Updtate event handling model in NFCEEPROM

Author: Donatien Garnier

docs/design-documents/nfc/nfc_design.md

@@ -537,7 +537,6 @@ The `set_size()` command is called to change the size of the buffer (within the
 
 ```cpp
 void reset();
-void process_events();
 size_t get_max_size();
 void start_session();
 void end_session();
@@ -557,7 +556,12 @@ void on_bytes_written(size_t count);
 void on_size_read(bool success, size_t size);
 void on_size_written(bool success);
 void on_bytes_erased(size_t count);
-void on_event();
+```
+
+The implementation also has access to an event queue in case asynchronous operations need to be run:
+```cpp
+Delegate *delegate();
+events::EventQueue *event_queue();
 ```
 
 ### NCI Driver APIs

docs/design-documents/nfc/uml_diagram_endpoints.png

@@ -40,6 +40,7 @@ abstract class NFCTarget::Delegate {
 }
 
 class NFCEEPROM {
+  +nfc_err_t initialize()
   +void set_delegate(NFCEEPROM::Delegate* delegate)
 }
 
@@ -49,9 +50,9 @@ abstract class NFCEEPROM::Delegate {
 
 abstract class NFCEEPROMDriver {
   +void set_delegate(Delegate* delegate)
+  +void set_event_queue(events::EventQueue* queue)
 
   +{abstract} void reset()
-  +{abstract} void process_events()
   +{abstract} size_t get_max_size()
   +{abstract} void start_session()
   +{abstract} void end_session()
@@ -60,6 +61,8 @@ abstract class NFCEEPROMDriver {
   +{abstract} void write_size(size_t count)
   +{abstract} void read_size()
   +{abstract} void erase_bytes(uint32_t address, size_t size)
+  #Delegate *delegate()
+  #events::EventQueue *event_queue()
 }
 
 abstract class NFCEEPROMDriver::Delegate {
@@ -70,7 +73,6 @@ abstract class NFCEEPROMDriver::Delegate {
   +{abstract} void on_size_read(bool success, size_t size)
   +{abstract} void on_size_written(bool success)
   +{abstract} void on_bytes_erased(size_t count)
-  +{abstract} void on_event()
 }
 
 NFCNDEFCapable <-- NFCTarget