1 files changed, 4 insertions, 0 deletions
diff --git a/src/lib.rs b/src/lib.rs
index 00ffd72..f49fd98 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -53,6 +53,7 @@
 //TODO #![deny(warnings)]
 #![no_std]
 
+extern crate nb;
 extern crate embedded_hal as hal;
 use core::marker::PhantomData;
 
@@ -133,6 +134,9 @@ struct BitFlags;
 impl BitFlags {
     const OP_MODE      : u16 = 0b0000_0001_0000_0000;
     const OS           : u16 = 0b1000_0000_0000_0000;
+    const DR2          : u16 = 0b0000_0000_1000_0000;
+    const DR1          : u16 = 0b0000_0000_0100_0000;
+    const DR0          : u16 = 0b0000_0000_0010_0000;
 }