diff --git a/radio.h b/radio.h
index 71eeb33..f170a60 100644
--- a/radio.h
+++ b/radio.h
@@ -26,67 +26,6 @@
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-//
-// Connect to the radio via the serial port.
-// Identify the type of device.
-//
-//void radio_connect(void);
-
-//
-// Close the serial port.
-//
-void radio_disconnect(void);
-
-//
-// Read firmware image from the device.
-//
-//void radio_download(void);
-
-//
-// Write firmware image to the device.
-//
-//void radio_upload(int cont_flag);
-
-//
-// Print a generic information about the device.
-//
-//void radio_print_version(FILE *out);
-
-//
-// Print full information about the device configuration.
-//
-void radio_print_config(FILE *out, int verbose);
-
-//
-// Read firmware image from the binary file.
-//
-void radio_read_image(const char *filename);
-
-//
-// Save firmware image to the binary file.
-//
-void radio_save_image(const char *filename);
-
-//
-// Read the configuration from text file, and modify the firmware.
-//
-void radio_parse_config(const char *filename);
-
-//
-// Check the configuration.
-//
-void radio_verify_config(void);
-
-//
-// Update CSV contacts database.
-//
-void radio_write_csv(const char *filename);
-
-//
-// List all supported radios.
-//
-//void radio_list_c(void);
-
 //
 // Check for compatible radio model.
 //
diff --git a/src/radio.rs b/src/radio.rs
index 0377d76..fd5a240 100644
--- a/src/radio.rs
+++ b/src/radio.rs
@@ -20,44 +20,51 @@ extern {
   fn radio_write_csv(filename: *const c_char);
 }
 
+/// Connect to the radio via the serial port.
+/// Identify the type of device.
 pub fn connect() -> *const RadioDeviceT {
   unsafe {
     radio_connect()
   }
 }
 
+/// Close the serial port.
 pub fn disconnect() {
   unsafe {
     radio_disconnect()
   }
 }
 
+/// Read firmware image from the device
 pub fn download(device: *const RadioDeviceT) {
   unsafe {
     radio_download(device)
   }
 }
 
+/// Write firmware image to the device.
 pub fn upload(device: *const RadioDeviceT, cont_flag: c_int) {
   unsafe {
     radio_upload(device, cont_flag)
   }
 }
 
+/// List all supported radios.
 pub fn list() {
 
-
   unsafe {
     radio_list_c();
   }
 }
 
+/// Check the configuration.
 pub fn verify_config() {
   unsafe {
     radio_verify_config();
   }
 }
 
+/// Read firmware image from the binary file.
 pub fn read_image(filename: &str) {
   let filename = CString::new(filename.to_string()).unwrap();
   unsafe {
@@ -65,6 +72,7 @@ pub fn read_image(filename: &str) {
   }
 }
 
+/// Save firmware image to the binary file.
 pub fn save_image(filename: &str) {
   let filename = CString::new(filename.to_string()).unwrap();
   unsafe {
@@ -72,6 +80,7 @@ pub fn save_image(filename: &str) {
   }
 }
 
+/// Read the configuration from text file, and modify the firmware.
 pub fn parse_config(filename: &str) {
   let filename = CString::new(filename.to_string()).unwrap();
   unsafe {
@@ -79,6 +88,7 @@ pub fn parse_config(filename: &str) {
   }
 }
 
+/// Print full information about the device configuration.
 pub fn print_config(filename: &str) {
   let file = std::fs::File::create(filename).unwrap();
   let fd = file.as_raw_fd();
@@ -103,6 +113,7 @@ pub fn print_config_to_stdout() {
   }
 }
 
+/// Print generic information about the device.
 pub fn print_version(device: *const RadioDeviceT) {
   let mode = CString::new("w").unwrap();
   unsafe {
@@ -110,6 +121,7 @@ pub fn print_version(device: *const RadioDeviceT) {
   }
 }
 
+/// Update CSV contacts database.
 pub fn write_csv(filename: &str) {
   let filename = CString::new(filename.to_string()).unwrap();
   unsafe {