CONFIG_AUDIO_TONE? Not sure if that’s exactly what you’re after but could be?
> On 22 Feb 2025, at 17:12, Kevin Witteveen <kevinwit1...@gmail.com> wrote: > > Hi nuttx, > > I need an audio device that can generate sound using PWM on the RP2040. It > appears nothing already exists for this. > What would be a good way to implement this? > > My previous implementation outside NuttX was to use DMA to feed samples > into a PWM register. Relatively simple. > However, in NuttX i now need to combine the PWM implementation with the > DMAC implementation. This is where I'm not sure how to "connect them > together" on a proper "nuttx" way. > Then also have it show up as an audio device. > > in case you wonder about the concept PWM audio. It is a common way to > generate audio. It is how class-D amplifiers work. This is because the duty > cycle of PWM when filtered becomes an analog signal. A very cheap way to > implement audio in systems. > > Are there any examples of projects out there that did this with Nuttx? > Or are there any people that have an idea how to take this project on? > Where do i begin? Where would i implement this? Board? Architecture? > > I would appreciate any help
