improve e-h 1.0 Delay impl

rursprung · rursprung · commit 21a41636783d · 2024-02-12T13:39:15.000+01:00
this is a follow-up to commit 403cf3b / PR Rahix#492, based on a review comment by @jannic on cortex-m (see PR [cortex-m#504]). [cortex-m#504]: rust-embedded/cortex-m#504 (comment)
diff --git a/avr-hal-generic/src/delay.rs b/avr-hal-generic/src/delay.rs
@@ -301,7 +301,7 @@ impl<SPEED> DelayNs for Delay<SPEED>
     fn delay_ns(&mut self, ns: u32) {
         // quick-win to get an initial implementation.
         // note that the trait does not guarantee nanosecond-accuracy.
-        delay_v0::DelayUs::<u32>::delay_us(self, ns.saturating_add(999) / 1000)
+        delay_v0::DelayUs::<u32>::delay_us(self, ns.div_ceil(1000))
     }
 
     fn delay_us(&mut self, us: u32) {

Original file line number	Diff line number	Diff line change
`@@ -301,7 +301,7 @@ impl<SPEED> DelayNs for Delay<SPEED>`
`301`	`301`	`fn delay_ns(&mut self, ns: u32) {`
`302`	`302`	`// quick-win to get an initial implementation.`
`303`	`303`	`// note that the trait does not guarantee nanosecond-accuracy.`
`304`		`- delay_v0::DelayUs::<u32>::delay_us(self, ns.saturating_add(999) / 1000)`
	`304`	`+ delay_v0::DelayUs::<u32>::delay_us(self, ns.div_ceil(1000))`
`305`	`305`	`}`
`306`	`306`
`307`	`307`	`fn delay_us(&mut self, us: u32) {`