Add PN512 Driver implementation

features/nfc/controllers/PN512Driver.h

@@ -30,13 +30,14 @@ namespace nfc {
     public:
         PN512Driver(PN512TransportDriver* transport_driver);
 
-        virtual void initialize(nfc_scheduler_timer_t* pTimer) = 0;
+        virtual nfc_transceiver_t* initialize(nfc_scheduler_timer_t* scheduler_timer);
-        virtual nfc_transceiver_t* get_transceiver() const;
+        virtual void get_supported_nfc_techs(nfc_tech_t* initiator, nfc_tech_t* target) const;
 
     private:
         // PN512TransportDriver::Delegate implementation
         void on_hw_interrupt();
 
+        PN512TransportDriver* _transport_driver;
         pn512_t _pn512;
     };
 

features/nfc/nfc/NFCControllerDriver.h

@@ -36,14 +36,29 @@ namespace nfc {
      * The abstraction for a NFC controller driver.
      * Implementers need to derive from this class and implement its methods.
      */ 
-    struct NFCControllerDriver {
+    class NFCControllerDriver {
+        /**
+         * Instantiate a NFCControllerDriver
+         */ 
+        NFCControllerDriver();
+
+        /**
+         * The NFCControllerDriver delegate
+         */ 
+        struct Delegate {
+            /**
+             * Called when the controller asserts the interrupt line
+             */ 
+            void on_hw_interrupt();
+        };
+
         /**
          * Initialize the driver and retrieve the interface to the controller.
          * 
-         * @param[in] pTimer The MicroNFC timer instance for the scheduler to use
+         * @param[in] scheduler_timer a timer to initialize the controller's scheduler instance with
          * @return an initialized MicroNFC nfc_transceiver_t instance
          */ 
-        virtual nfc_transceiver_t* initialize(nfc_scheduler_timer_t* timer) = 0;
+        virtual nfc_transceiver_t* initialize(nfc_scheduler_timer_t* scheduler_timer) = 0;
 
         /**
          * Retrieve list of technologies supported by the controller
@@ -51,6 +66,22 @@ namespace nfc {
          * @param[out] target bitmask of technologies supported when the controller is in target mode
          */ 
         virtual void get_supported_nfc_techs(nfc_tech_t* initiator, nfc_tech_t* target) const = 0;
+
+        /**
+         * Set this instance's delegate
+         * 
+         * @param[in] delegate the delegate instance to use
+         */ 
+        void set_delegate(Delegate* delegate);
+    protected:
+
+        /**
+         * An implementation must call this function (can be called from interrupt context) 
+         * when the controller asserts its interrupt line
+         */ 
+        void hw_interrupt();
+    private:
+        Delegate* _delegate;
     };
 
     /**

features/nfc/source/controllers/PN512Driver.cpp

@@ -15,3 +15,46 @@
  */
 
 #include "PN512Driver.h"
+
+PN512Driver::PN512Driver(PN512TransportDriver* transport_driver) : NFCControllerDriver(), _transport_driver(transport_driver) {
+    _transport_driver->set_delegate(this);
+}
+
+nfc_transceiver_t* PN512Driver::initialize(nfc_scheduler_timer_t* scheduler_timer) {
+    // Initialize transport
+    _transport_driver->initialize();
+
+    nfc_err_t ret = pn512_init(&pn512, _transport_driver->get_transport(), scheduler_timer);
+    if( ret != NFC_OK )
+    {
+        NFC_ERR("PN512 init error (%d)", ret);
+        return NULL;
+    }
+    NFC_DBG("PN512 Initialized");
+
+    return pn512_get_transceiver(&pn512);
+}
+
+void PN512Driver::get_supported_nfc_techs(nfc_tech_t* initiator, nfc_tech_t* target) const {
+    initiator->nfc_type1 = 0;
+    initiator->nfc_type2 = 1;
+    initiator->nfc_type3 = 1;
+    initiator->nfc_iso_dep_a = 1;
+    initiator->nfc_iso_dep_b = 0;
+    initiator->nfc_nfc_dep_a = 1;
+    initiator->nfc_nfc_dep_f_212 = 1;
+    initiator->nfc_nfc_dep_f_424 = 1;
+
+    target->nfc_type1 = 0;
+    target->nfc_type2 = 0;
+    target->nfc_type3 = 0;
+    target->nfc_iso_dep_a = 1;
+    target->nfc_iso_dep_b = 0;
+    target->nfc_nfc_dep_a = 1;
+    target->nfc_nfc_dep_f_212 = 1;
+    target->nfc_nfc_dep_f_424 = 1;
+}
+
+void PN512Driver::on_hw_interrupt() {
+    hw_interrupt(); // Propagate interrupt signal
+}

features/nfc/source/controllers/PN512TransportDriver.cpp

@@ -19,7 +19,7 @@
 using namespace mbed;
 using namespace mbed::nfc;
 
-PN512TransportDriver::PN512TransportDriver() : _delegate() {
+PN512TransportDriver::PN512TransportDriver() : _delegate(NULL) {
 
 }
 
@@ -31,4 +31,4 @@ void PN512TransportDriver::hw_interrupt() {
     if(_delegate != NULL) {
         _delegate->on_hw_interrupt();
     }
-}
+}

features/nfc/source/nfc/NFCControllerDriver.cpp

@@ -0,0 +1,34 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2018 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "NFCControllerDriver.h"
+
+using namespace mbed;
+using namespace mbed::nfc;
+
+NFCControllerDriver::NFCControllerDriver() : _delegate(NULL) {
+
+}
+
+void NFCControllerDriver::set_delegate(Delegate* delegate) {
+    _delegate = delegate;
+}
+
+void NFCControllerDriver::hw_interrupt() {
+    if(_delegate != NULL) {
+        _delegate->on_hw_interrupt();
+    }
+}