Trait embedded_display_controller::DisplayControllerLayer

pub trait DisplayControllerLayer {
    // Required methods
    unsafe fn enable<T: PixelWord>(
        &mut self,
        start_ptr: *const T,
        pixel_format: PixelFormat
    );
    unsafe fn swap_framebuffer<T: PixelWord>(&mut self, start_ptr: *const T);
    fn is_swap_pending(&self) -> bool;
    unsafe fn resize_buffer_pitch(&mut self, width: u32);
}

A layer of a microcontroller peripheral that drives a LCD-TFT display.

May be implemented alongside DisplayController if the LCD-TFT display peripheral only supports one layer.

Required Methods

unsafe fn enable<T: PixelWord>( &mut self, start_ptr: *const T, pixel_format: PixelFormat )

Enable this display layer.

Safety

[To be completed by implementation]

unsafe fn swap_framebuffer<T: PixelWord>(&mut self, start_ptr: *const T)

Swap the framebuffer to a new one.

Safety

start_ptr must point to a location that can be accessed by the LTDC peripheral, with sufficient length for the framebuffer.

fn is_swap_pending(&self) -> bool

Indicates that a framebuffer swap is pending. In this situation, memory we previously supplied to swap_framebuffer, before the most recent call, is still owned by the display.

unsafe fn resize_buffer_pitch(&mut self, width: u32)

Resizes the framebuffer pitch. This does not change the output window size. The shadow registers are reloaded immediately.

The framebuffer pitch is the increment from the start of one line of pixels to the start of the next line.

Safety

The caller must ensure that enough memory is allocated for the resulting framebuffer size

Object Safety

This trait is not object safe.

Implementors