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Use volatile writes for printing to screen

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This commit is contained in:
Philipp Oppermann 2017-04-12 19:24:25 +02:00
parent 6aa3f67331
commit 0ed21fb943
3 changed files with 6 additions and 3 deletions
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1
Cargo.toml
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@ -8,3 +8,4 @@ crate-type = ["staticlib"]
[dependencies]
rlibc = "1.0"
volatile = "0.1.0"

1
src/lib.rs
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@ -4,6 +4,7 @@
#![no_std]
extern crate rlibc;
extern crate volatile;
mod vga_buffer;

7
src/vga_buffer.rs
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@ -1,4 +1,5 @@
use core::ptr::Unique;
use volatile::Volatile;
#[allow(dead_code)]
#[derive(Debug, Clone, Copy)]
@ -42,7 +43,7 @@ const BUFFER_HEIGHT: usize = 25;
const BUFFER_WIDTH: usize = 80;
struct Buffer {
chars: [[ScreenChar; BUFFER_WIDTH]; BUFFER_HEIGHT],
chars: [[Volatile<ScreenChar>; BUFFER_WIDTH]; BUFFER_HEIGHT],
}
pub struct Writer {
@ -64,10 +65,10 @@ impl Writer {
let col = self.column_position;
let color_code = self.color_code;
self.buffer().chars[row][col] = ScreenChar {
self.buffer().chars[row][col].write(ScreenChar {
ascii_character: byte,
color_code: color_code,
};
});
self.column_position += 1;
}
}