Many people think about this but no solid implementation so far.. have you consider I2S audio codec? Tomek
On Sun, Feb 23, 2025 at 12:07 AM Kevin Witteveen <kevinwit1...@gmail.com> wrote: > > Thanks, however I'm specifically looking for audio. For example, music, > samples, etc. A tone is not enough for what I'm looking for. > Or did I miss something and the audio_tone is actually more than just a > tone? > > Op za 22 feb 2025 om 22:05 schreef TimH <t...@jti.uk.com.invalid>: > > > 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 > > > > -- CeDeROM, SQ7MHZ, http://www.tomek.cedro.info
