Update timer.rs

田凯夫 · 田凯夫 · commit 5e5f80d496a1 · 2024-03-05T19:09:52.000+08:00
diff --git a/os/src/timer.rs b/os/src/timer.rs
@@ -17,12 +17,12 @@ pub fn get_time() -> usize {
 
 /// get current time in milliseconds
 pub fn get_time_ms() -> usize {
-    time::read() / (CLOCK_FREQ / MSEC_PER_SEC)
+    time::read() * MSEC_PER_SEC / CLOCK_FREQ
 }
 
 /// get current time in microseconds
 pub fn get_time_us() -> usize {
-    time::read() / (CLOCK_FREQ / MICRO_PER_SEC)
+    time::read() * MICRO_PER_SEC / CLOCK_FREQ
 }
 
 /// Set the next timer interrupt

Original file line number	Diff line number	Diff line change
`@@ -17,12 +17,12 @@ pub fn get_time() -> usize {`
`17`	`17`
`18`	`18`	`/// get current time in milliseconds`
`19`	`19`	`pub fn get_time_ms() -> usize {`
`20`		`- time::read() / (CLOCK_FREQ / MSEC_PER_SEC)`
	`20`	`+ time::read() * MSEC_PER_SEC / CLOCK_FREQ`
`21`	`21`	`}`
`22`	`22`
`23`	`23`	`/// get current time in microseconds`
`24`	`24`	`pub fn get_time_us() -> usize {`
`25`		`- time::read() / (CLOCK_FREQ / MICRO_PER_SEC)`
	`25`	`+ time::read() * MICRO_PER_SEC / CLOCK_FREQ`
`26`	`26`	`}`
`27`	`27`
`28`	`28`	`/// Set the next timer interrupt`