continue improvements

examples/embassy/src/bin/uart-echo-with-irq.rs

@@ -128,17 +128,14 @@ async fn blinky(mut led: Pin<PG5, OutputReadablePushPull>) {
 fn UART0_RX() {
     let mut buf: [u8; 16] = [0; 16];
     let mut read_len: usize = 0;
-    let mut irq_error = None;
+    let mut errors = None;
     RX.lock(|static_rx| {
         let mut rx_borrow = static_rx.borrow_mut();
         let rx_mut_ref = rx_borrow.as_mut().unwrap();
-        match rx_mut_ref.irq_handler(&mut buf) {
-            Ok(result) => {
+        let result = rx_mut_ref.irq_handler(&mut buf);
         read_len = result.bytes_read;
-            }
-            Err(e) => {
-                irq_error = Some(e);
-            }
+        if result.errors.is_some() {
+            errors = result.errors;
         }
     });
     let mut ringbuf_full = false;
@@ -155,8 +152,8 @@ fn UART0_RX() {
         });
     }
 
-    if irq_error.is_some() {
-        rprintln!("error in IRQ handler: {:?}", irq_error);
+    if errors.is_some() {
+        rprintln!("UART error: {:?}", errors);
     }
     if ringbuf_full {
         rprintln!("ringbuffer is full, deleted oldest data");

flashloader/src/main.rs

@@ -293,8 +293,8 @@ mod app {
                         .read_fixed_len_or_timeout_based_using_irq(cx.local.rx_context)
                         .expect("read operation failed");
                 }
-                if result.error() {
-                    log::warn!("UART error: {:?}", result.error());
+                if result.has_errors() {
+                    log::warn!("UART error: {:?}", result.errors.unwrap());
                 }
             }
             Err(e) => {

va416xx-hal/src/gpio/reg.rs

@@ -113,14 +113,6 @@ pub(super) unsafe trait RegisterInterface {
     /// this type.
     fn id(&self) -> DynPinId;
 
-    const PORTA: *const PortRegisterBlock = Porta::ptr();
-    const PORTB: *const PortRegisterBlock = Portb::ptr();
-    const PORTC: *const PortRegisterBlock = Portc::ptr();
-    const PORTD: *const PortRegisterBlock = Portd::ptr();
-    const PORTE: *const PortRegisterBlock = Porte::ptr();
-    const PORTF: *const PortRegisterBlock = Portf::ptr();
-    const PORTG: *const PortRegisterBlock = Portg::ptr();
-
     /// Change the pin mode
     #[inline]
     fn change_mode(&mut self, mode: DynPinMode) {
@@ -155,13 +147,13 @@ pub(super) unsafe trait RegisterInterface {
     #[inline]
     fn port_reg(&self) -> &PortRegisterBlock {
         match self.id().group {
-            DynGroup::A => unsafe { &(*Self::PORTA) },
-            DynGroup::B => unsafe { &(*Self::PORTB) },
-            DynGroup::C => unsafe { &(*Self::PORTC) },
-            DynGroup::D => unsafe { &(*Self::PORTD) },
-            DynGroup::E => unsafe { &(*Self::PORTE) },
-            DynGroup::F => unsafe { &(*Self::PORTF) },
-            DynGroup::G => unsafe { &(*Self::PORTG) },
+            DynGroup::A => unsafe { &(*Porta::ptr()) },
+            DynGroup::B => unsafe { &(*Portb::ptr()) },
+            DynGroup::C => unsafe { &(*Portc::ptr()) },
+            DynGroup::D => unsafe { &(*Portd::ptr()) },
+            DynGroup::E => unsafe { &(*Porte::ptr()) },
+            DynGroup::F => unsafe { &(*Portf::ptr()) },
+            DynGroup::G => unsafe { &(*Portg::ptr()) },
         }
     }
 

va416xx-hal/src/uart.rs

@@ -70,6 +70,10 @@ impl RxPin<Uart2> for Pin<PF9, AltFunc1> {}
 // Regular Definitions
 //==================================================================================================
 
