Read Output pin level about rppal HOT 7 CLOSED

I actually had some read methods as part of OutputPin during development, but decided against keeping them in, because the user should already be aware of the level they set the pin at, and they can keep track of it just like you're doing now. You can still read the initial state of the pin by using the read method on the Pin instance you get back from Gpio::get, before converting it to an OutputPin.

If I were to re-add those read methods, checking the relevant registers would add additional overhead, so saving state would still be a faster way of keeping track. I don't mind adding them back in with the next release if there's enough demand for it though.

Are you trying to accomplish anything in particular where you need to know the state of the OutputPin, or do you just want to be able to return it as a convenience to the users of your library?

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Actually, now that I think about it, reading the pin's level before configuring it would only make sense if it was already previously configured for output, so that might not be that useful to you.

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When I removed the methods, I assumed there would be no use case for them, but it sounds nice to have in your situation, so I'll add them to the list for the 0.11.0 release!

You'll have to save state internally for now, or alternatively, you might be able to work with IoPin instead, which does allow you to call read, is_low and is_high on a pin set for output.

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Thanks for the compliment! It's great to hear my code has been useful to other people as well.

Speaking of which, I'll likely push my initial implementation of software-based PWM to the master branch later this week, so you'll have something new to go through. I still have a few more things to try first before I'm ready to settle for 'good enough' 😄.

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Wow... that's awesome... I have already started porting gpio access using rppal. I am having much code repetition trying to mimic OOP design in original python library.. going to try some macros to be DRYer

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