Adds Arduino Due Support and NexPage change pic method

.gitignore

@@ -0,0 +1 @@
+.idea

NexPage.cpp

@@ -36,3 +36,16 @@ bool NexPage::show(void)
     return recvRetCommandFinished();
 }
 
+bool NexPage::setPic(uint32_t number)
+{
+    char buf[10] = {0};
+    String cmd;
+
+    utoa(number, buf, 10);
+    cmd += getObjName();
+    cmd += ".pic=";
+    cmd += buf;
+
+    sendCommand(cmd.c_str());
+    return recvRetCommandFinished();
+}

NexPage.h

@@ -42,6 +42,16 @@ class NexPage: public NexTouch
      * @return true if success, false for faileure.
      */
     bool show(void);
+
+    /**
+     * Set picture's number.
+     *
+     * @param number -the picture number.
+     *
+     * @retval true - success.
+     * @retval false - failed.
+     */
+    bool setPic(uint32_t number);
 };
 /**
  * @}

NexUpload.cpp

@@ -14,9 +14,13 @@
  */
 
 #include "NexUpload.h"
-#include <SoftwareSerial.h>
 
 //#define USE_SOFTWARE_SERIAL
+
+#ifdef USE_SOFTWARE_SERIAL
+#include <SoftwareSerial.h>
+#endif
+
 #ifdef USE_SOFTWARE_SERIAL
 SoftwareSerial dbSerial(3, 2); /* RX:D3, TX:D2 */
 #define DEBUG_SERIAL_ENABLE