--- a/examples/tty/tty.c	Thu Sep 06 14:21:02 2012 +0200
+++ b/examples/tty/tty.c	Mon Nov 03 15:20:05 2014 +0100
@@ -141,8 +141,8 @@
     // send process data
     down(&master_sem);
     ecrt_domain_queue(domain1);
-    up(&master_sem);
     ecrt_master_send(master);
+    up(&master_sem);
 
     // restart timer
     timer.expires += HZ / FREQUENCY;
@@ -151,17 +151,21 @@
 
 /*****************************************************************************/
 
-void request_lock_callback(void *cb_data)
+void send_callback(void *cb_data)
 {
     ec_master_t *m = (ec_master_t *) cb_data;
     down(&master_sem);
-}
-
-/*****************************************************************************/
-
-void release_lock_callback(void *cb_data)
+    ecrt_master_send_ext(m);
+    up(&master_sem);
+}
+
+/*****************************************************************************/
+
+void receive_callback(void *cb_data)
 {
     ec_master_t *m = (ec_master_t *) cb_data;
+    down(&master_sem);
+    ecrt_master_receive(m);
     up(&master_sem);
 }
 
@@ -171,18 +175,18 @@
 {
     int ret = -1;
     ec_slave_config_t *sc;
-    
+
     printk(KERN_INFO PFX "Starting...\n");
 
     master = ecrt_request_master(0);
     if (!master) {
         printk(KERN_ERR PFX "Requesting master 0 failed.\n");
-        ret = -EBUSY; 
+        ret = -EBUSY;
         goto out_return;
     }
 
     sema_init(&master_sem, 1);
-    ecrt_master_callbacks(master, request_lock_callback, release_lock_callback, master);
+    ecrt_master_callbacks(master, send_callback, receive_callback, master);
 
     printk(KERN_INFO PFX "Registering domain...\n");
     if (!(domain1 = ecrt_master_create_domain(master))) {