Added missing line to enable interrupts

src/main.rs

@@ -54,6 +54,7 @@ fn main() -> Result<(), Error> {
     unsafe {
         interrupt_button_handle.subscribe(app_state_interrupt);
     }
+    interrupt_button_handle.enable_interrupt();
 
     // Prepare components for processing
     let mut gps: GPS = GPS::new(peripherals.uart0, gps_rx)?;