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timer consts

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This commit is contained in:
Alex Janka 2023-02-15 09:01:05 +11:00
parent 28fb90c8d6
commit 7ff06f151e
2 changed files with 4 additions and 6 deletions
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4
src/processor/mod.rs
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@ -40,10 +40,6 @@ pub struct Cpu {
cycle_start: Instant,
}
// Hz
const CLOCK_SPEED: usize = 4194304;
const SPEEDUP: f64 = 1.;
impl Cpu {
pub fn new(
mut memory: Memory,

6
src/processor/timer.rs
View file

@ -1,7 +1,7 @@
use std::time::Duration;
use crate::{
processor::{Cpu, CLOCK_SPEED, SPEEDUP},
processor::Cpu,
util::{get_bit, set_bit},
};
@ -19,6 +19,8 @@ impl Timers {
}
}
// Hz
const CLOCK_SPEED: usize = 4194304;
// this will need to change when cgb mode is implemented
// as it uses bit 5 in double speed mode
const AUDIO_BIT: u8 = 4;
@ -68,7 +70,7 @@ impl Cpu {
pub(super) fn sleep(&mut self, machine_cycles: u8) {
let secs = ((machine_cycles as f64) * 4.) / CLOCK_SPEED as f64;
if let Some(remaining) =
Duration::from_secs_f64(secs / SPEEDUP).checked_sub(self.cycle_start.elapsed())
Duration::from_secs_f64(secs).checked_sub(self.cycle_start.elapsed())
{
spin_sleep::sleep(remaining);
}