[][src]Trait kernel::hil::adc::AdcHighSpeed

pub trait AdcHighSpeed: Adc {
    fn sample_highspeed(
        &self,
        channel: &Self::Channel,
        frequency: u32,
        buffer1: &'static mut [u16],
        length1: usize,
        buffer2: &'static mut [u16],
        length2: usize
    ) -> (ReturnCode, Option<&'static mut [u16]>, Option<&'static mut [u16]>);
fn provide_buffer(
        &self,
        buf: &'static mut [u16],
        length: usize
    ) -> (ReturnCode, Option<&'static mut [u16]>);
fn retrieve_buffers(
        &self
    ) -> (ReturnCode, Option<&'static mut [u16]>, Option<&'static mut [u16]>); }

Interface for continuously sampling at a given frequency on a channel. Requires the AdcSimple interface to have been implemented as well.

Required methods

fn sample_highspeed(
    &self,
    channel: &Self::Channel,
    frequency: u32,
    buffer1: &'static mut [u16],
    length1: usize,
    buffer2: &'static mut [u16],
    length2: usize
) -> (ReturnCode, Option<&'static mut [u16]>, Option<&'static mut [u16]>)

Start sampling continuously into buffers. Samples are double-buffered, going first into buffer1 and then into buffer2. A callback is performed to the client whenever either buffer is full, which expects either a second buffer to be sent via the provide_buffer call. Length fields correspond to the number of samples that should be collected in each buffer. If an error occurs, the buffers will be returned.

All ADC samples will be the raw ADC value left-justified in the u16.

fn provide_buffer(
    &self,
    buf: &'static mut [u16],
    length: usize
) -> (ReturnCode, Option<&'static mut [u16]>)

Provide a new buffer to fill with the ongoing sample_continuous configuration. Expected to be called in a buffer_ready callback. Note that if this is not called before the second buffer is filled, samples will be missed. Length field corresponds to the number of samples that should be collected in the buffer. If an error occurs, the buffer will be returned.

All ADC samples will be the raw ADC value left-justified in the u16.

fn retrieve_buffers(
    &self
) -> (ReturnCode, Option<&'static mut [u16]>, Option<&'static mut [u16]>)

Reclaim ownership of buffers. Can only be called when the ADC is inactive, which occurs after a successful stop_sampling. Used to reclaim buffers after a sampling operation is complete. Returns success if the ADC was inactive, but there may still be no buffers that are some if the driver had already returned all buffers.

All ADC samples will be the raw ADC value left-justified in the u16.

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Implementors

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