Struct Pdm 

pub struct Pdm<'d> { /* private fields */ }

PDM microphone interface

Implementations

impl<'d> Pdm<'d>

pub fn new<T: Instance>( pdm: Peri<'d, T>, clk: Peri<'d, impl GpioPin>, din: Peri<'d, impl GpioPin>, _irq: impl Binding<T::Interrupt, InterruptHandler<T>> + 'd, config: Config, ) -> Self

Create PDM driver

pub fn set_gain(&mut self, gain_left: i8, gain_right: i8)

Adjust the gain of the PDM microphone on the fly.

Gains are in units of 0.5 dB, from -40 (-20 dB) to 40 (+20 dB). Values outside that range are clamped.

pub async fn start(&mut self)

Start sampling microphone data into a dummy buffer. Useful to start the microphone and keep it active between recording samples.

pub async fn stop(&mut self)

Stop sampling microphone data inta a dummy buffer

pub async fn sample(&mut self, buffer: &mut [i16]) -> Result<(), Error>

Sample data into the given buffer

pub async fn run_task_sampler<S, const N: usize>( &mut self, bufs: &mut [[i16; N]; 2], sampler: S, ) -> Result<(), Error>

where S: FnMut(&[i16; N]) -> SamplerState,

Continuous sampling with double buffers.

A sampler closure is provided that receives the buffer of samples, noting that the size of this buffer can be less than the original buffer’s size. A command is return from the closure that indicates whether the sampling should continue or stop.

NOTE: The time spent within the callback supplied should not exceed the time taken to acquire the samples into a single buffer. You should measure the time taken by the callback and set the sample buffer size accordingly. Exceeding this time can lead to samples becoming dropped.

Trait Implementations

impl<'d> Drop for Pdm<'d>

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.