PinNames.h
PinNames.h, which instead of creating its own type and then created overloaded functions for things like: pinMode,
it simply an enum with the names, which maps directly to the pin number.

And the overlay file changes, where the only changes to the device tree, were to add all of the additional pins, that I was able
to use digitalRead/digitalWrite to, on the different carrier boards.

Note: I also added in two bogus entries in place of the two currently commented out pins in the current pin table:
Updated Version:

	zephyr,user {
		digital-pin-gpios = <&gpioh 15 GPIO_ACTIVE_LOW>,	/* D0 */
				    <&gpiok 1 GPIO_ACTIVE_LOW>,		/* D1 */
				    <&gpioj 11 GPIO_ACTIVE_LOW>,	/* D2 */
				    <&gpiog 7 GPIO_ACTIVE_LOW>,		/* D3 */
				    <&gpioc 7 GPIO_ACTIVE_LOW>,		/* D4 */
				    <&gpioc 6 GPIO_ACTIVE_LOW>,		/* D5 */
				    <&gpioa 8 GPIO_ACTIVE_LOW>,		/* D6 */
				    <&gpioi 0 GPIO_ACTIVE_LOW>,		/* D7 */
				    <&gpioc 3 GPIO_ACTIVE_LOW>,		/* D8 */
				    <&gpioi 1 GPIO_ACTIVE_LOW>,		/* D9 */
				    <&gpioc 2 GPIO_ACTIVE_LOW>,		/* D10 */
				    <&gpioh 8 GPIO_ACTIVE_LOW>,		/* D11 */
				    <&gpioh 7 GPIO_ACTIVE_LOW>,		/* D12 */
				    <&gpioa 10 GPIO_ACTIVE_LOW>,	/* D13 */
				    <&gpioa 9 GPIO_ACTIVE_LOW>,		/* D14 */

				    <&gpioz 0 GPIO_ACTIVE_LOW>,		/* A0	 ADC2_INP0 */
				    <&gpioz 1 GPIO_ACTIVE_LOW>,		/* A1	 ADC2_INP1 */
				    <&gpioz 2 GPIO_ACTIVE_LOW>,		/* A2	 ADC3_INP0 */
				    <&gpioz 3 GPIO_ACTIVE_LOW>,		/* A3	 ADC3_INP1 */
				    <&gpioz 4 GPIO_ACTIVE_LOW>,		/* A4 hack for duplicate PC_2 */
				    <&gpioz 5 GPIO_ACTIVE_LOW>,		/* A5 hack for duplicate PC_3 */
				    <&gpioz 12 GPIO_ACTIVE_LOW>,		/* PC2	A4 _ALT0?   ADC1_INP12 */
				    <&gpioz 13 GPIO_ACTIVE_LOW>,		/* PC3 A5 _ALT0?   ADC1_INP13 */
				    <&gpioa 4 GPIO_ACTIVE_LOW>,		/* A6	 ADC1_INP18 */
				    <&gpioa 6 GPIO_ACTIVE_LOW>,		/* A7	 ADC1_INP7 */


					<&gpiok 5 GPIO_ACTIVE_LOW>,		// LEDR
					<&gpiok 6 GPIO_ACTIVE_LOW>,		// LEDG
					<&gpiok 7 GPIO_ACTIVE_LOW>,		// LEDB

  					<&gpioa 0 GPIO_ACTIVE_LOW>,
  					<&gpioa 11 GPIO_ACTIVE_LOW>,
  					<&gpioa 12 GPIO_ACTIVE_LOW>,
  					<&gpioa 13 GPIO_ACTIVE_LOW>,
  					<&gpioa 14 GPIO_ACTIVE_LOW>,
  					<&gpiob 2 GPIO_ACTIVE_LOW>,
  					<&gpiob 3 GPIO_ACTIVE_LOW>,
  					<&gpiob 4 GPIO_ACTIVE_LOW>,
  					<&gpiob 6 GPIO_ACTIVE_LOW>,
  					<&gpiob 7 GPIO_ACTIVE_LOW>,
  					<&gpiob 8 GPIO_ACTIVE_LOW>,
  					<&gpiob 9 GPIO_ACTIVE_LOW>,
  					<&gpiob 14 GPIO_ACTIVE_LOW>,
  					<&gpiob 15 GPIO_ACTIVE_LOW>,
  					<&gpioc 13 GPIO_ACTIVE_LOW>,
  					<&gpioc 15 GPIO_ACTIVE_LOW>,
  					<&gpiod 3 GPIO_ACTIVE_LOW>,
  					<&gpiod 4 GPIO_ACTIVE_LOW>,
  					<&gpiod 5 GPIO_ACTIVE_LOW>,
  					<&gpiod 6 GPIO_ACTIVE_LOW>,
  					<&gpiod 7 GPIO_ACTIVE_LOW>,
  					<&gpioe 2 GPIO_ACTIVE_LOW>,
  					<&gpioe 3 GPIO_ACTIVE_LOW>,
  					<&gpiog 3 GPIO_ACTIVE_LOW>,
  					<&gpiog 9 GPIO_ACTIVE_LOW>,
  					<&gpiog 10 GPIO_ACTIVE_LOW>,
  					<&gpiog 14 GPIO_ACTIVE_LOW>,
  					<&gpioh 6 GPIO_ACTIVE_LOW>,
  					<&gpioh 9 GPIO_ACTIVE_LOW>,
  					<&gpioh 10 GPIO_ACTIVE_LOW>,
  					<&gpioh 11 GPIO_ACTIVE_LOW>,
  					<&gpioh 12 GPIO_ACTIVE_LOW>,
  					<&gpioh 13 GPIO_ACTIVE_LOW>,
  					<&gpioh 14 GPIO_ACTIVE_LOW>,
  					<&gpioi 2 GPIO_ACTIVE_LOW>,
  					<&gpioi 3 GPIO_ACTIVE_LOW>,
  					<&gpioi 4 GPIO_ACTIVE_LOW>,
  					<&gpioi 5 GPIO_ACTIVE_LOW>,
  					<&gpioi 6 GPIO_ACTIVE_LOW>,
  					<&gpioi 7 GPIO_ACTIVE_LOW>,
  					<&gpioi 8 GPIO_ACTIVE_LOW>,
  					<&gpioi 9 GPIO_ACTIVE_LOW>,
  					<&gpioi 10 GPIO_ACTIVE_LOW>,
  					<&gpioi 13 GPIO_ACTIVE_LOW>,
  					<&gpioi 14 GPIO_ACTIVE_LOW>,
  					<&gpioi 15 GPIO_ACTIVE_LOW>,
  					<&gpioj 6 GPIO_ACTIVE_LOW>,
  					<&gpioj 7 GPIO_ACTIVE_LOW>,
  					<&gpioj 8 GPIO_ACTIVE_LOW>,
  					<&gpioj 9 GPIO_ACTIVE_LOW>,
  					<&gpioj 10 GPIO_ACTIVE_LOW>;

