Enable DMA for USART on STM32F302 devices (#139)

authored-by: sprhawk <465558+sprhawk@users.noreply.github.com>

Author: teskje

CHANGELOG.md

@@ -13,6 +13,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - SPI support for reclock after initialization ([#98](https://github.com/stm32-rs/stm32f3xx-hal/pull/98))
 - Support for `stm32f302x6` and `stm32f302x8` devices ([#132](https://github.com/stm32-rs/stm32f3xx-hal/pull/132))
 - Support for the onboard real-time clock (RTC) ([#136](https://github.com/stm32-rs/stm32f3xx-hal/pull/136))
+- Enable DMA for USART on `stm32f302` devices ([#139](https://github.com/stm32-rs/stm32f3xx-hal/pull/139))
 
 ## [v0.5.0] - 2020-07-21
 

src/dma.rs

@@ -494,10 +494,14 @@ dma!(
 );
 
 #[cfg(any(
+    feature = "stm32f302xb",
+    feature = "stm32f302xc",
+    feature = "stm32f302xd",
+    feature = "stm32f302xe",
     feature = "stm32f303xb",
     feature = "stm32f303xc",
     feature = "stm32f303xd",
-    feature = "stm32f303xe"
+    feature = "stm32f303xe",
 ))]
 dma!(
     DMA2, dma2, dma2en,
@@ -527,7 +531,6 @@ macro_rules! on_channel {
     };
 }
 
-#[cfg(feature = "stm32f303")]
 on_channel!(dma1,
     serial::Rx<pac::USART1> => C5,
     serial::Tx<pac::USART1> => C4,

src/lib.rs

@@ -116,7 +116,7 @@ pub use crate::pac::interrupt;
 pub mod adc;
 #[cfg(feature = "device-selected")]
 pub mod delay;
-#[cfg(feature = "stm32f303")]
+#[cfg(any(feature = "stm32f302", feature = "stm32f303"))]
 pub mod dma;
 #[cfg(feature = "device-selected")]
 pub mod flash;

src/prelude.rs

@@ -1,6 +1,6 @@
 //! Prelude
 
-#[cfg(feature = "stm32f303")]
+#[cfg(any(feature = "stm32f302", feature = "stm32f303"))]
 pub use crate::dma::DmaExt as _stm32f3xx_hal_dma_DmaExt;
 pub use crate::flash::FlashExt as _stm32f3xx_hal_flash_FlashExt;
 pub use crate::gpio::GpioExt as _stm32f3xx_hal_gpio_GpioExt;

src/serial.rs

@@ -37,9 +37,9 @@ use crate::gpio::gpiod;
 ))]
 use crate::gpio::gpioe;
 
-#[cfg(feature = "stm32f303")]
+#[cfg(any(feature = "stm32f302", feature = "stm32f303"))]
 use crate::dma;
-#[cfg(feature = "stm32f303")]
+#[cfg(any(feature = "stm32f302", feature = "stm32f303"))]
 use cortex_m::interrupt;
 
 /// Interrupt event
@@ -363,7 +363,7 @@ macro_rules! hal {
 
             impl blocking::serial::write::Default<u8> for Tx<$USARTX> {}
 
-            #[cfg(feature = "stm32f303")]
+            #[cfg(any(feature = "stm32f302", feature = "stm32f303"))]
             impl Rx<$USARTX> {
                 /// Fill the buffer with received data using DMA.
                 pub fn read_exact<B, C>(
@@ -384,7 +384,7 @@ macro_rules! hal {
                 }
             }
 
-            #[cfg(feature = "stm32f303")]
+            #[cfg(any(feature = "stm32f302", feature = "stm32f303"))]
             impl Tx<$USARTX> {
                 /// Transmit all data in the buffer using DMA.
                 pub fn write_all<B, C>(
@@ -405,7 +405,7 @@ macro_rules! hal {
                 }
             }
 
-            #[cfg(feature = "stm32f303")]
+            #[cfg(any(feature = "stm32f302", feature = "stm32f303"))]
             impl dma::Target for Rx<$USARTX> {
                 fn enable_dma(&mut self) {
                     // NOTE(unsafe) critical section prevents races
@@ -424,7 +424,7 @@ macro_rules! hal {
                 }
             }
 
-            #[cfg(feature = "stm32f303")]
+            #[cfg(any(feature = "stm32f302", feature = "stm32f303"))]
             impl dma::Target for Tx<$USARTX> {
                 fn enable_dma(&mut self) {
                     // NOTE(unsafe) critical section prevents races
@@ -446,24 +446,8 @@ macro_rules! hal {
     }
 }
 
-#[cfg(any(
-    feature = "stm32f301",
-    feature = "stm32f318",
-    feature = "stm32f303",
-    feature = "stm32f373",
-    feature = "stm32f378",
-    feature = "stm32f328",
-    feature = "stm32f358",
-    feature = "stm32f398"
-))]
 hal! {
     USART1: (usart1, APB2, usart1en, usart1rst, pclk2),
     USART2: (usart2, APB1, usart2en, usart2rst, pclk1),
     USART3: (usart3, APB1, usart3en, usart3rst, pclk1),
 }
-
-#[cfg(any(feature = "stm32f302", feature = "stm32f334"))]
-hal! {
-    USART1: (usart1, APB2, usart1en, usart1rst, pclk2),
-    USART2: (usart2, APB1, usart2en, usart2rst, pclk1),
-}