Update README

2 files changed, 17 insertions, 1 deletions

diff --git a/README.md b/README.md
index 3943a52..3ef9ee8 100644
--- a/README.md
+++ b/README.md
@@ -79,6 +79,22 @@ brew install gcc-arm-none-eabi
 make
 ```
 
+## Using Linux
+
+Install a compatible arm-none-eabi-gcc compiler from your distribution package
+manager. Make sure to initialize the submodules of this git repository after
+cloning.
+
+```
+git submodule init
+git submodule update
+make
+```
+
+You can use `make run` to upload the firmware to the Launchpad Pro using
+`amidi`. Make sure to update or pass the Makefile `PORT` variable with your
+Launchpad's ID, obtained using `amidi -l`.
+
 # Uploading to a Launchpad Pro
 Now you've got some nice new code to run! To upload it to your Launchpad Pro, you'll need a sysex tool for your host platform (I'd love to get it working from the virtual machine, but that's for later).  I recommend [Sysex Librarian](http://www.snoize.com/SysExLibrarian/) on macOS, and [MIDI OX](http://www.midiox.com/) on Windows.  On Linux, I'll bet you already have a tool in mind.
 
diff --git a/src/app.c b/src/app.c
index aeb5c84..aacc68f 100644
--- a/src/app.c
+++ b/src/app.c
@@ -198,7 +198,7 @@ typedef struct State {
     u8 ch_min;
     u8 ch_max;
     u8 ch_listen[16];
-    u8 mode;
+    Mode mode;
 } State;
 
 // Globals.