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Add volatile crate

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This commit is contained in:
greg 2019-07-10 02:27:20 -07:00
parent 0e9bff7bff
commit 65c824e104
2 changed files with 6 additions and 3 deletions
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1
Cargo.toml
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@ -12,4 +12,5 @@ panic = "abort"
[dependencies] [dependencies]
bootloader = "0.6.0" bootloader = "0.6.0"
volatile = "0.2.6"

8
src/vga_buffer.rs
View File

@ -1,3 +1,5 @@
use volatile::Volatile;
#[allow(dead_code)] #[allow(dead_code)]
#[derive(Debug, Clone, Copy, PartialEq, Eq)] #[derive(Debug, Clone, Copy, PartialEq, Eq)]
#[repr(u8)] #[repr(u8)]
@ -42,7 +44,7 @@ const BUFFER_HEIGHT: usize = 25;
#[repr(transparent)] #[repr(transparent)]
struct Buffer { struct Buffer {
chars: [[ScreenChar; BUFFER_WIDTH]; BUFFER_HEIGHT], chars: [[Volatile<ScreenChar>; BUFFER_WIDTH]; BUFFER_HEIGHT],
} }
pub struct Writer { pub struct Writer {
@ -71,9 +73,9 @@ impl Writer {
let row = BUFFER_HEIGHT - 1; let row = BUFFER_HEIGHT - 1;
let col = self.column_position; let col = self.column_position;
let color_code = self.color_code; let color_code = self.color_code;
self.buffer.chars[row][col] = ScreenChar { self.buffer.chars[row][col].write(ScreenChar {
ascii_char: byte, color_code, ascii_char: byte, color_code,
}; });
self.column_position += 1; self.column_position += 1;
} }
} }