+#[derive(Debug, PartialEq, Eq)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
+pub struct TransferPendingError;
+
 #[derive(Debug, PartialEq, Eq)]
 #[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum RxError {
@@ -82,8 +86,6 @@ pub enum RxError {
 pub enum Error {
     Rx(RxError),
     BreakCondition,
-    TransferPending,
-    BufferTooShort,
 }
 
 impl From<RxError> for Error {
@@ -243,50 +245,47 @@ impl IrqContextTimeoutOrMaxSize {
 #[derive(Debug, Default)]
 pub struct IrqResult {
     pub bytes_read: usize,
-    pub errors: IrqUartError,
+    pub errors: Option<IrqUartError>,
 }
 
 /// This struct is used to return the default IRQ handler result to the user
 #[derive(Debug, Default)]
-pub struct IrqResultMaxSizeTimeout {
+pub struct IrqResultMaxSizeOrTimeout {
     complete: bool,
     timeout: bool,
-    pub errors: IrqUartError,
+    pub errors: Option<IrqUartError>,
     pub bytes_read: usize,
 }
 
-impl IrqResultMaxSizeTimeout {
+impl IrqResultMaxSizeOrTimeout {
     pub fn new() -> Self {
-        IrqResultMaxSizeTimeout {
+        IrqResultMaxSizeOrTimeout {
             complete: false,
             timeout: false,
-            errors: IrqUartError::default(),
+            errors: None,
             bytes_read: 0,
         }
     }
 }
-impl IrqResultMaxSizeTimeout {
+impl IrqResultMaxSizeOrTimeout {
     #[inline]
-    pub fn error(&self) -> bool {
-        if self.errors.overflow || self.errors.parity || self.errors.framing {
-            return true;
-        }
-        false
+    pub fn has_errors(&self) -> bool {
+        self.errors.is_some()
     }
 
     #[inline]
     pub fn overflow_error(&self) -> bool {
-        self.errors.overflow
+        self.errors.map_or(false, |e| e.overflow)
     }
 
     #[inline]
     pub fn framing_error(&self) -> bool {
-        self.errors.framing
+        self.errors.map_or(false, |e| e.framing)
     }
 
     #[inline]
     pub fn parity_error(&self) -> bool {
-        self.errors.parity
+        self.errors.map_or(false, |e| e.parity)
     }
 
     #[inline]
@@ -747,7 +746,7 @@ impl<Uart: Instance> Tx<Uart> {
     }
 }
 
-#[derive(Default, Debug)]
+#[derive(Default, Debug, Copy, Clone)]
 pub struct IrqUartError {
     overflow: bool,
     framing: bool,
@@ -784,10 +783,11 @@ impl IrqUartError {
     }
 }
 
-#[derive(Debug)]
-pub enum IrqError {
-    BufferTooShort { found: usize, expected: usize },
-    Uart(IrqUartError),
+#[derive(Debug, PartialEq, Eq)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
+pub struct BufferTooShortError {
+    found: usize,
+    expected: usize,
 }
 
 /// Serial receiver, using interrupts to offload reading to the hardware.
@@ -833,9 +833,9 @@ impl<Uart: Instance> RxWithIrq<Uart> {
     pub fn read_fixed_len_or_timeout_based_using_irq(
         &mut self,
         context: &mut IrqContextTimeoutOrMaxSize,
-    ) -> Result<(), Error> {
+    ) -> Result<(), TransferPendingError> {
         if context.mode != IrqReceptionMode::Idle {
-            return Err(Error::TransferPending);
+            return Err(TransferPendingError);
         }
         context.mode = IrqReceptionMode::Pending;
         context.rx_idx = 0;
@@ -874,8 +874,9 @@ impl<Uart: Instance> RxWithIrq<Uart> {
     /// result of the operation.
     ///
     /// This function will not disable the RX interrupts, so you don't need to call any other
-    /// API after calling this function to continue emptying the FIFO.
-    pub fn irq_handler(&mut self, buf: &mut [u8; 16]) -> Result<IrqResult, IrqUartError> {
+    /// API after calling this function to continue emptying the FIFO. RX errors are handled
+    /// as partial errors and are returned as part of the [IrqResult].
+    pub fn irq_handler(&mut self, buf: &mut [u8; 16]) -> IrqResult {
         let mut result = IrqResult::default();
 
         let irq_end = self.uart().irq_end().read();
@@ -917,7 +918,7 @@ impl<Uart: Instance> RxWithIrq<Uart> {
         self.uart()
             .irq_clr()
             .write(|w| unsafe { w.bits(irq_end.bits()) });
-        Ok(result)
+        result
     }
 
