forked from AbleOS/ableos
Documenting a bit in interrupts
This commit is contained in:
parent
f0ca90ae25
commit
2bd5ffb4eb
|
@ -177,11 +177,17 @@ pub fn init_idt() {
|
|||
IDT.load();
|
||||
}
|
||||
|
||||
/// https://wiki.osdev.org/Pit
|
||||
///
|
||||
const PIT_MAX_FREQ: u32 = 1193180;
|
||||
|
||||
pub fn set_pit_frequency(pit: u16, freq: u32) {
|
||||
// Dividing the maximum frequency by the desired frequency
|
||||
// gives roughly what the maximum value for the timer
|
||||
// counter should be to run at the desired frequency.
|
||||
let ret = (PIT_MAX_FREQ / freq).try_into();
|
||||
|
||||
// Type-bounded counter maximum.
|
||||
let divisor: u16 = match ret {
|
||||
Ok(div) => div,
|
||||
Err(err) => {
|
||||
|
|
Loading…
Reference in a new issue