formatting...

Author: AdinAck

examples/serial_echo_irq.rs

@@ -5,20 +5,25 @@
 #![deny(unsafe_code)]
 #![allow(non_camel_case_types)]
 
-use panic_halt as _;
-use nb::block;
 use core::cell::RefCell;
+use nb::block;
+use panic_halt as _;
 
 use cortex_m::interrupt::Mutex;
 use cortex_m_rt::entry;
 
-use stm32f0xx_hal as hal;
 use hal::{
-    pac::{ self, interrupt, Interrupt, USART1 },
+    delay::Delay,
+    gpio::{
+        gpioa::{PA15, PA2},
+        gpiob::PB3,
+        Alternate, Output, PushPull, AF1,
+    },
+    pac::{self, interrupt, Interrupt, USART1},
     prelude::*,
-    serial::Serial, gpio::{gpioa::{PA2, PA15}, Alternate, AF1, Output, PushPull, gpiob::PB3},
-    delay::Delay
+    serial::Serial,
 };
+use stm32f0xx_hal as hal;
 
 // setup some types for our globally shared resources
 type LED_PIN = PB3<Output<PushPull>>;
@@ -57,13 +62,16 @@ macro_rules! with_global_mut {
 // a helper macro to generalize the initialization of a UART
 macro_rules! setup_uart {
     ( $CS:ident, $DP:ident, $RCC:ident, $GPIOx:ident ) => {
-        let (tx, rx) =
-            (
-                $GPIOx.pa2.into_alternate_af1($CS),
-                $GPIOx.pa15.into_alternate_af1($CS),
-            );
-
-        init_global!($CS, SER_PORT, Serial::usart1($DP.USART1, (tx, rx), 9_600.bps(), &mut $RCC));
+        let (tx, rx) = (
+            $GPIOx.pa2.into_alternate_af1($CS),
+            $GPIOx.pa15.into_alternate_af1($CS),
+        );
+
+        init_global!(
+            $CS,
+            SER_PORT,
+            Serial::usart1($DP.USART1, (tx, rx), 9_600.bps(), &mut $RCC)
+        );
         with_global_mut!($CS, SER_PORT, ser, {
             ser.listen(hal::serial::Event::Rxne);
         });
@@ -89,7 +97,9 @@ fn main() -> ! {
     });
 
     #[allow(unsafe_code)] // just this once ;)
-    unsafe { cortex_m::peripheral::NVIC::unmask(Interrupt::USART1); }
+    unsafe {
+        cortex_m::peripheral::NVIC::unmask(Interrupt::USART1);
+    }
 
     loop {
         cortex_m::interrupt::free(|cs| {
@@ -118,4 +128,4 @@ fn USART1() {
             }
         });
     });
-}
+}