Add 'pub' where necessary to build a binary with this crate.

src/action.rs

@@ -2,7 +2,7 @@ use matrix::Matrix;
 use state::KeyState;
 
 const MAX_PACKET_SIZE: usize = 6;
-struct USBBuffer {
+pub struct USBBuffer {
   data: [u32; MAX_PACKET_SIZE],
   count: usize,
 }
@@ -20,11 +20,11 @@ impl USBBuffer {
   }
 }
 
-trait Layout {
+pub trait Layout {
   fn process_action(&self, row: usize, col: usize, state: KeyState, buf: &mut USBBuffer);
 }
 
-fn process_actions<SM: Matrix<KeyState>, L: Layout>(states: SM, layout: &L) -> USBBuffer {
+pub fn process_actions<SM: Matrix<KeyState>, L: Layout>(states: SM, layout: &L) -> USBBuffer {
   let mut buf = USBBuffer::new();
   for c in 0..states.get_num_columns() {
     for r in 0..states.get_num_rows() {

src/lib.rs

@@ -1,8 +1,8 @@
 #![cfg_attr(not(test), no_std)]
 
 #[macro_use]
-mod matrix;
-mod matrix_config;
+pub mod matrix;
+pub mod matrix_config;
 pub mod scan;
-mod state;
-mod action;
+pub mod state;
+pub mod action;

src/scan.rs

@@ -1,16 +1,16 @@
 use matrix::Matrix;
 use matrix_config::MatrixConfig;
 
-trait InputPin {
+pub trait InputPin {
   fn read_input(&self) -> u32;
 }
 
-trait OutputPin {
+pub trait OutputPin {
   fn set_low(&self);
   fn set_high(&self);
 }
 
-fn single_scan<MC: MatrixConfig, RM: Matrix<u32>>(conf: &MC) -> RM
+pub fn single_scan<MC: MatrixConfig, RM: Matrix<u32>>(conf: &MC) -> RM
   where MC::InputPin: InputPin,
         MC::OutputPin: OutputPin
 {

src/state.rs

@@ -16,7 +16,7 @@ impl Default for KeyState {
   }
 }
 
-fn process_key_state<RM, SM>(result: RM, previous_result: RM) -> SM
+pub fn process_key_state<RM, SM>(result: RM, previous_result: RM) -> SM
   where RM: Matrix<u32>,
         SM: Matrix<KeyState>
 {