Adds sample rust program

bench/programs_rust/fpga-lib/src/interface.rs

@@ -0,0 +1,28 @@
+pub struct Buttons {}
+
+impl Buttons
+{
+    pub unsafe fn get_button(button_id: u8) -> bool
+    {
+        unsafe { *LED_IP_ADDRESS >> (button_id) & 0b1 == 0b1 }
+    }
+}
+
+pub struct Leds {}
+
+impl Leds
+{
+    pub unsafe fn set_led(led_id: u8, state: bool)
+    {
+        if state
+        {
+            unsafe { *LED_IP_ADDRESS |= (state as u32) << (led_id + 4) }
+        }
+        else
+        {
+            unsafe { *LED_IP_ADDRESS &= !((state as u32) << (led_id + 4)) }
+        }
+    }
+}
+
+pub const LED_IP_ADDRESS: *mut u32 = 0x30000000 as *mut u32;