Trait DevicePio 

pub trait DevicePio {
    // Required methods
    fn pio_read(
        &self,
        base: PioAddress,
        offset: PioAddressOffset,
        data: &mut [u8],
    );
    fn pio_write(&self, base: PioAddress, offset: PioAddressOffset, data: &[u8]);
}

Allows a device to be attached to a PIO bus.

Example

struct DummyDevice {
    config: Mutex<u32>,
}

impl DevicePio for DummyDevice {
    fn pio_read(&self, _base: PioAddress, _offset: PioAddressOffset, data: &mut [u8]) {
        if data.len() > 4 {
            return;
        }
        for (idx, iter) in data.iter_mut().enumerate() {
            let config = self.config.lock().expect("failed to acquire lock");
            *iter = (*config >> (idx * 8) & 0xff) as u8;
        }
    }

    fn pio_write(&self, _base: PioAddress, _offset: PioAddressOffset, data: &[u8]) {
        let mut config = self.config.lock().expect("failed to acquire lock");
        *config = u32::from(data[0]) & 0xff;
    }
}

Required Methods

fn pio_read(&self, base: PioAddress, offset: PioAddressOffset, data: &mut [u8])

Handle a read operation on the device.

Arguments

• base: base address on a PIO bus
• offset: base address’ offset
• data: a buffer provided by the caller to store the read data

fn pio_write(&self, base: PioAddress, offset: PioAddressOffset, data: &[u8])

Handle a write operation to the device.

Arguments

• base: base address on a PIO bus
• offset: base address’ offset
• data: a buffer provided by the caller holding the data to write

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl<T: DevicePio + ?Sized> DevicePio for Arc<T>

fn pio_read(&self, base: PioAddress, offset: PioAddressOffset, data: &mut [u8])

fn pio_write(&self, base: PioAddress, offset: PioAddressOffset, data: &[u8])

impl<T: MutDevicePio + ?Sized> DevicePio for Mutex<T>

fn pio_read(&self, base: PioAddress, offset: PioAddressOffset, data: &mut [u8])

fn pio_write(&self, base: PioAddress, offset: PioAddressOffset, data: &[u8])

Implementors