Minor fixes

Author: korken89

examples/rtic_frame_serial_dma.rs

@@ -36,7 +36,6 @@ pool!(
 #[app(device = stm32l4xx_hal::stm32, peripherals = true)]
 const APP: () = {
     struct Resources {
-        rx: serial::Rx<hal::stm32::USART2>,
         frame_reader: FrameReader<Box<SerialDMAPool>, RxDma<Rx<USART2>, dma::dma1::C6>, 8>,
         frame_sender: FrameSender<Box<SerialDMAPool>, TxDma<Tx<USART2>, dma::dma1::C7>, 8>,
     }
@@ -108,7 +107,7 @@ const APP: () = {
     /// This task handles the character match interrupt at required by the `FrameReader`
     ///
     /// It will echo the buffer back to the serial.
-    #[task(binds = USART2, resources = [rx, frame_reader, frame_sender], priority = 3)]
+    #[task(binds = USART2, resources = [frame_reader, frame_sender], priority = 3)]
     fn serial_isr(cx: serial_isr::Context) {
         // Check for character match
         if cx.resources.frame_reader.check_character_match(true) {
@@ -125,7 +124,7 @@ const APP: () = {
     /// This task handles the RX transfer complete interrupt at required by the `FrameReader`
     ///
     /// In this case we are discarding if a frame gets full as no character match was received
-    #[task(binds = DMA1_CH6, resources = [rx, frame_reader], priority = 3)]
+    #[task(binds = DMA1_CH6, resources = [frame_reader], priority = 3)]
     fn serial_rx_dma_isr(cx: serial_rx_dma_isr::Context) {
         if let Some(dma_buf) = SerialDMAPool::alloc() {
             let dma_buf = dma_buf.init(DMAFrame::new());

src/dma.rs

@@ -67,6 +67,7 @@ where
 
 impl<BUFFER, PAYLOAD, CHANNEL, const N: usize> FrameReader<BUFFER, RxDma<PAYLOAD, CHANNEL>, N>
 where
+    BUFFER: Sized + StableDeref<Target = DMAFrame<N>> + DerefMut + 'static,
     PAYLOAD: CharacterMatch,
 {
     /// Checks to see if the peripheral has detected a character match and
@@ -394,7 +395,7 @@ macro_rules! dma {
                 use core::ptr;
                 use stable_deref_trait::StableDeref;
 
-                use crate::dma::{CircBuffer, FrameReader, CharacterMatch, FrameSender, DMAFrame, DmaExt, Error, Event, Half, Transfer, W, R, RxDma, TxDma, TransferPayload};
+                use crate::dma::{CircBuffer, FrameReader, FrameSender, DMAFrame, DmaExt, Error, Event, Half, Transfer, W, R, RxDma, TxDma, TransferPayload};
                 use crate::rcc::AHB1;
 
                 #[allow(clippy::manual_non_exhaustive)]