microrust/src/display/03.01.LAYOUT.md

Layout

Convert a 5x5 array into a 3x9 array to match the display's circuitry.

const LED_LAYOUT: [[(usize, usize); 5]; 5] = [
    [(0, 0), (1, 3), (0, 1), (1, 4), (0, 2)],
    [(2, 3), (2, 4), (2, 5), (2, 6), (2, 7)],
    [(1, 1), (0, 8), (1, 2), (2, 8), (1, 0)],
    [(0, 7), (0, 6), (0, 5), (0, 4), (0, 3)],
    [(2, 2), (1, 6), (2, 0), (1, 5), (2, 1)],
];

/// Convert 5x5 display image to 3x9 matrix image
pub fn display2matrix(led_display: [[u8; 5]; 5]) -> [[u8; 9]; 3] {
    // Create 3x9 array
    let mut led_matrix: [[u8; 9]; 3] = [[0; 9]; 3];
    // Iterate through zip of input array and layout array
    for (led_display_row, layout_row) in led_display.iter().zip(LED_LAYOUT.iter()) {
        // Continue iterating through rows
        for (led_display_val, layout_loc) in led_display_row.iter().zip(layout_row) {
            // Assign dereferenced val to array
            led_matrix[layout_loc.0][layout_loc.1] = *led_display_val;
        }
    }
    return led_matrix;
}