     /// This function should be called in the user provided UART interrupt handler.
@@ -930,19 +931,20 @@ impl<Uart: Instance> RxWithIrq<Uart> {
     /// [IrqContextTimeoutOrMaxSize] structure.
     ///
     /// If passed buffer is equal to or larger than the specified maximum length, an
-    /// [`Error::BufferTooShort`] will be returned
+    /// [BufferTooShortError] will be returned. Other RX errors are treated as partial errors
+    /// and returned inside the [IrqResultMaxSizeOrTimeout] structure.
     pub fn irq_handler_max_size_or_timeout_based(
         &mut self,
         context: &mut IrqContextTimeoutOrMaxSize,
         buf: &mut [u8],
-    ) -> Result<IrqResultMaxSizeTimeout, IrqError> {
+    ) -> Result<IrqResultMaxSizeOrTimeout, BufferTooShortError> {
         if buf.len() < context.max_len {
-            return Err(IrqError::BufferTooShort {
+            return Err(BufferTooShortError {
                 found: buf.len(),
                 expected: context.max_len,
             });
         }
-        let mut result = IrqResultMaxSizeTimeout::default();
+        let mut result = IrqResultMaxSizeOrTimeout::default();
 
         let irq_end = self.uart().irq_end().read();
         let enb_status = self.uart().enable().read();
@@ -1006,46 +1008,51 @@ impl<Uart: Instance> RxWithIrq<Uart> {
 
     fn read_handler(
         &self,
-        errors: &mut IrqUartError,
+        errors: &mut Option<IrqUartError>,
         read_res: &nb::Result<u8, RxError>,
     ) -> Option<u8> {
         match read_res {
             Ok(byte) => Some(*byte),
             Err(nb::Error::WouldBlock) => None,
             Err(nb::Error::Other(e)) => {
+                // Ensure `errors` is Some(IrqUartError), initializing if it's None
+                let err = errors.get_or_insert(IrqUartError::default());
+
+                // Now we can safely modify fields inside `err`
                 match e {
-                    RxError::Overrun => {
-                        errors.overflow = true;
-                    }
-                    RxError::Framing => {
-                        errors.framing = true;
-                    }
-                    RxError::Parity => {
-                        errors.parity = true;
-                    }
+                    RxError::Overrun => err.overflow = true,
+                    RxError::Framing => err.framing = true,
+                    RxError::Parity => err.parity = true,
                 }
                 None
             }
         }
     }
 
-    fn check_for_errors(&self, errors: &mut IrqUartError) {
-        // Read status register again, might have changed since reading received data
+    fn check_for_errors(&self, errors: &mut Option<IrqUartError>) {
         let rx_status = self.uart().rxstatus().read();
+
+        if rx_status.rxovr().bit_is_set()
+            || rx_status.rxfrm().bit_is_set()
+            || rx_status.rxpar().bit_is_set()
+        {
+            let err = errors.get_or_insert(IrqUartError::default());
+
             if rx_status.rxovr().bit_is_set() {
-            errors.overflow = true;
+                err.overflow = true;
             }
             if rx_status.rxfrm().bit_is_set() {
-            errors.framing = true;
+                err.framing = true;
             }
             if rx_status.rxpar().bit_is_set() {
-            errors.parity = true;
+                err.parity = true;
+            }
         }
     }
 
     fn irq_completion_handler_max_size_timeout(
         &mut self,
-        res: &mut IrqResultMaxSizeTimeout,
+        res: &mut IrqResultMaxSizeOrTimeout,
         context: &mut IrqContextTimeoutOrMaxSize,
     ) {
         self.disable_rx_irq_sources();