Struct AudioPeripherals 

pub struct AudioPeripherals<'a> {
    pub codec_pins: Pins<'a>,
    pub sai1: Peri<'a, SAI1>,
    pub i2c2: Peri<'a, I2C2>,
    pub dma1_ch0: Peri<'a, DMA1_CH0>,
    pub dma1_ch1: Peri<'a, DMA1_CH1>,
    pub dma1_ch2: Peri<'a, DMA1_CH2>,
}

AudioPeripherals is a builder to make Interface safely. It ensures the correct pin mappings and DMA regions for SAI on every supported Seed revision, preventing invalid peripheral configurations at compile time. Use prepare_interface() to apply board‐rev-specific SAI setup and transition into the Interface<'_, Idle>. From there you can call start_interface() to move to Interface<'_, Running> and begin audio callbacks.

Fields

codec_pins: Pins<'a>

sai1: Peri<'a, SAI1>

i2c2: Peri<'a, I2C2>

dma1_ch0: Peri<'a, DMA1_CH0>

dma1_ch1: Peri<'a, DMA1_CH1>

dma1_ch2: Peri<'a, DMA1_CH2>

Implementations

impl<'a> AudioPeripherals<'a>

pub async fn prepare_interface( self, audio_config: AudioConfig, ) -> Interface<'a, Idle>

Prepares the audio interface.

This method sets up the SAI transmitter and receiver, configures the codec (if necessary), allocates DMA buffers, and applies board-specific SAI settings. It returns an Interface<'a, Idle> in the Idle state, allowing the runtime to decide when to start audio callbacks using start_interface().

Arguments

• audio_config - Audio configuration parameters such as the sample rate.
  You can use AudioConfig::default() or Default::default() for default settings.

Notes

• This method is async because seed_1_1 requires I2C communication with the WM8731 codec.
• The board revision is selected via Cargo features (seed_1_1, seed_1_2).