Updated headers and lib for control center downstream to current versions.

By now codegeneration for downstream data transmisson from control center
to raspberry pi works.

org.fortiss.af3.platform.raspberry/code-gen-hal/inc/af3pihal/af3.h

@@ -89,7 +89,7 @@ void af3_cc_send_double(char* signal, GEN_TYPE_double value, uint64_t timestamp)
 /** listener for received messages**/
 void af3_cc_listen(void (*listener_handler) (receive_message_t));
 /** Receive a message from control center. */
-void af3_cc_receive(void *listener_handler);
+void* af3_cc_receive(void *listener_handler);
 /** Deactivates the control center connection. */
 void af3_cc_deactivate();
 

org.fortiss.af3.platform.raspberry/code-gen-hal/inc/af3pihal/control_center_downstream.h

@@ -27,7 +27,8 @@ typedef struct receive_message_t{
 
 /**
  * \brief Initialize the downstream communication for control center.
- * Currently just initializes a mutex.
+ * Currently just initializes a mutex and starts a thread listening for incoming
+ * messages.
  */
 void af3_cc_donwstream_init(void);
 

org.fortiss.af3.platform.raspberry/code-gen-hal/inc/af3pihal/protocol_control_center.h

@@ -27,6 +27,9 @@ void protocol_control_center_create(protocol_control_center_configuration_t* con
 /** Writes len bytes of the given text to the control center. */
 void protocol_control_center_write(char* text, size_t len);
 
+/** Reads at maximum len bytes from control center to the given buffer. */
+void protocol_control_center_receive(char* text, size_t len);
+
 /** Terminates the connection to the control center. */
 void protocol_control_center_terminate();