diff --git a/rp2040-hal/Cargo.toml b/rp2040-hal/Cargo.toml
index 293120799..0a8b2fc38 100644
--- a/rp2040-hal/Cargo.toml
+++ b/rp2040-hal/Cargo.toml
@@ -18,8 +18,8 @@ targets = ["thumbv6m-none-eabi"]
 [dependencies]
 cortex-m = "0.7.2"
 embedded-hal = { version = "0.2.5", features = ["unproven"] }
-eh1_0_alpha = { package = "embedded-hal", version = "=1.0.0-rc.1",  optional = true }
-eh_nb_1_0_alpha = { package = "embedded-hal-nb", version = "=1.0.0-rc.1",  optional = true }
+eh1_0_alpha = { package = "embedded-hal", version = "=1.0.0-rc.3",  optional = true }
+eh_nb_1_0_alpha = { package = "embedded-hal-nb", version = "=1.0.0-rc.3",  optional = true }
 embedded-dma = "0.2.0"
 fugit = "0.3.6"
 itertools = { version = "0.10.1", default-features = false }
diff --git a/rp2040-hal/src/gpio/mod.rs b/rp2040-hal/src/gpio/mod.rs
index 00923ad12..b54f71f67 100644
--- a/rp2040-hal/src/gpio/mod.rs
+++ b/rp2040-hal/src/gpio/mod.rs
@@ -1434,11 +1434,11 @@ mod eh1 {
         I: PinId,
         P: PullType,
     {
-        fn is_set_high(&self) -> Result<bool, Self::Error> {
+        fn is_set_high(&mut self) -> Result<bool, Self::Error> {
             Ok(self._is_set_high())
         }
 
-        fn is_set_low(&self) -> Result<bool, Self::Error> {
+        fn is_set_low(&mut self) -> Result<bool, Self::Error> {
             Ok(self._is_set_low())
         }
     }
@@ -1459,11 +1459,11 @@ mod eh1 {
         I: PinId,
         P: PullType,
     {
-        fn is_high(&self) -> Result<bool, Self::Error> {
+        fn is_high(&mut self) -> Result<bool, Self::Error> {
             Ok(self._is_high())
         }
 
-        fn is_low(&self) -> Result<bool, Self::Error> {
+        fn is_low(&mut self) -> Result<bool, Self::Error> {
             Ok(self._is_low())
         }
     }
@@ -1480,11 +1480,11 @@ mod eh1 {
     impl<'a, I: PinId, F: super::func::Function, P: PullType> InputPin
         for super::AsInputPin<'a, I, F, P>
     {
-        fn is_high(&self) -> Result<bool, Self::Error> {
+        fn is_high(&mut self) -> Result<bool, Self::Error> {
             Ok(self.0._is_high())
         }
 
-        fn is_low(&self) -> Result<bool, Self::Error> {
+        fn is_low(&mut self) -> Result<bool, Self::Error> {
             Ok(self.0._is_low())
         }
     }
diff --git a/rp2040-hal/src/timer.rs b/rp2040-hal/src/timer.rs
index ca6832a3c..4b897c6c9 100644
--- a/rp2040-hal/src/timer.rs
+++ b/rp2040-hal/src/timer.rs
@@ -167,10 +167,26 @@ macro_rules! impl_delay_traits {
 impl_delay_traits!(u8, u16, u32, i32);
 
 #[cfg(feature = "eh1_0_alpha")]
-impl eh1_0_alpha::delay::DelayUs for Timer {
+impl eh1_0_alpha::delay::DelayNs for Timer {
+    fn delay_ns(&mut self, ns: u32) {
+        // For now, just use microsecond delay, internally. Of course, this
+        // might cause a much longer delay than necessary. So a more advanced
+        // implementation would be desirable for sub-microsecond delays.
+        let us = ns / 1000 + if ns % 1000 == 0 { 0 } else { 1 };
+        // With rustc 1.73, this can be replaced by:
+        // let us = ns.div_ceil(1000);
+        self.delay_us_internal(us)
+    }
+
     fn delay_us(&mut self, us: u32) {
         self.delay_us_internal(us)
     }
+
+    fn delay_ms(&mut self, ms: u32) {
+        for _ in 0..ms {
+            self.delay_us_internal(1000);
+        }
+    }
 }
 
 /// Implementation of the embedded_hal::Timer traits using rp2040_hal::timer counter