The reason for the two replacement hacked items:

				    <&gpioz 12 GPIO_ACTIVE_LOW>,		/* PC2	A4 _ALT0?   ADC1_INP12 */
				    <&gpioz 13 GPIO_ACTIVE_LOW>,		/* PC3 A5 _ALT0?   ADC1_INP13 */

Simply used your z hack... why:
If you look at the pin out for these pins:

These pins have duplicate in pins D8 and D10, and If you simply put C2/C3 in the GPIO pin table the enumeration code
that generates the Arduino Pin sums the index of all that match: so instead of D8 being 8, it becomes If I remember correctly
8+20 ...

[pillo79]

Hello guys, and thanks for being so supportive! 🥇

On this topic the idea I had was to fully exploit the same Zephyr GPIO nexus nodes abstraction used in the arduino-r3-connector: I would basically define each board connector in the schematics with its GPIO pins, and then reference the same pins in the digital-pin-gpios table via those connector names and numbers. Should be much more descriptive, single-source (you copy connector numbers, not GPIO info), and also flexible (you can directly reference a board connector pin, or in the future support multiple different standards like UNO, Mega etc).

IIRC the core is currently missing some macro magic to allow the number lookups to work properly but it should be definitely possible.

What do you think about this?

[KurtE]

Hi @pillo79 -

Sorry I only know enough to be dangerous. 😆

but by GPIO nexus nodes - This is the arduino_header part used in the GIGA pin definitions?

	zephyr,user {
		digital-pin-gpios = <&arduino_header 6 0>,
						<&arduino_header 7 0>,
						<&arduino_header 8 0>,
						<&arduino_header 9 0>,
						<&arduino_header 10 0>,
						<&arduino_header 11 0>,
						<&arduino_header 12 0>,
						<&arduino_header 13 0>,
						<&arduino_header 14 0>,
						<&arduino_header 15 0>,
						<&arduino_header 16 0>,
						<&arduino_header 17 0>,
						<&arduino_header 18 0>,
						<&arduino_header 19 0>,
						<&gpiog 14 0>,				/* TX1 - 14 */
						<&gpioc 7 0>,
...

Maybe it is helpful. Especially if you do a lot of similar boards. For me, at least at first it was confusing as
you had to know that pins 0-5 were the Analog 0-5 pins, so D0 is actually header pin 6...

It would probably help to see more examples. And how this translates back to the Arduino side.

For example if you could define, logical connectors that show all of the available pins for each of the different carrier boards,
like: on the hat carrier board, on the RPI connector pin 7 maps to the H7 pin PA_8
and the PH connector pin 9 goes to PJ_7
.
Or on the Mid Breakout - by names? like GPIO1 -> ...

For the Arduino/C++ world, I might suggest in one of the header files, one could do this, by
adding Name spaces with defines or named Enums where maybe one could do: PMIDC::GPIO1 as a pin number passed to pinMode(...
But I don't know how that translates back into the zephyr world.

Sorry hopefully others with more experience here with zephyr might give a more coherent response.

[mjs513]

Sorry for being late to the party but am confused as how that would help if working with the breakout boards for the h7 as @KurtE mentioned. Does make sense when you work with a board like the GIGA or the uno or the due or the mega that has the pin numberin on the headers for the most post. In the case of the mid-carrier there are no pin-numberings only pin names.

So as @KurtE mentioned what is the reference equivalent - how would I know what the pin-number for GPIO-6 would be or for sda/scl etc. I would be guess or assuming. For these breakout boards I think you would need to enumerate them somehow as Kurt mentioned.

Now - I can see if you just want to use them for CPU board since the pins are numbered but not labeled.

Think if you try to use aliases it would make the overlays even more confusing.