Lora: Support user provided LoRaPHY object

To support custom PHY object, a new LoRaWANInterface constructor was
added.

Author: Kimmo Vaisanen

features/lorawan/LoRaWANInterface.cpp

@@ -20,16 +20,28 @@
  */
 
 #include "LoRaWANInterface.h"
+#include "lorastack/phy/loraphy_target.h"
 
 using namespace events;
 
 LoRaWANInterface::LoRaWANInterface(LoRaRadio &radio)
+    : _default_phy(NULL)
 {
-    _lw_stack.bind_radio_driver(radio);
+    _default_phy = new LoRaPHY_region;
+    MBED_ASSERT(_default_phy);
+    _lw_stack.bind_phy_and_radio_driver(radio, *_default_phy);
+}
+
+LoRaWANInterface::LoRaWANInterface(LoRaRadio &radio, LoRaPHY &phy)
+    : _default_phy(NULL)
+{
+    _lw_stack.bind_phy_and_radio_driver(radio, phy);
 }
 
 LoRaWANInterface::~LoRaWANInterface()
 {
+    delete _default_phy;
+    _default_phy = NULL;
 }
 
 lorawan_status_t LoRaWANInterface::initialize(EventQueue *queue)

features/lorawan/LoRaWANInterface.h

@@ -24,6 +24,8 @@
 #include "LoRaRadio.h"
 #include "LoRaWANBase.h"
 
+class LoRaPHY;
+
 class LoRaWANInterface: public LoRaWANBase {
 
 public:
@@ -33,9 +35,19 @@ class LoRaWANInterface: public LoRaWANBase {
      * Currently, LoRaWANStack is a singleton and you should only
      * construct a single instance of LoRaWANInterface.
      *
+     * LoRaWANInterface will construct PHY based on "lora.phy" setting in mbed_app.json.
+     *
+     * @param radio A reference to radio object
      */
     LoRaWANInterface(LoRaRadio &radio);
 
+    /** Constructs a LoRaWANInterface using the user provided PHY object.
+
+     * @param radio A reference to radio object
+     * @param phy   A reference to PHY object
+     */
+    LoRaWANInterface(LoRaRadio &radio, LoRaPHY &phy);
+
     virtual ~LoRaWANInterface();
 
     /** Initialize the LoRa stack.
@@ -508,6 +520,13 @@ class LoRaWANInterface: public LoRaWANBase {
     typedef mbed::ScopedLock<LoRaWANInterface> Lock;
 
     LoRaWANStack _lw_stack;
+
+    /** PHY object if created by LoRaWANInterface
+     *
+     * PHY object if LoRaWANInterface has created it.
+     * If PHY object is provided by the application, this pointer is NULL.
+     */
+    LoRaPHY *_default_phy;
 };
 
 #endif /* LORAWANINTERFACE_H_ */

features/lorawan/LoRaWANStack.cpp

@@ -98,15 +98,16 @@ LoRaWANStack::LoRaWANStack()
 /*****************************************************************************
  * Public Methods                                                            *
  ****************************************************************************/
-void LoRaWANStack::bind_radio_driver(LoRaRadio &radio)
+void LoRaWANStack::bind_phy_and_radio_driver(LoRaRadio &radio, LoRaPHY &phy)
 {
     radio_events.tx_done = mbed::callback(this, &LoRaWANStack::tx_interrupt_handler);
     radio_events.rx_done = mbed::callback(this, &LoRaWANStack::rx_interrupt_handler);
     radio_events.rx_error = mbed::callback(this, &LoRaWANStack::rx_error_interrupt_handler);
     radio_events.tx_timeout = mbed::callback(this, &LoRaWANStack::tx_timeout_interrupt_handler);
     radio_events.rx_timeout = mbed::callback(this, &LoRaWANStack::rx_timeout_interrupt_handler);
 
-    _loramac.bind_radio_driver(radio);
+    phy.set_radio_instance(radio);
+    _loramac.bind_phy(phy);
 
     radio.lock();
     radio.init_radio(&radio_events);

features/lorawan/LoRaWANStack.h

@@ -51,23 +51,27 @@
 #include "system/lorawan_data_structures.h"
 #include "LoRaRadio.h"
 
+class LoRaPHY;
+
 class LoRaWANStack: private mbed::NonCopyable<LoRaWANStack> {
 
 public:
     LoRaWANStack();
 
-    /** Binds radio driver to PHY layer.
+    /** Binds PHY layer and radio driver to stack.
      *
      * MAC layer is totally detached from the PHY layer so the stack layer
-     * needs to play the role of an arbitrator. This API gets a radio driver
-     * object from the application (via LoRaWANInterface), binds it to the PHY
-     * layer and initialises radio callback handles which the radio driver will
+     * needs to play the role of an arbitrator.
+     * This API sets the PHY layer object to stack and bind the radio driver
+     * object from the application to the PHY layer.
+     * Also initialises radio callback handles which the radio driver will
      * use in order to report events.
      *
      * @param radio            LoRaRadio object, i.e., the radio driver
+     * @param phy              LoRaPHY object.
      *
      */
-    void bind_radio_driver(LoRaRadio &radio);
+    void bind_phy_and_radio_driver(LoRaRadio &radio, LoRaPHY &phy);
 
     /** End device initialization.
      * @param queue            A pointer to an EventQueue passed from the application.