Fix some build issues

Signed-off-by: Slendi <slendi@socopon.com>

src/main.rs

@@ -170,18 +170,23 @@ struct SingerApp {
     tx: Sender<SerialCommand>,
     rx: Receiver<SerialStatus>,
     connected: Option<String>,
+    font: Font,
 }
 
 impl SingerApp {
-    pub fn new() -> Self {
+    pub fn new(gfx: &mut Graphics) -> Self {
         let (tx_cmd, rx_cmd) = mpsc::channel();
         let (tx_status, rx_status) = mpsc::channel();
         Self::spawn_serial_worker(rx_cmd, tx_status);
+        let font = gfx
+            .create_font(include_bytes!("assets/Ubuntu-B.ttf"))
+            .expect("failed to load embedded font");
         Self {
             song_state: None,
             tx: tx_cmd,
             rx: rx_status,
             connected: None,
+            font,
         }
     }
 
@@ -261,12 +266,21 @@ impl SingerApp {
         };
         draw.rect((14.0, 14.0), (20.0, 20.0)).color(status_color);
 
+        let status_text = match &self.connected {
+            Some(name) => format!("Serial connected: {name}"),
+            None => "Serial disconnected".to_string(),
+        };
+        draw.text(&self.font, &status_text)
+            .position(44.0, 30.0)
+            .size(22.0)
+            .color(Color::BLACK);
+
         gfx.render(&draw);
     }
 }
 
-fn setup(_gfx: &mut Graphics) -> SingerApp {
-    SingerApp::new()
+fn setup(gfx: &mut Graphics) -> SingerApp {
+    SingerApp::new(gfx)
 }
 
 fn update(_app: &mut notan::app::App, state: &mut SingerApp) {