Richer ADC class

[kc64]

Are there any plans for, or work in progress on, a more feature-rich ADC class implementation. Presently, there is only one method and it only works for direct interaction with the device. Other features would be very useful, I think, such as:

• streaming data with DMA
• round robin support
• clock divider

At present, the only way I've found to interface these is using a ctypes implementation or using wrappers around mem32 calls.

[GitHubsSilverBullet]

Putting everything the ADC can do into a class would fill the entire Flash-memory.
We have the simple mem[8/16/32], the better and faster Viper code and we have thumb assembler at our hands. That in combination with clock manipulation, DMA and interrupts, what more could one possibly want?

[kc64]

Oh, sorry. I didn't realize uPy was up against a wall on Flash memory on the Pico. I think this is the answer.
I'm already doing the rest in my current implementation.

[robert-hh]

There is an ADC timed method in the PyBoard port, and I made a PR with ADC-timed/DAC-timed group of methods for the SAMD port. Both implementations cover a few of the things you mentioned. The PR for SAMD stalls. Damien wants to define a suitable API for this class which then can be implemented for all ports. b.t.w.: The additional code size for the SAMD port is about 2K. That should be pretty acceptable for the Pico port, which is not short of flash.
You can do a lot with Python code using e.g. Viper for direct hardware manipulation and the Pico DMA class. That will help for now. But I agree that it would be better to have a clean extension of the ADC/DAC classes.