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Write letters

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This commit is contained in:
Alexander Neuhäuser
2025-07-27 21:06:17 +02:00
parent a4250898c0
commit e6899097fc
4 changed files with 153 additions and 1 deletions
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20
src/framebuffer.rs
View File

@@ -1,5 +1,9 @@
use core::ptr::write_volatile;
mod bitmaps;
use bitmaps::BASIC_LEGACY;
use crate::{
mailbox::{read_mailbox, write_mailbox},
peripherals::uart::{print, print_u32, print_u32_hex},
@@ -196,6 +200,22 @@ impl FrameBuffer {
}
}
}
pub fn draw_letter(&self, x: u32, y: u32, scale: u32) {
for (y_offset, row) in (&BASIC_LEGACY[0x70]).iter().enumerate() {
for bit in 0..8 {
match row & (1 << bit) {
0 => {}
_ => self.draw_square_fill(
x + (bit * scale),
y + (y_offset as u32 * scale),
x + ((bit + 1) * scale),
y + ((y_offset + 1) as u32 * scale),
),
}
}
}
}
}
pub fn print_display_resolution() {

132
src/framebuffer/bitmaps.rs Normal file
View File

@@ -0,0 +1,132 @@
pub const NOTHING_TO_DISPLAY: [u8; 8] = [0x00; 8];
pub const BASIC_LEGACY: [[u8; 8]; 128] = [
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
NOTHING_TO_DISPLAY,
[0x18, 0x3C, 0x3C, 0x18, 0x18, 0x00, 0x18, 0x00],
[0x36, 0x36, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00],
[0x36, 0x36, 0x7F, 0x36, 0x7F, 0x36, 0x36, 0x00],
[0x0C, 0x3E, 0x03, 0x1E, 0x30, 0x1F, 0x0C, 0x00],
[0x00, 0x63, 0x33, 0x18, 0x0C, 0x66, 0x63, 0x00],
[0x1C, 0x36, 0x1C, 0x6E, 0x3B, 0x33, 0x6E, 0x00],
[0x06, 0x06, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00],
[0x18, 0x0C, 0x06, 0x06, 0x06, 0x0C, 0x18, 0x00],
[0x06, 0x0C, 0x18, 0x18, 0x18, 0x0C, 0x06, 0x00],
[0x00, 0x66, 0x3C, 0xFF, 0x3C, 0x66, 0x00, 0x00],
[0x00, 0x0C, 0x0C, 0x3F, 0x0C, 0x0C, 0x00, 0x00],
[0x00, 0x00, 0x00, 0x00, 0x00, 0x0C, 0x0C, 0x06],
[0x00, 0x00, 0x00, 0x3F, 0x00, 0x00, 0x00, 0x00],
[0x00, 0x00, 0x00, 0x00, 0x00, 0x0C, 0x0C, 0x00],
[0x60, 0x30, 0x18, 0x0C, 0x06, 0x03, 0x01, 0x00],
[0x3E, 0x63, 0x73, 0x7B, 0x6F, 0x67, 0x3E, 0x00],
[0x0C, 0x0E, 0x0C, 0x0C, 0x0C, 0x0C, 0x3F, 0x00],
[0x1E, 0x33, 0x30, 0x1C, 0x06, 0x33, 0x3F, 0x00],
[0x1E, 0x33, 0x30, 0x1C, 0x30, 0x33, 0x1E, 0x00],
