Diff: Samples/sampleAsync_lockWriteTag.cpp

Revision:

13:685d95525ec8

Child:

14:3b604972b89f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Samples/sampleAsync_lockWriteTag.cpp	Mon Feb 01 15:33:26 2016 +0000
@@ -0,0 +1,270 @@
+/**
+  ******************************************************************************
+  * @file       Sample_lockWriteTag.cpp
+  * @author     ST / Central Labs
+  * @date       03 Dic 2015
+  * @brief      This demo define a lock/unlock the tag content when the user press
+  *  the user button
+  ******************************************************************************
+  *
+  * COPYRIGHT(c) 2015 STMicroelectronics
+  *
+  * Redistribution and use in source and binary forms, with or without modification,
+  * are permitted provided that the following conditions are met:
+  *   1. Redistributions of source code must retain the above copyright notice,
+  *      this list of conditions and the following disclaimer.
+  *   2. Redistributions in binary form must reproduce the above copyright notice,
+  *      this list of conditions and the following disclaimer in the documentation
+  *      and/or other materials provided with the distribution.
+  *   3. Neither the name of STMicroelectronics nor the names of its contributors
+  *      may be used to endorse or promote products derived from this software
+  *      without specific prior written permission.
+  *
+  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  *
+  ******************************************************************************
+  */
+
+#include "mbed.h"
+
+#include "X_NUCLEO_NFC01A1.h"
+
+static bool buttonPress=false; /// true when the user press the message
+static bool nfcEvent=false; /// true when the user press the message
+
+static void setNfcEventCallback(){
+	nfcEvent=true;
+}//if buttonPress
+/**
+ * Call back called when the user press the button.
+ */
+static void setButtonPress(){
+    buttonPress=true;
+}//if buttonPress
+
+/**
+ * Class with the command chain needed for remove all the read/write password
+ */
+class RemoveAllPasswordStatusCallback : public Nfc::Callback {
+
+public:
+
+	RemoveAllPasswordStatusCallback():mIsComamndRunning(false){}
+
+	/**
+	 * true when the command chain finish, and the the tag can now be read and write
+	 * @return true if the command chain finish
+	 */
+	bool isFinish(){
+		return !mIsComamndRunning;
+	}
+
+
+private:
+	bool mIsComamndRunning; /// false when the command chain finish
+
+	/**
+	 * end the command chain and print an error message
+	 * @param status error code of the last command
+	 */
+	void onError(const NFC_StatusTypeDef status){
+		mIsComamndRunning=false;
+		printf("Error Code: %X \r\n",status);
+	}
+
+	virtual void onSessionOpen(Nfc *tag,NFC_StatusTypeDef status){
+		if(status!=NFC_SUCCESS)
+			return onError(status);
+		mIsComamndRunning=true;
+
+		tag->SelectApplication();
+	}
+
+	virtual void onSelectedApplication(Nfc *tag,NFC_StatusTypeDef status){
+		if(status!=NFC_SUCCESS)
+			return onError(status);
+
+		tag->SelectNDEFfile(0x0001);
+	}
+
+	virtual void onSelectedNDEFFile(Nfc *tag,NFC_StatusTypeDef status){
+		if(status!=NFC_SUCCESS)
+			return onError(status);
+
+		tag->DisableAllPassword(M24SR::DEFAULT_PASSWORD);
+	}
+
+	virtual void onDisableAllPassword(Nfc *tag, NFC_StatusTypeDef status){
+		if(status!=NFC_SUCCESS)
+			return onError(status);
+
+		tag->Deselect();
+	}
+
+	virtual void onDeselect(Nfc *,NFC_StatusTypeDef status){
+		if(status!=NFC_SUCCESS)
+			return onError(status);
+		mIsComamndRunning=false;
+	}
+
+};
+
+/**
+ * Chain of call needed for change the tag status between read only and write/read
+ */
+class ChangeTagStatusCallback : public Nfc::Callback {
+
