Struct Pdm

pub struct Pdm<'d, T: Instance> { /* private fields */ }

PDM microphone interface

Implementations

impl<'d, T: Instance> Pdm<'d, T>

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

Create PDM driver

pub fn set_gain(&mut self, gain_left: I7F1, gain_right: I7F1)

Adjust the gain of the PDM microphone on the fly

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, T: Instance> Drop for Pdm<'d, T>

fn drop(&mut self)

Executes the destructor for this type.