I can haz Lua?

driver/src/lib.rs

@@ -24,7 +24,7 @@ pub const G13_LCD_BUF_SIZE: i32 = (G13_LCD_ROWS + 5) * G13_LCD_BYTES_PER_ROW;
 #[derive(Clone)]
 pub struct G13 {
     interface: Interface,
-    img_buffer: [u8; G13_LCD_BUF_SIZE as usize + 8],
+    img_buffer: Arc<RwLock<[u8; G13_LCD_BUF_SIZE as usize + 8]>>,
     state: Arc<RwLock<State>>,
 }
 
@@ -107,7 +107,7 @@ impl G13 {
 
         Ok(Self {
             interface,
-            img_buffer,
+            img_buffer: Arc::new(RwLock::new(img_buffer)),
             state: Arc::new(RwLock::new(Default::default())),
         })
     }
@@ -191,9 +191,11 @@ impl G13 {
     }
 
     pub fn render(&mut self) -> Result<(), Box<dyn std::error::Error>> {
+        let img_buffer = self.img_buffer.read().expect("Poisoned");
+
         let mut buffer = [0u8; G13_LCD_BUF_SIZE as usize + 32 + 8];
         buffer[0] = 0x03;
-        buffer[32..G13_LCD_BUF_SIZE as usize + 32 + 8].copy_from_slice(&self.img_buffer);
+        buffer[32..G13_LCD_BUF_SIZE as usize + 32 + 8].copy_from_slice(&(*img_buffer));
 
         let mut w = self.interface.endpoint::<Interrupt, Out>(0x02)?.writer(64);
         w.write_all(&buffer)?;
@@ -219,6 +221,7 @@ impl DrawTarget for G13 {
     where
         I: IntoIterator<Item = embedded_graphics_core::Pixel<Self::Color>>,
     {
+        let mut img_buffer = self.img_buffer.write().expect("Poisoned");
         for p in pixels {
             if p.0.x < 0 || p.0.x > G13_LCD_COLUMNS - 1 || p.0.y < 0 || p.0.y > G13_LCD_ROWS - 1 {
                 continue;
@@ -228,9 +231,9 @@ impl DrawTarget for G13 {
             let mask = 1 << (p.0.y.rem_euclid(8));
 
             if p.1.is_on() {
-                self.img_buffer[offset as usize] |= mask;
+                img_buffer[offset as usize] |= mask;
             } else {
-                self.img_buffer[offset as usize] &= !mask;
+                img_buffer[offset as usize] &= !mask;
             }
         }