Trait DisplayControl

pub trait DisplayControl {
    // Required methods
    fn initialise_for_display(&mut self);
    fn display_row_leds(&mut self, row: usize, cols: u32);
    fn light_current_row_leds(&mut self, cols: u32);
}

The interface that Display needs to work with an LED matrix.

Assumes the matrix is organised by rows and columns, in such a way that LEDs from at most one row are lit at any time.

Required Methods

fn initialise_for_display(&mut self)

Performs any required hardware initialisation.

This is intended to be called once, before using a display with this DisplayControl.

fn display_row_leds(&mut self, row: usize, cols: u32)

Lights LEDs in a single matrix row.

In the specified row, lights exactly the LEDs listed in cols. Turns off all LEDs in the other matrix rows.

In cols, the least-significant bit represents column 0, and so on.

fn light_current_row_leds(&mut self, cols: u32)

Lights additional LEDs in the current matrix row.

Affects the row most recently passed to display_row_leds(). Lights the LEDs listed in cols, in addition to any already lit.

In cols, the least-significant bit represents column 0, and so on.

Implementors