feat: Allow the construction of systick Delay using the clock::v2 API (…

…#803)

hal/src/delay.rs

@@ -1,5 +1,6 @@
 //! Delays
 
+use atsamd_hal_macros::hal_cfg;
 use cortex_m::peripheral::syst::SystClkSource;
 use cortex_m::peripheral::SYST;
 
@@ -8,6 +9,12 @@ use crate::ehal::delay::DelayNs;
 use crate::ehal_02;
 use crate::time::Hertz;
 
+#[hal_cfg("rtc-d5x")]
+use crate::typelevel::Increment;
+
+#[hal_cfg("rtc-d5x")]
+use crate::clock::v2::{gclk::Gclk0Id, Source};
+
 /// System timer (SysTick) as a delay provider
 pub struct Delay {
     sysclock: Hertz,
@@ -25,6 +32,23 @@ impl Delay {
         }
     }
 
+    #[hal_cfg("rtc-d5x")]
+    /// Configures the system timer (SysTick) as a delay provide, compatible
+    /// with the V2 clocking API
+    pub fn new_with_source<S>(mut syst: SYST, gclk0: S) -> (Self, S::Inc)
+    where
+        S: Source<Id = Gclk0Id> + Increment,
+    {
+        syst.set_clock_source(SystClkSource::Core);
+        (
+            Delay {
+                syst,
+                sysclock: gclk0.freq(),
+            },
+            gclk0.inc(),
+        )
+    }
+
     /// Releases the system timer (SysTick) resource
     pub fn free(self) -> SYST {
         self.syst