[dev] lots of progress

Create main timer loop using an auxilliary thread.

src/device/device.rs

@@ -0,0 +1,81 @@
+use std::ops::SubAssign;
+use std::sync::atomic::{AtomicU16, Ordering};
+use std::sync::{Arc, Mutex, RwLock};
+use std::thread::{JoinHandle, sleep};
+use std::time::Duration;
+use crate::device::timer::Timer;
+
+
+pub struct Device {
+    pub registers: RegisterFile,
+    pub memory: Box<[u8; Self::DEVICE_MEMORY_SIZE]>,
+    pub timer: Timer,
+    pub stack: Vec<u16>
+}
+
+impl Device {
+    pub const DEVICE_MEMORY_SIZE: usize = 2 << 12;
+    pub fn new(timer: Timer) -> Device {
+        let memory = vec![0u8; Self::DEVICE_MEMORY_SIZE].into_boxed_slice().try_into().unwrap();
+        log::trace!("Successfully initiated device memory");
+        Device {
+            registers: RegisterFile::new(),
+            memory,
+            stack:Vec::with_capacity(16),
+            timer,
+        }
+    }
+}
+impl Device{
+    const DEFAULT_FONT:[u8;5*16] = [
+        0xF0, 0x90, 0x90, 0x90, 0xF0, // 0
+        0x20, 0x60, 0x20, 0x20, 0x70, // 1
+        0xF0, 0x10, 0xF0, 0x80, 0xF0, // 2
+        0xF0, 0x10, 0xF0, 0x10, 0xF0, // 3
+        0x90, 0x90, 0xF0, 0x10, 0x10, // 4
+        0xF0, 0x80, 0xF0, 0x10, 0xF0, // 5
+        0xF0, 0x80, 0xF0, 0x90, 0xF0, // 6
+        0xF0, 0x10, 0x20, 0x40, 0x40, // 7
+        0xF0, 0x90, 0xF0, 0x90, 0xF0, // 8
+        0xF0, 0x90, 0xF0, 0x10, 0xF0, // 9
+        0xF0, 0x90, 0xF0, 0x90, 0x90, // A
+        0xE0, 0x90, 0xE0, 0x90, 0xE0, // B
+        0xF0, 0x80, 0x80, 0x80, 0xF0, // C
+        0xE0, 0x90, 0x90, 0x90, 0xE0, // D
+        0xF0, 0x80, 0xF0, 0x80, 0xF0, // E
+        0xF0, 0x80, 0xF0, 0x80, 0x80  // F
+    ];
+    const FONT_DEFAULT_MEM_LOCATION_START:usize = 0x50;
+    const FONT_DEFAULT_MEM_LOCATION_END:usize = 0x9F;
+    pub fn cycle(&mut self){
+
+    }
+
+    pub fn set_default_font(&mut self){
+        self.memory[Self::FONT_DEFAULT_MEM_LOCATION_START..=Self::FONT_DEFAULT_MEM_LOCATION_END].copy_from_slice(&Self::DEFAULT_FONT);
+    }
+
+}
+impl Drop for Device{
+    fn drop(&mut self) {
+        self.timer.send_stop_signal()
+    }
+}
+
+pub struct RegisterFile {
+    pub v: [u8; 0x10],
+    // program counter - only u12 technically.
+    pub pc: u16,
+    /// stack pointer
+    pub i: u16,
+}
+
+impl RegisterFile {
+    pub fn new() -> RegisterFile {
+        RegisterFile {
+            v: [0; 0x10],
+            pc: 0x200,
+            i: 0,
+        }
+    }
+}