Read second set of buttons

lwcpu/src/lib.rs

@@ -163,7 +163,11 @@ impl Buttons {
     pub const UP    : u8 = 0b10000000;
 
     #[inline]
-    pub fn read() -> u8 {
+    pub fn read1() -> u8 {
         return unsafe { read_volatile(BUTTONS_POINTER) };
     }
+    #[inline]
+    pub fn read2() -> u8 {
+        return unsafe { read_volatile(BUTTONS_POINTER.byte_offset(3)) };
+    }
 }