From 4e1642ca1e633d4fcec3045155d0f13c26b0f0b5 Mon Sep 17 00:00:00 2001
From: Ondrej Mikle <ondrej.mikle@gmail.com>
Date: Sat, 19 Jul 2014 02:23:57 +0200
Subject: [PATCH] Interface and device initialization.

---
 brmdoor_nfc.cpp | 28 ++++++++++++++++++++++++++++
 brmdoor_nfc.h   | 26 +++++++++++++++++++++++++-
 brmdoor_nfc.i   |  1 +
 3 files changed, 54 insertions(+), 1 deletion(-)

diff --git a/brmdoor_nfc.cpp b/brmdoor_nfc.cpp
index 65fd701..8f48fb9 100644
--- a/brmdoor_nfc.cpp
+++ b/brmdoor_nfc.cpp
@@ -12,6 +12,30 @@ NFCDevice::NFCDevice()
 {
     pollNr = 20;
     pollPeriod = 2;
+
+    _nfcContext = NULL;
+
+    nfc_init(&_nfcContext);
+    if (_nfcContext == NULL) {
+        throw NFCError("Unable to init libnfc (malloc)");
+    }
+
+    _nfcDevice = nfc_open(_nfcContext, NULL);
+
+    if (_nfcDevice == NULL) {
+        throw NFCError("Unable to open NFC device.");
+    }
+
+    if (nfc_initiator_init(_nfcDevice) < 0) {
+        nfc_close(_nfcDevice);
+        throw NFCError("NFC initiator error");
+    }
+
+}
+
+NFCDevice::~NFCDevice()
+{
+    nfc_exit(_nfcContext);
 }
 
 std::string NFCDevice::scanUID()
@@ -30,3 +54,7 @@ const nfc_modulation NFCDevice::_modulations[5] = {
 const size_t _modulationsLen = 5;
 
 
+NFCError::NFCError(const std::string& msg)
+{
+    _msg = msg;
+}
diff --git a/brmdoor_nfc.h b/brmdoor_nfc.h
index db5698b..add9c06 100644
--- a/brmdoor_nfc.h
+++ b/brmdoor_nfc.h
@@ -2,6 +2,7 @@
 
 #include <string>
 #include <inttypes.h>
+#include <stdexcept>
 
 #include <nfc/nfc.h>
 #include <nfc/nfc-types.h>
@@ -13,7 +14,7 @@ public:
     
     NFCDevice();
     
-    ~NFCDevice() {}
+    virtual ~NFCDevice();
 
     std::string scanUID();
 
@@ -24,6 +25,29 @@ public:
 protected:
 
     static const nfc_modulation _modulations[5];    
+
     static const size_t _modulationsLen = 5;
 
+    nfc_context *_nfcContext;
+
+    nfc_device *_nfcDevice;
+
 };
+
+
+class NFCError: public std::exception
+{
+
+public:
+
+    NFCError(const std::string& msg);
+    
+    const char *what() const throw() {return _msg.c_str();}
+
+    ~NFCError() throw() {}
+
+protected:
+
+    std::string _msg;
+};
+
diff --git a/brmdoor_nfc.i b/brmdoor_nfc.i
index f89e475..98b8c4a 100644
--- a/brmdoor_nfc.i
+++ b/brmdoor_nfc.i
@@ -6,6 +6,7 @@
 %}
 
 %include std_string.i
+%include std_except.i
 
 %include "brmdoor_nfc.h"