Add a basic UART (very much temporary, its performance is most likely horrible

src/main.rs

@@ -9,6 +9,7 @@ use std::{
     fs::File,
     io::{self, Read},
     sync::Arc,
+    time::Duration,
 };
 
 use trve::{
@@ -17,6 +18,8 @@ use trve::{
     mem::{DeviceEntry, MemAccessFault, MemConfig, MemDeviceInterface, PageNum, Ram},
 };
 
+use crate::basic_uart::BasicUart;
+
 fn read_file_to_buffer(path: &str, buffer: &mut [u8]) -> io::Result<usize> {
     let mut file = File::open(path)?;
     let mut total_read = 0;
@@ -42,14 +45,24 @@ fn main() -> Result<(), Box<dyn Error>> {
     let buf = ram.buf_mut();
     read_file_to_buffer("./img", buf)?;
 
+    let uart = BasicUart::new();
+    let uart = uart.spawn_poller(Duration::from_millis(10));
+
     let mem_cfg = MemConfig {
         ram: Arc::new(ram),
         ram_start: 0x8000_0000 / 4096,
-        devices: Box::new([DeviceEntry {
-            base: 0,
-            size: 1,
-            interface: Arc::new(DbgOut),
-        }]),
+        devices: Box::new([
+            DeviceEntry {
+                base: 0,
+                size: 1,
+                interface: Arc::new(DbgOut),
+            },
+            DeviceEntry {
+                base: 1,
+                size: 1,
+                interface: uart,
+            },
+        ]),
     };
 
     let mut core = Core::new(mem_cfg);
@@ -59,6 +72,8 @@ fn main() -> Result<(), Box<dyn Error>> {
     Ok(())
 }
 
+mod basic_uart;
+
 struct DbgOut;
 
 impl MemDeviceInterface for DbgOut {