Pico Pico - Embedded Programming with Rust

Multi Custom character

I attempted to create the Ferris image using 6 adjacent grids with the generator from the previous page. Here’s the Rust code to utilize those byte arrays.

Generated Byte array for the characters

#![allow(unused)]
fn main() {
const SYMBOL1: [u8; 8] = [
    0b00110, 0b01000, 0b01110, 0b01000, 0b00100, 0b00011, 0b00100, 0b01000,
];

const SYMBOL2: [u8; 8] = [
    0b00000, 0b00000, 0b00000, 0b10001, 0b10001, 0b11111, 0b00000, 0b00000,
];

const SYMBOL3: [u8; 8] = [
    0b01100, 0b00010, 0b01110, 0b00010, 0b00100, 0b11000, 0b00100, 0b00010,
];

const SYMBOL4: [u8; 8] = [
    0b01000, 0b01000, 0b00100, 0b00011, 0b00001, 0b00010, 0b00101, 0b01000,
];

const SYMBOL5: [u8; 8] = [
    0b00000, 0b00000, 0b00000, 0b11111, 0b01010, 0b10001, 0b00000, 0b00000,
];

const SYMBOL6: [u8; 8] = [
    0b00010, 0b00010, 0b00100, 0b11000, 0b10000, 0b01000, 0b10100, 0b00010,
];
}

Declare them as character

#![allow(unused)]
fn main() {
lcd.custom_char(&mut timer, &SYMBOL1, 0);
lcd.custom_char(&mut timer, &SYMBOL2, 1);
lcd.custom_char(&mut timer, &SYMBOL3, 2);
lcd.custom_char(&mut timer, &SYMBOL4, 3);
lcd.custom_char(&mut timer, &SYMBOL5, 4);
lcd.custom_char(&mut timer, &SYMBOL6, 5);
}

Display

Let’s write the first 3 grids into the first row, then the second half into the second row of the LCD display.

#![allow(unused)]
fn main() {
lcd.set_cursor(&mut timer, 0, 4)
    .write(&mut timer, CustomChar(0))
    .write(&mut timer, CustomChar(1))
    .write(&mut timer, CustomChar(2));

lcd.set_cursor(&mut timer, 1, 4)
    .write(&mut timer, CustomChar(3))
    .write(&mut timer, CustomChar(4))
    .write(&mut timer, CustomChar(5));
}

Clone the existing project

You can clone (or refer) project I created and navigate to the lcd-custom-multi folder.

git clone https://github.com/ImplFerris/pico2-rp-projects
cd pico2-projects/lcd-custom-multi/