Get rid of some warnings

embassy-nrf-examples/src/bin/buffered_uart.rs

@@ -66,9 +66,7 @@ async fn run() {
 
         // Reverse buf
         for i in 0..4 {
-            let tmp = buf[i];
-            buf[i] = buf[7 - i];
-            buf[7 - i] = tmp;
+            buf.swap(i, 7 - i);
         }
 
         info!("writing...");

embassy-nrf-examples/src/bin/gpiote_channel.rs

@@ -12,7 +12,7 @@ use nrf52840_hal::gpio;
 
 use embassy::executor::{task, Executor};
 use embassy::util::Forever;
-use embassy_nrf::gpiote::{Channels, Gpiote, InputChannel, InputChannelPolarity};
+use embassy_nrf::gpiote::{Gpiote, InputChannel, InputChannelPolarity};
 use embassy_nrf::interrupt;
 
 #[task]

embassy-nrf-examples/src/bin/gpiote_port.rs

@@ -6,7 +6,6 @@
 mod example_common;
 use example_common::*;
 
-use core::mem;
 use core::pin::Pin;
 use cortex_m_rt::entry;
 use defmt::panic;

embassy-nrf-examples/src/bin/multiprio.rs

@@ -61,7 +61,6 @@
 mod example_common;
 use example_common::*;
 
-use cortex_m::peripheral::NVIC;
 use cortex_m_rt::entry;
 use defmt::panic;
 use nrf52840_hal::clocks;

embassy-nrf-examples/src/bin/qspi.rs

@@ -7,7 +7,7 @@ mod example_common;
 use example_common::*;
 
 use cortex_m_rt::entry;
-use defmt::{assert_eq, panic, *};
+use defmt::{assert_eq, panic};
 use nrf52840_hal::gpio;
 
 use embassy::executor::{task, Executor};

embassy-nrf-examples/src/bin/rtc_async.rs

@@ -6,11 +6,10 @@
 mod example_common;
 use example_common::*;
 
-use core::mem::MaybeUninit;
 use cortex_m_rt::entry;
 use defmt::panic;
 use embassy::executor::{task, Executor};
-use embassy::time::{Clock, Duration, Timer};
+use embassy::time::{Duration, Timer};
 use embassy::util::Forever;
 use embassy_nrf::pac;
 use embassy_nrf::{interrupt, rtc};

embassy-nrf-examples/src/bin/uart.rs

@@ -75,7 +75,7 @@ async fn run(uart: pac::UARTE0, port: pac::P0) {
         };
         let received = &mut buf[..received_len];
 
-        if received.len() > 0 {
+        if !received.is_empty() {
             info!("read done, got {:[u8]}", received);
 
             // Echo back received data