Bump stm32f4xx-hal in /examples/stm32f4-event-printer

Due to the refactorings of the stream APIs the code had to be adapted
(the transfer flag is now part of the transfer).

Bumps [stm32f4xx-hal](https://github.com/stm32-rs/stm32f4xx-hal) from 0.17.1 to 0.18.0.
- [Release notes](https://github.com/stm32-rs/stm32f4xx-hal/releases)
- [Changelog](https://github.com/stm32-rs/stm32f4xx-hal/blob/master/CHANGELOG.md)
- [Commits](stm32-rs/stm32f4xx-hal@v0.17.1...v0.18.0)

---
updated-dependencies:
- dependency-name: stm32f4xx-hal
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Co-Authored-By: Ralph Ursprung <[email protected]>
Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

examples/stm32f4-event-printer/Cargo.lock

@@ -9,7 +9,7 @@ cortex-m = { version = "0.7", features = ["critical-section-single-core"]}
 cortex-m-rtic = "1.1.4"
 panic-probe = { version = "0.3", features = ["print-defmt"] }
 
-stm32f4xx-hal = { version = "0.17", features = ["stm32f401", "rtic", "rtic-monotonic"] }
+stm32f4xx-hal = { version = "0.18", features = ["stm32f401", "rtic", "rtic-monotonic"] }
 
 fugit = "0.3"
 

examples/stm32f4-event-printer/Cargo.toml

@@ -71,6 +71,10 @@ impl BluefruitLEUARTFriend {
     }
 
     pub fn handle_bluetooth_message(&mut self) {
+        if !self.rx_transfer.is_transfer_complete() {
+            return;
+        }
+
         let (filled_buffer, _) = self
             .rx_transfer
             .next_transfer(self.rx_buffer.take().unwrap())

examples/stm32f4-event-printer/src/adafruit_bluefruit_le_uart_friend.rs

@@ -15,11 +15,7 @@ mod adafruit_bluefruit_le_uart_friend;
 #[rtic::app(device = stm32f4xx_hal::pac, dispatchers = [EXTI1])]
 mod app {
     use crate::adafruit_bluefruit_le_uart_friend::BluefruitLEUARTFriend;
-    use stm32f4xx_hal::dma::Stream2;
-    use stm32f4xx_hal::{
-        dma::traits::StreamISR, pac, pac::DMA2, prelude::*, timer::MonoTimerUs,
-        watchdog::IndependentWatchdog,
-    };
+    use stm32f4xx_hal::{pac, prelude::*, timer::MonoTimerUs, watchdog::IndependentWatchdog};
 
     #[monotonic(binds = TIM2, default = true)]
     type MicrosecMono = MonoTimerUs<pac::TIM2>;
@@ -77,11 +73,9 @@ mod app {
     #[task(binds = DMA2_STREAM2, shared = [bt_module])]
     fn bluetooth_dma_interrupt(mut ctx: bluetooth_dma_interrupt::Context) {
         defmt::debug!("received DMA2_STREAM2 interrupt (transfer complete)");
-        if Stream2::<DMA2>::get_transfer_complete_flag() {
-            ctx.shared.bt_module.lock(|bt_module| {
-                bt_module.handle_bluetooth_message();
-            });
-        }
+        ctx.shared.bt_module.lock(|bt_module| {
+            bt_module.handle_bluetooth_message();
+        });
     }
 
     #[task(binds = USART1, shared = [bt_module])]