lcd

card10/src/lcd.rs

+#[link(name = "card10")]
+extern {
+    fn LCD_SetBacklight(brightness: usize);
+    fn LCD_Clear(color: usize);
+    fn LCD_ClearWindow(xstart: usize, ystart: usize, xend: usize, yend: usize, color: usize);
+    fn LCD_SetWindowColor(xstart: usize, ystart: usize, xend: usize, yend: usize, color: usize);
+    fn LCD_SetUWORD(x: usize, y: usize, color: usize);
+    fn LCD_Update();
+}
+
+pub const W: usize = 160;
+pub const H: usize = 80;
+
+pub fn set_backlight(brightness: usize) {
+    unsafe {
+        LCD_SetBacklight(brightness);
+    }
+}
+
+pub fn put_pixel(x: usize, y: usize, color: usize) {
+    unsafe {
+        LCD_SetUWORD(x, y, color);
+    }
+}
+
+pub fn update() {
+    unsafe {
+        LCD_Update();
+    }
+}

card10/src/lib.rs

@@ -4,6 +4,8 @@ pub use max32665;
 pub use cortex_m_rt as _;
 pub use cortex_m_rt::entry;
 
+pub mod lcd;
+
 #[link(name = "card10")]
 extern {
     fn card10_init();

watchapp/src/main.rs

@@ -2,12 +2,27 @@
 #![no_main]
 
 use panic_abort as _;
-use card10::entry;
+use card10::{entry, lcd};
 
 
 #[entry]
 fn main() -> ! {
     card10::init();
 
-    panic!("TODO");
+    lcd::set_backlight(1000);
+    let mut t = 0;
+    loop {
+        for x in 0..lcd::W {
+            for y in 0..lcd::H {
+                if (((x - 2 * t) / 8) + ((y + t) / 8)) % 2 == 0 {
+                    lcd::put_pixel(x, y, 0);
+                } else {
+                    lcd::put_pixel(x, y, 0xffff);
+                }
+            }
+        }
+        lcd::update();
+
+        t += 1;
+    }
 }