How to access peripherals.DMA_CH0

[inadati]

I am currently developing a musical instrument using ESP32S3 and esp-hal.
I want to use I2S for DAC-related processing.
I am trying to use I2s::new by referring to the esp-hal repository.
However, when I try to pass peripherals.DMA_CH0 as an argument to I2s::new, I get an error.

Diagnostics:
1. no field `DMA_CH0` on type `Peripherals`
   available fields are: `ADC1`, `ADC2`, `AES`, `APB_CTRL`, `ASSIST_DEBUG` ... and 95 others [E0609]

Are there any additional traits or features that I need to enable? If there is a way to enable peripherals.DMA_CH0, could you please help me?

Thank you in advance for your help.

[bjoernQ]

You might be missing the unstable feature. Background is we are stabilizing parts of the API but not everything at once - DMA and I2S will need a few more iterations before they can get stabilized

[inadati]

@bugadani
Thank you!
I will check it.

[inadati]

@bugadani
Do you know what changes have been made to SystemTimer::now in unstable?
I can see SystemTimer information in MIGRATING-0.22.md, but I can't see any mention of SystemTimer::now.
Is it more appropriate to start this question separately?

[bugadani]

are you looking for esp_hal::time::now()?

[inadati]

@bugadani
Thank you so much.
But esp_hal::time::now() returns Instant struct.
SystemTimer::now() returns u64.
More precisely, is esp_hal::time::now().ticks() compatible with SystemTimer::now()?

[inadati]

Thank you.
I have successfully qa-test/src/bin/embassy_i2s_sound.rs I was able to successfully run.