MicroPython Forum (Archive)

Some potentially good news about using I2S with the MIMXRT1060 evaluation board -- I downloaded the schematic for the MIMXRT1060-EVKB and found a connector (J23) that brings out the I2S audio signals from the processor. This suggests that low cost and simple I2S DACs and I2S microphones can be used ...

Hi Robert, Thank you for the fast response. So which output driver/hardware did you use for testing? Here is the hardware I have been using: DAC: PCM5102 DAC (aliexpress, ebay, etc), and https://www.adafruit.com/product/3678, and https://www.adafruit.com/product/3006 Microphone: INMP441 MEMS (aliexp...

I2S Protocol Update @Roberthh @alphaFred I2S support on the mimxrt port is about 99% complete. I considered submitting a PR but there are a couple of outstanding issues that are best discussed informally in the forum. The mimxrt I2S implementation is in a github branch, here . The branch is rebased...

Hey, that's great news.

For testing, it would be good to try I2S with both a DAC (Tx mode) and a microphone (Rx mode), but seeing it work on one of these should be adequate.

I have a repo with some resources to help understand the mysteries of I2S: https://github.com/miketeachman/micropython-i2s-examples The repo includes a FAQ describing some rules of thumb for buffer sizing and a description of I2S operation that uses a water analogy. Hopefully that will help. If not,...

Discussed here:
viewtopic.php?t=3368

It's a good time for an update. Here is the progress so far: 1. A skeleton of the I2S class is working in the machine module. I2S objects can be created. 2. Using NXP example code I've been able to initialize the I2S peripheral, initiate a data transfer to the I2S peripheral using DMA, and get a DMA...

The docs for the ESP32 are quite good for the UART class:
https://docs.micropython.org/en/latest/ ... serial-bus

By trial and error I've found that slot=2, or slot=3 needs to be specified. That directs the SD card interface to use the SPI protocol rather than the SD/MMC mode. I use the Lolin Pro 32 as my main ESP32 dev board. All of the following combinations will work for this board (maybe others too !) sd = ...

The SDCard class doc has ESP32 specific details including the SPI pins for each slot.
https://docs.micropython.org/en/latest/ ... html#esp32