update rustc version

Author: dotcypress

src/crc.rs

@@ -21,7 +21,6 @@
 use crate::rcc::{Enable, Rcc, Reset};
 use crate::stm32::CRC;
 use core::hash::Hasher;
-use core::ptr;
 
 /// Extension trait to constrain the CRC peripheral.
 pub trait CrcExt {
@@ -174,11 +173,8 @@ impl Crc {
     pub fn feed(&mut self, data: &[u8]) {
         let crc = unsafe { &(*CRC::ptr()) };
         for byte in data {
-            unsafe {
-                // Workaround with svd2rust, it does not generate the byte interface to the DR
-                // register
-                ptr::write_volatile(&crc.dr as *const _ as *mut u8, *byte);
-            }
+            let ptr = &crc.dr as *const _;
+            unsafe { core::ptr::write_volatile(ptr as *mut u8, *byte) };
         }
     }
 

src/gpio.rs

@@ -445,9 +445,9 @@ macro_rules! gpio {
                             let _ = &(*$GPIOX::ptr()).pupdr.modify(|r, w| {
                                 w.bits(r.bits() & !(0b11 << offset))
                             });
-                            &(*$GPIOX::ptr()).moder.modify(|r, w| {
+                            let _ = &(*$GPIOX::ptr()).moder.modify(|r, w| {
                                 w.bits(r.bits() & !(0b11 << offset))
-                            })
+                            });
                         };
                         let offset = ($i % 4) * 8;
                         let mask = $Pxn << offset;
@@ -475,9 +475,9 @@ macro_rules! gpio {
                     pub fn set_speed(self, speed: Speed) -> Self {
                         let offset = 2 * $i;
                         unsafe {
-                            &(*$GPIOX::ptr()).ospeedr.modify(|r, w| {
+                            let _ = &(*$GPIOX::ptr()).ospeedr.modify(|r, w| {
                                 w.bits((r.bits() & !(0b11 << offset)) | ((speed as u32) << offset))
-                            })
+                            });
                         };
                         self
                     }

src/spi.rs

@@ -264,8 +264,8 @@ macro_rules! spi {
                 } else if sr.crcerr().bit_is_set() {
                     nb::Error::Other(Error::Crc)
                 } else if sr.txe().bit_is_set() {
-                    // NOTE(write_volatile) see note above
-                    unsafe { ptr::write_volatile(&self.spi.dr as *const _ as *mut u8, byte) }
+                    let ptr = &self.spi.dr as *const _;
+                    unsafe { core::ptr::write_volatile(ptr as *mut u8, byte) };
                     return Ok(());
                 } else {
                     nb::Error::WouldBlock