[0x38, 0x3C, 0x36, 0x33, 0x7F, 0x30, 0x78, 0x00],
[0x3F, 0x03, 0x1F, 0x30, 0x30, 0x33, 0x1E, 0x00],
[0x1C, 0x06, 0x03, 0x1F, 0x33, 0x33, 0x1E, 0x00],
[0x3F, 0x33, 0x30, 0x18, 0x0C, 0x0C, 0x0C, 0x00],
[0x1E, 0x33, 0x33, 0x1E, 0x33, 0x33, 0x1E, 0x00],
[0x1E, 0x33, 0x33, 0x3E, 0x30, 0x18, 0x0E, 0x00],
[0x00, 0x0C, 0x0C, 0x00, 0x00, 0x0C, 0x0C, 0x00],
[0x00, 0x0C, 0x0C, 0x00, 0x00, 0x0C, 0x0C, 0x06],
[0x18, 0x0C, 0x06, 0x03, 0x06, 0x0C, 0x18, 0x00],
[0x00, 0x00, 0x3F, 0x00, 0x00, 0x3F, 0x00, 0x00],
[0x06, 0x0C, 0x18, 0x30, 0x18, 0x0C, 0x06, 0x00],
[0x1E, 0x33, 0x30, 0x18, 0x0C, 0x00, 0x0C, 0x00],
[0x3E, 0x63, 0x7B, 0x7B, 0x7B, 0x03, 0x1E, 0x00],
[0x0C, 0x1E, 0x33, 0x33, 0x3F, 0x33, 0x33, 0x00],
[0x3F, 0x66, 0x66, 0x3E, 0x66, 0x66, 0x3F, 0x00],
[0x3C, 0x66, 0x03, 0x03, 0x03, 0x66, 0x3C, 0x00],
[0x1F, 0x36, 0x66, 0x66, 0x66, 0x36, 0x1F, 0x00],
[0x7F, 0x46, 0x16, 0x1E, 0x16, 0x46, 0x7F, 0x00],
[0x7F, 0x46, 0x16, 0x1E, 0x16, 0x06, 0x0F, 0x00],
[0x3C, 0x66, 0x03, 0x03, 0x73, 0x66, 0x7C, 0x00],
[0x33, 0x33, 0x33, 0x3F, 0x33, 0x33, 0x33, 0x00],
[0x1E, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x1E, 0x00],
[0x78, 0x30, 0x30, 0x30, 0x33, 0x33, 0x1E, 0x00],
[0x67, 0x66, 0x36, 0x1E, 0x36, 0x66, 0x67, 0x00],
[0x0F, 0x06, 0x06, 0x06, 0x46, 0x66, 0x7F, 0x00],
[0x63, 0x77, 0x7F, 0x7F, 0x6B, 0x63, 0x63, 0x00],
[0x63, 0x67, 0x6F, 0x7B, 0x73, 0x63, 0x63, 0x00],
[0x1C, 0x36, 0x63, 0x63, 0x63, 0x36, 0x1C, 0x00],
[0x3F, 0x66, 0x66, 0x3E, 0x06, 0x06, 0x0F, 0x00],
[0x1E, 0x33, 0x33, 0x33, 0x3B, 0x1E, 0x38, 0x00],
[0x3F, 0x66, 0x66, 0x3E, 0x36, 0x66, 0x67, 0x00],
[0x1E, 0x33, 0x07, 0x0E, 0x38, 0x33, 0x1E, 0x00],
[0x3F, 0x2D, 0x0C, 0x0C, 0x0C, 0x0C, 0x1E, 0x00],
[0x33, 0x33, 0x33, 0x33, 0x33, 0x33, 0x3F, 0x00],
[0x33, 0x33, 0x33, 0x33, 0x33, 0x1E, 0x0C, 0x00],
[0x63, 0x63, 0x63, 0x6B, 0x7F, 0x77, 0x63, 0x00],
[0x63, 0x63, 0x36, 0x1C, 0x1C, 0x36, 0x63, 0x00],
[0x33, 0x33, 0x33, 0x1E, 0x0C, 0x0C, 0x1E, 0x00],
[0x7F, 0x63, 0x31, 0x18, 0x4C, 0x66, 0x7F, 0x00],
[0x1E, 0x06, 0x06, 0x06, 0x06, 0x06, 0x1E, 0x00],
[0x03, 0x06, 0x0C, 0x18, 0x30, 0x60, 0x40, 0x00],
[0x1E, 0x18, 0x18, 0x18, 0x18, 0x18, 0x1E, 0x00],
[0x08, 0x1C, 0x36, 0x63, 0x00, 0x00, 0x00, 0x00],
