Implement control of esp32 DAC built-in cosine waveform generator

[terren272]

Describe the problem you have/What new integration you would like

The esp32 DAC has a built-in cosine waveform generator, not yet accessible or supported in esphome DAC configuration. This seems simple enough to implement, please. Can this be done via lambda and direct register access? I don't want to create the wave from calculations or lookup tables, for slow waveform output, taking up all chip resources when this is already built in to the chip to work on its own. Please implement control of the DAC's built in cosine generator here: (calling it with at least the parameters of Frequency, On, OFF or start/stop)

output:

• platform: esp32_dac pin: GPIO25 id: dac_output

reference https://github.com/krzychb/dac-cosine

Please describe your use case for this integration and alternatives you've tried:

I'm hoping to use this for on-the-fly signal generation, where I can change at least the frequency to control frequency controlled devices, or for clock generation, all without using program / chip cycle time. Also for inter-device state communication via specific frequency. Audible tone generation for audible state / status would be useful to the blind or for everyone not looking at a screen or LED for status. R2D2 communicates via audible tones. Hey if it's a feature of esp32, I'd like to control it via esphome.

Additional context

[nagyrobi]

inter-device state communication via specific frequency

How do you want to implement that?

[terren272]

That use case isn't relevant. I just need to control and set the frequency of the esp32 DAC built-in cosine waveform generator from esphome. Frequency generation would be very useful to many, I would think, for many use cases.

[nagyrobi]

That use case isn't relevant.

It is, for many people, and since you mentioned it, why not share the idea?

[terren272]

The IDEA here is to convince ESPhome to provide configuration access and control of esp32 DAC built-in cosine waveform generator.

All use cases are irrelevant if they cannot be implemented, because as far as I know, we don't currently have control of this built-in chip feature.

[terren272]

PLEASE implement support for esp32 Cosine Wave Generator

"The ESP32 DAC has a single Cosine Wave Generator, whose output can be sent to one or both DAC channels. The user has control over the frequency, amplitude, and phase of the cosine wave."