new ui, control panel kinda works, display works, framebuffer works, serial write works. widget for registers works. next is serial input and the editor

dsa/emulator/src/io/serial.rs

@@ -0,0 +1,48 @@
+use std::{
+    path::Component,
+    sync::{
+        Arc,
+        mpsc::{Receiver, Sender},
+    },
+};
+
+use crate::{MemoryBank, SharedState, backend::memory::PhysAddr};
+
+pub struct Serial {
+    pub receiver: Receiver<u8>,
+    pub buffer: Vec<u8>,
+
+    pub visible: bool,
+}
+
+impl Serial {
+    fn uart_io_thread(mem: MemoryBank, uart_base: PhysAddr, tx: Sender<u8>) {
+        loop {
+            let word = mem.read_word(uart_base);
+            // println!("word {:#010X}", word);
+            if word >> 24 == 0x01 {
+                let byte = ((word >> 16) & 0xFF) as u8;
+                let _ = tx.send(byte);
+                mem.write_word(uart_base, 0x00_00_00_00); // clear valid flag
+            }
+            std::hint::spin_loop();
+        }
+    }
+
+    pub fn new(uart_base: PhysAddr, state: Arc<SharedState>, mem_handle: MemoryBank) -> Self {
+        let (sender, receiver) = std::sync::mpsc::channel();
+        let _ = std::thread::spawn(move || Self::uart_io_thread(mem_handle, uart_base, sender));
+
+        Self {
+            visible: false,
+            receiver,
+            buffer: Vec::new(),
+        }
+    }
+
+    pub fn update(&mut self) {
+        while let Ok(byte) = self.receiver.try_recv() {
+            self.buffer.push(byte);
+        }
+    }
+}