Add a backend for Silicon Labs CP2110/4 HID-to-UART bridge.

These two chips implement UART access via a HID protocol, which can be
implemented purely in user space. The protocol is documented by Silicon
Labs AN434:
https://www.silabs.com/documents/public/application-notes/AN434-CP2110-4-Interface-Specification.pdf

The backend is implemented based on cython-hidapi
(https://github.com/trezor/cython-hidapi), making it OS-independent, if a
bit awkward.

1 files changed, 3 insertions, 0 deletions

diff --git a/setup.py b/setup.py
index 6e8b586..ea53643 100644
--- a/setup.py
+++ b/setup.py
@@ -97,4 +97,7 @@ Latest:
     ],
     platforms='any',
     scripts=['serial/tools/miniterm.py'],
+    extras_require = {
+        'cp2110': ['hidapi'],
+    },
 )