Add enum_u8 macro to simplify enum conversion

We need several enums that map to a u8 value.  This patch adds the
enum_u8 macro that automatically derives the From and TryFrom macros for
an enum to make these conversions easier.

As TryFrom is not stable yet, we add our own TryFrom trait.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/main.rs b/src/main.rs
index b0ecafd..3857967 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -6,6 +6,9 @@
 
 extern crate panic_halt;
 
+#[macro_use]
+mod util;
+
 mod device;
 mod hid;