I was able to get the I2S working more like SPI, without having to skip every other word.

thanks for the ideas. I got it working (sort of) using I2S. I used the WS signal as my CS.
The only downside is WS goes low for left channel, and then high for the right. When I am done sampling I just chuck out every other word from the sample buffer.

Using an ESP32-S3 I need to sample a voltage at 40khz. I am using an ADS7822 A/D converter via SPI.
https://www.ti.com/product/ADS7822

I am seeking advise on how I could read this data into a DMA buffer behind the scenes without starving my 2 cores for CPU time.


Any ideas welcome.