Add rand-core v0.9 support.

Co-Authored-By: Aurélien Jacobs <aurel@gnuage.org>

embassy-rp/Cargo.toml

@@ -157,7 +157,6 @@ embedded-io = { version = "0.6.1" }
 embedded-io-async = { version = "0.6.1" }
 embedded-storage = { version = "0.3" }
 embedded-storage-async = { version = "0.4.1" }
-rand_core = "0.6.4"
 fixed = "1.28.0"
 
 rp-pac = { version = "7.0.0" }
@@ -167,6 +166,9 @@ embedded-hal-1 = { package = "embedded-hal", version = "1.0" }
 embedded-hal-async = { version = "1.0" }
 embedded-hal-nb = { version = "1.0" }
 
+rand-core-06 = { package = "rand_core", version = "0.6" }
+rand-core-09 = { package = "rand_core", version = "0.9" }
+
 pio = { version = "0.3" }
 rp2040-boot2 = "0.3"
 document-features = "0.2.10"

embassy-rp/src/clocks.rs

@@ -1776,7 +1776,8 @@ impl<'d, T: GpoutPin> Drop for Gpout<'d, T> {
 pub struct RoscRng;
 
 impl RoscRng {
-    fn next_u8() -> u8 {
+    /// Get a random u8
+    pub fn next_u8() -> u8 {
         let random_reg = pac::ROSC.randombit();
         let mut acc = 0;
         for _ in 0..u8::BITS {
@@ -1785,26 +1786,60 @@ impl RoscRng {
         }
         acc
     }
-}
 
-impl rand_core::RngCore for RoscRng {
-    fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), rand_core::Error> {
-        Ok(self.fill_bytes(dest))
+    /// Get a random u32
+    pub fn next_u32(&mut self) -> u32 {
+        rand_core_09::impls::next_u32_via_fill(self)
     }
 
-    fn next_u32(&mut self) -> u32 {
-        rand_core::impls::next_u32_via_fill(self)
+    /// Get a random u64
+    pub fn next_u64(&mut self) -> u64 {
+        rand_core_09::impls::next_u64_via_fill(self)
     }
 
-    fn next_u64(&mut self) -> u64 {
-        rand_core::impls::next_u64_via_fill(self)
-    }
-
-    fn fill_bytes(&mut self, dest: &mut [u8]) {
+    /// Fill a slice with random bytes
+    pub fn fill_bytes(&mut self, dest: &mut [u8]) {
         dest.fill_with(Self::next_u8)
     }
 }
 
+impl rand_core_06::RngCore for RoscRng {
+    fn next_u32(&mut self) -> u32 {
+        self.next_u32()
+    }
+
+    fn next_u64(&mut self) -> u64 {
+        self.next_u64()
+    }
+
+    fn fill_bytes(&mut self, dest: &mut [u8]) {
+        self.fill_bytes(dest);
+    }
+
+    fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), rand_core_06::Error> {
+        self.fill_bytes(dest);
+        Ok(())
+    }
+}
+
+impl rand_core_06::CryptoRng for RoscRng {}
+
+impl rand_core_09::RngCore for RoscRng {
+    fn next_u32(&mut self) -> u32 {
+        self.next_u32()
+    }
+
+    fn next_u64(&mut self) -> u64 {
+        self.next_u64()
+    }
+
+    fn fill_bytes(&mut self, dest: &mut [u8]) {
+        self.fill_bytes(dest);
+    }
+}
+
+impl rand_core_09::CryptoRng for RoscRng {}
+
 /// Enter the `DORMANT` sleep state. This will stop *all* internal clocks
 /// and can only be exited through resets, dormant-wake GPIO interrupts,
 /// and RTC interrupts. If RTC is clocked from an internal clock source

embassy-rp/src/trng.rs

@@ -7,7 +7,6 @@ use core::task::Poll;
 
 use embassy_hal_internal::{Peri, PeripheralType};
 use embassy_sync::waitqueue::AtomicWaker;
-use rand_core::Error;
 
 use crate::interrupt::typelevel::{Binding, Interrupt};
 use crate::peripherals::TRNG;
@@ -369,7 +368,7 @@ impl<'d, T: Instance> Trng<'d, T> {
     }
 }
 
-impl<'d, T: Instance> rand_core::RngCore for Trng<'d, T> {
+impl<'d, T: Instance> rand_core_06::RngCore for Trng<'d, T> {
     fn next_u32(&mut self) -> u32 {
         self.blocking_next_u32()
     }
@@ -379,16 +378,32 @@ impl<'d, T: Instance> rand_core::RngCore for Trng<'d, T> {
     }
 
     fn fill_bytes(&mut self, dest: &mut [u8]) {
-        self.blocking_fill_bytes(dest)
+        self.blocking_fill_bytes(dest);
     }
 
-    fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), Error> {
+    fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), rand_core_06::Error> {
         self.blocking_fill_bytes(dest);
         Ok(())
     }
 }
 
-impl<'d, T: Instance> rand_core::CryptoRng for Trng<'d, T> {}
+impl<'d, T: Instance> rand_core_06::CryptoRng for Trng<'d, T> {}
+
+impl<'d, T: Instance> rand_core_09::RngCore for Trng<'d, T> {
+    fn next_u32(&mut self) -> u32 {
+        self.blocking_next_u32()
+    }
+
+    fn next_u64(&mut self) -> u64 {
+        self.blocking_next_u64()
+    }
+
+    fn fill_bytes(&mut self, dest: &mut [u8]) {
+        self.blocking_fill_bytes(dest);
+    }
+}
+
+impl<'d, T: Instance> rand_core_09::CryptoRng for Trng<'d, T> {}
 
 /// TRNG interrupt handler.
 pub struct InterruptHandler<T: Instance> {