Fix some long-standing errors and inconsistencies for USARTS

Author: jessebraham

src/serial.rs

@@ -116,18 +116,23 @@ macro_rules! usart_pins {
 
 #[cfg(any(
     feature = "stm32f030",
+    feature = "stm32f031",
+    feature = "stm32f038",
     feature = "stm32f042",
     feature = "stm32f048",
     feature = "stm32f051",
     feature = "stm32f058",
+    feature = "stm32f070",
     feature = "stm32f071",
+    feature = "stm32f072",
     feature = "stm32f078",
+    feature = "stm32f091",
     feature = "stm32f098",
 ))]
 usart_pins! {
-    USART1 =>  {
+    USART1 => {
         tx => [gpioa::PA9<Alternate<AF1>>, gpiob::PB6<Alternate<AF0>>],
-        rx => [gpioa::PA10<Alternate<AF1>>, gpiob::PB6<Alternate<AF0>>],
+        rx => [gpioa::PA10<Alternate<AF1>>, gpiob::PB7<Alternate<AF0>>],
     }
 }
 #[cfg(any(feature = "stm32f030x6", feature = "stm32f031", feature = "stm32f038"))]
@@ -137,19 +142,6 @@ usart_pins! {
         rx => [gpioa::PA3<Alternate<AF1>>, gpioa::PA15<Alternate<AF1>>],
     }
 }
-#[cfg(any(
-    feature = "stm32f031",
-    feature = "stm32f038",
-    feature = "stm32f070",
-    feature = "stm32f072",
-    feature = "stm32f091",
-))]
-usart_pins! {
-    USART1 => {
-        tx => [gpioa::PA9<Alternate<AF1>>, gpiob::PB6<Alternate<AF0>>],
-        rx => [gpioa::PA10<Alternate<AF1>>, gpiob::PB7<Alternate<AF0>>],
-    }
-}
 
 #[cfg(any(
     feature = "stm32f030x8",