Pin configuration change in loop

[holotrack]

I need to switch pin configuration "on the fly" how to do that with this library? Standard in rust is what i read is something like that:

loop {
    let mut eled = pin!(pins, dig9).into_output();

    eled.set_low().unwrap();
    sleep.delay_ms(20);
    eled.set_high().unwrap();
    sleep.delay_ms(35);
    sprintln!("sent");

    let mut eled_input = eled.into_floating_input()

    while eled_input.is_high().unwrap() {};
    while eled_input.is_low().unwrap() {};
    while eled_input.is_high().unwrap() {};

}

But when i try it with this library im getting on eled.into_input(); "no such method". How it should be handled here?

[Rahix]

The methods are into_floating_input() and into_pull_up_input(), check the docs: https://rahix.github.io/avr-hal/avr_hal_generic/port/struct.Pin.html

But we're working on a more ergonomic way to do this, take a look at MR #205. If this fits your usecase and you can provide some feedback on the API, I can merge those changes so they become generally available.

[holotrack]

Sorry but not sure which should i use. Should i use solution from link or i should try to do something like this:

#[arduino_hal::entry]
fn main() -> ! {
    
    let dp = arduino_hal::Peripherals::take().unwrap();
    let pins = arduino_hal::pins!(dp);
    let mut led = pins.d12.into_opendrain_high();

    loop {
        

        led.set_low();
        arduino_hal::delay_ms(20);
        led.set_high();
        arduino_hal::delay_ms(35);

        let mut ledin = led.into_pull_up_input();

        while ledin.is_high() {};

        let mut led = ledin.into_opendrain_high();

    }
}

what i see under this link this convention should work for rust or am i missing something?

[Rahix]

Both work. I would recommend using the PR #205 code I linked as this API is more flexible and can work in more situations.

But the code which you shared is not technically wrong either, it is just more restricted in what you can do with it.

[holotrack]

First i want to test first solution but when im trying to compile it im getting:

error[E0382]: borrow of moved value: `led`
  --> src/main.rs:16:9
   |
11 |     let mut led = pins.d12.into_opendrain_high();
   |         ------- move occurs because `led` has type `avr_hal_generic::port::Pin<OpenDrain, PB4>`, which does not implement the `Copy` trait
...
16 |         led.set_low();
   |         ^^^ value borrowed here after move
...
21 |         let mut ledin = led.into_pull_up_input();
   |                         --- value moved here, in previous iteration of loop

error: aborting due to previous error; 3 warnings emitted

Some problem with borrow checker, but im creating everytime in loop new value so why it doesnt want to switch?

[Rahix]

Your last line is wrong I think. It needs to be just

led = ledin.into_opendrain_high();

(without let mut)

[holotrack]

greate now its compiling, thank you. closing ticket, when i will have problem with second solution will update its ticket