Add missing serial hci examples (#291)

* Added ble_bas_central example.
* Added l2cap examples for the serial-hic.
* Added a simple readme to the serial-hic example.

.gitignore

@@ -1,3 +1,4 @@
 **/target
 **/target_ci
-Cargo.lock
+Cargo.lock
+.idea

examples/serial-hci/README.md

@@ -0,0 +1,4 @@
+# Serial HCI example
+
+These examples require two Bluetooth dongles with a Host Controller Interface (HCI).
+The examples have been tested with two nRF52840 dongles running the [HIC UART example](https://github.com/nrfconnect/sdk-zephyr/tree/main/samples/bluetooth/hci_uart).

examples/serial-hci/src/bin/ble_bas_central.rs

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+// Use with any serial HCI
+use bt_hci::controller::ExternalController;
+use bt_hci::transport::SerialTransport;
+use embassy_sync::blocking_mutex::raw::NoopRawMutex;
+use log::*;
+use tokio::time::Duration;
+use tokio_serial::{DataBits, Parity, SerialStream, StopBits};
+use trouble_example_apps::ble_bas_central;
+
+#[tokio::main]
+async fn main() {
+    env_logger::builder()
+        .filter_level(log::LevelFilter::Trace)
+        .format_timestamp_nanos()
+        .init();
+
+    let baudrate = 1000000;
+
+    if std::env::args().len() != 2 {
+        println!("Provide the serial port as the one and only command line argument.");
+        return;
+    }
+
+    let args: Vec<String> = std::env::args().collect();
+
+    let mut port = SerialStream::open(
+        &tokio_serial::new(args[1].as_str(), baudrate)
+            .baud_rate(baudrate)
+            .data_bits(DataBits::Eight)
+            .parity(Parity::None)
+            .stop_bits(StopBits::One),
+    )
+    .unwrap();
+
+    // Drain input
+    tokio::time::sleep(Duration::from_secs(1)).await;
+    loop {
+        let mut buf = [0; 1];
+        match port.try_read(&mut buf[..]) {
+            Err(e) if e.kind() == std::io::ErrorKind::WouldBlock => break,
+            _ => {}
+        }
+    }
+    info!("Ready!");
+
+    let (reader, writer) = tokio::io::split(port);
+
+    let reader = embedded_io_adapters::tokio_1::FromTokio::new(reader);
+    let writer = embedded_io_adapters::tokio_1::FromTokio::new(writer);
+
+    let driver: SerialTransport<NoopRawMutex, _, _> = SerialTransport::new(reader, writer);
+    let controller: ExternalController<_, 10> = ExternalController::new(driver);
+
+    ble_bas_central::run::<_, 128>(controller).await;
+}

examples/serial-hci/src/bin/ble_l2cap_central.rs

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+// Use with any serial HCI
+use bt_hci::controller::ExternalController;
+use bt_hci::transport::SerialTransport;
+use embassy_sync::blocking_mutex::raw::NoopRawMutex;
+use log::*;
+use tokio::time::Duration;
+use tokio_serial::{DataBits, Parity, SerialStream, StopBits};
+use trouble_example_apps::ble_l2cap_central;
+
+#[tokio::main]
+async fn main() {
+    env_logger::builder()
+        .filter_level(log::LevelFilter::Trace)
+        .format_timestamp_nanos()
+        .init();
+
+    let baudrate = 1000000;
+
+    if std::env::args().len() != 2 {
+        println!("Provide the serial port as the one and only command line argument.");
+        return;
+    }
+
+    let args: Vec<String> = std::env::args().collect();
+
+    let mut port = SerialStream::open(
+        &tokio_serial::new(args[1].as_str(), baudrate)
+            .baud_rate(baudrate)
+            .data_bits(DataBits::Eight)
+            .parity(Parity::None)
+            .stop_bits(StopBits::One),
+    )
+    .unwrap();
+
+    // Drain input
+    tokio::time::sleep(Duration::from_secs(1)).await;
+    loop {
+        let mut buf = [0; 1];
+        match port.try_read(&mut buf[..]) {
+            Err(e) if e.kind() == std::io::ErrorKind::WouldBlock => break,
+            _ => {}
+        }
+    }
+    info!("Ready!");
+
+    let (reader, writer) = tokio::io::split(port);
+
+    let reader = embedded_io_adapters::tokio_1::FromTokio::new(reader);
+    let writer = embedded_io_adapters::tokio_1::FromTokio::new(writer);
+
+    let driver: SerialTransport<NoopRawMutex, _, _> = SerialTransport::new(reader, writer);
+    let controller: ExternalController<_, 10> = ExternalController::new(driver);
+
+    ble_l2cap_central::run::<_, 128>(controller).await;
+}

examples/serial-hci/src/bin/ble_l2cap_peripheral.rs

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+// Use with any serial HCI
+use bt_hci::controller::ExternalController;
+use bt_hci::transport::SerialTransport;
+use embassy_sync::blocking_mutex::raw::NoopRawMutex;
+use log::*;
+use tokio::time::Duration;
+use tokio_serial::{DataBits, Parity, SerialStream, StopBits};
+use trouble_example_apps::ble_l2cap_peripheral;
+
+#[tokio::main]
+async fn main() {
+    env_logger::builder()
+        .filter_level(log::LevelFilter::Trace)
+        .format_timestamp_nanos()
+        .init();
+
+    let baudrate = 1000000;
+
+    if std::env::args().len() != 2 {
+        println!("Provide the serial port as the one and only command line argument.");
+        return;
+    }
+
+    let args: Vec<String> = std::env::args().collect();
+
+    let mut port = SerialStream::open(
+        &tokio_serial::new(args[1].as_str(), baudrate)
+            .baud_rate(baudrate)
+            .data_bits(DataBits::Eight)
+            .parity(Parity::None)
+            .stop_bits(StopBits::One),
+    )
+    .unwrap();
+
+    // Drain input
+    tokio::time::sleep(Duration::from_secs(1)).await;
+    loop {
+        let mut buf = [0; 1];
+        match port.try_read(&mut buf[..]) {
+            Err(e) if e.kind() == std::io::ErrorKind::WouldBlock => break,
+            _ => {}
+        }
+    }
+    info!("Ready!");
+
+    let (reader, writer) = tokio::io::split(port);
+
+    let reader = embedded_io_adapters::tokio_1::FromTokio::new(reader);
+    let writer = embedded_io_adapters::tokio_1::FromTokio::new(writer);
+
+    let driver: SerialTransport<NoopRawMutex, _, _> = SerialTransport::new(reader, writer);
+    let controller: ExternalController<_, 10> = ExternalController::new(driver);
+
+    ble_l2cap_peripheral::run::<_, 128>(controller).await;
+}