Implement conversion traits for Model and NK_device_model

A nitrokey_sys::NK_device_model (= u32) value may correspond to a
nitrokey::Model, and vice versa.  This patch adds the appropriate From
and TryFrom implementations.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 059792d..0eb4f40 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -235,6 +235,7 @@ impl Manager {
     /// # Errors
     ///
     /// - [`NotConnected`][] if no Nitrokey device is connected
+    /// - [`UnsupportedModelError`][] if the Nitrokey device is not supported by this crate
     ///
     /// # Example
     ///
@@ -252,6 +253,7 @@ impl Manager {
     /// ```
     ///
     /// [`NotConnected`]: enum.CommunicationError.html#variant.NotConnected
+    /// [`UnsupportedModelError`]: enum.Error.html#variant.UnsupportedModelError
     pub fn connect(&mut self) -> Result<DeviceWrapper<'_>, Error> {
         if unsafe { nitrokey_sys::NK_login_auto() } == 1 {
             device::get_connected_device(self)