[0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF],
[0x0C, 0x0C, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00],
[0x00, 0x00, 0x1E, 0x30, 0x3E, 0x33, 0x6E, 0x00],
[0x07, 0x06, 0x06, 0x3E, 0x66, 0x66, 0x3B, 0x00],
[0x00, 0x00, 0x1E, 0x33, 0x03, 0x33, 0x1E, 0x00],
[0x38, 0x30, 0x30, 0x3e, 0x33, 0x33, 0x6E, 0x00],
[0x00, 0x00, 0x1E, 0x33, 0x3f, 0x03, 0x1E, 0x00],
[0x1C, 0x36, 0x06, 0x0f, 0x06, 0x06, 0x0F, 0x00],
[0x00, 0x00, 0x6E, 0x33, 0x33, 0x3E, 0x30, 0x1F],
[0x07, 0x06, 0x36, 0x6E, 0x66, 0x66, 0x67, 0x00],
[0x0C, 0x00, 0x0E, 0x0C, 0x0C, 0x0C, 0x1E, 0x00],
[0x30, 0x00, 0x30, 0x30, 0x30, 0x33, 0x33, 0x1E],
[0x07, 0x06, 0x66, 0x36, 0x1E, 0x36, 0x67, 0x00],
[0x0E, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x1E, 0x00],
[0x00, 0x00, 0x33, 0x7F, 0x7F, 0x6B, 0x63, 0x00],
[0x00, 0x00, 0x1F, 0x33, 0x33, 0x33, 0x33, 0x00],
[0x00, 0x00, 0x1E, 0x33, 0x33, 0x33, 0x1E, 0x00],
[0x00, 0x00, 0x3B, 0x66, 0x66, 0x3E, 0x06, 0x0F],
[0x00, 0x00, 0x6E, 0x33, 0x33, 0x3E, 0x30, 0x78],
[0x00, 0x00, 0x3B, 0x6E, 0x66, 0x06, 0x0F, 0x00],
[0x00, 0x00, 0x3E, 0x03, 0x1E, 0x30, 0x1F, 0x00],
[0x08, 0x0C, 0x3E, 0x0C, 0x0C, 0x2C, 0x18, 0x00],
[0x00, 0x00, 0x33, 0x33, 0x33, 0x33, 0x6E, 0x00],
[0x00, 0x00, 0x33, 0x33, 0x33, 0x1E, 0x0C, 0x00],
[0x00, 0x00, 0x63, 0x6B, 0x7F, 0x7F, 0x36, 0x00],
[0x00, 0x00, 0x63, 0x36, 0x1C, 0x36, 0x63, 0x00],
[0x00, 0x00, 0x33, 0x33, 0x33, 0x3E, 0x30, 0x1F],
[0x00, 0x00, 0x3F, 0x19, 0x0C, 0x26, 0x3F, 0x00],
[0x38, 0x0C, 0x0C, 0x07, 0x0C, 0x0C, 0x38, 0x00],
[0x18, 0x18, 0x18, 0x00, 0x18, 0x18, 0x18, 0x00],
[0x07, 0x0C, 0x0C, 0x38, 0x0C, 0x0C, 0x07, 0x00],
[0x6E, 0x3B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00],
NOTHING_TO_DISPLAY,
];

1
src/main.rs
View File

@@ -107,6 +107,7 @@ pub extern "C" fn kernel_main() -> ! {
fb.draw_square_fill(800, 800, 900, 900);
fb.draw_square_fill(1000, 800, 1200, 700);
fb.draw_square_fill(900, 100, 800, 150);
fb.draw_letter(500, 5, 4);
loop {
let temp = read_soc_temp();

1
tools/start_simulator.sh
View File

@@ -8,5 +8,4 @@ qemu-system-aarch64 \
-cpu cortex-a53 \
-serial stdio \
-sd ../sd.img \
-display none \
-kernel ../target/aarch64-unknown-none/release/kernel8.img