+	M24SR &mNfcTag; /// object to change
+	DigitalOut& mReadOnlyLed; /// led to switch on when it is in read only mode
+	DigitalOut& mReadWriteWriteLed; /// led to switch on when is in read/write mode
+
+	bool mIsReadOnly; /// current tag status
+	bool mIsComamndRunning; /// true if the chain is running
+
+	public:
+
+		/**
+		 * Build a chain of callback needed for change the tag status.
+		 * @param nfcTag Tag to change.
+		 * @param readLed Led to switch on when in read only mode.
+		 * @param writeLed Led to switch on when in read/write mode.
+		 */
+		ChangeTagStatusCallback(M24SR &nfcTag, DigitalOut& readLed, DigitalOut& writeLed):
+			mNfcTag(nfcTag),mReadOnlyLed(readLed),mReadWriteWriteLed(writeLed),mIsReadOnly(false),
+			mIsComamndRunning(false){
+			mReadOnlyLed=false;
+			mReadWriteWriteLed=true;
+		}
+
+		/**
+		 * Change the tag status
+		 */
+		void changeStatus(){
+			mIsReadOnly=!mIsReadOnly;
+			//if it is not running a previous command
+			if(!mIsComamndRunning){
+				mNfcTag.GetSession();
+			}//if
+		}//changeStatus;
+
+	private:
+
+		/**
+		 * When an error happen switch on both the led and print the error code.
+		 * @param status Error code.
+		 */
+		void onError(const NFC_StatusTypeDef status){
+			mIsComamndRunning=false;
+			mReadOnlyLed=true;
+			mReadWriteWriteLed=true;
+			printf("Error %X changing the status\r\n",status);
+		}
+
+		virtual void onSessionOpen(Nfc *,NFC_StatusTypeDef status){
+			if(status!=NFC_SUCCESS)
+				return onError(status);
+			mNfcTag.SelectApplication();
+		}
+
+		virtual void onSelectedApplication(Nfc *,NFC_StatusTypeDef status){
+			if(status!=NFC_SUCCESS)
+				return onError(status);
+			mNfcTag.SelectNDEFfile(0x0001);
+		}
+
+		virtual void onSelectedNDEFFile(Nfc *,NFC_StatusTypeDef status){
+			if(status!=NFC_SUCCESS)
+				return onError(status);
+
+			if(mIsReadOnly){
+				mNfcTag.EnableReadOnly(M24SR::DEFAULT_PASSWORD);
+			}else
+				mNfcTag.DisableReadOnly(M24SR::DEFAULT_PASSWORD);
+		}
+
+
+		virtual void onEnableReadOnly(Nfc *,NFC_StatusTypeDef status){
+			if(status!=NFC_SUCCESS)
+				return onError(status);
+
+			if(!mIsReadOnly) //if in the meantime the status change
+				mNfcTag.DisableReadOnly(M24SR::DEFAULT_PASSWORD);
+			else{
+				mReadOnlyLed=true;
+				mReadWriteWriteLed=false;
+				mNfcTag.Deselect();
+			}
+		}
+
+		virtual void onDisableReadOnly(Nfc *,NFC_StatusTypeDef status){
+			if(status!=NFC_SUCCESS)
+				return onError(status);
+
+			if(mIsReadOnly) //if in the meantime the status change
+				mNfcTag.EnableReadOnly(M24SR::DEFAULT_PASSWORD);
+			else{
+				mReadOnlyLed=false;
+				mReadWriteWriteLed=true;
+				mNfcTag.Deselect();
+			}
+		}
+
+		virtual void onDeselect(Nfc *,NFC_StatusTypeDef status){
+			if(status!=NFC_SUCCESS)
+				return onError(status);
+			mIsComamndRunning=false;
+		}
+};
+
+/**
+ * When the user press the button enable/disable the tag write protection.
+ */
+void sampleAsync_lockTagContent() {
+
+    //instance the board with the default parameters
+    I2C i2cChannel(X_NUCLEO_NFC01A1::DEFAULT_SDA_PIN,X_NUCLEO_NFC01A1::DEFAULT_SDL_PIN);
+    X_NUCLEO_NFC01A1 *nfcNucleo = X_NUCLEO_NFC01A1::Instance(i2cChannel,&setNfcEventCallback);
+	
+    //when the user press the button set buttonPress to true
+    InterruptIn userButton(USER_BUTTON);
+    userButton.fall(setButtonPress);
+    
+    M24SR &nfcTag =nfcNucleo->getM24SR();
+
+    //set async mode
+    if(nfcTag.GetSession()!=NFC_SUCCESS)
+    	nfcTag.ManageI2CGPO(I2C_ANSWER_READY);
+
+
+    ChangeTagStatusCallback changeTagStatus(nfcTag,nfcNucleo->getLed2(),nfcNucleo->getLed3());
+    RemoveAllPasswordStatusCallback removeAllPasswordStatusCallback;
+
+    nfcTag.SetCallback(&removeAllPasswordStatusCallback);
+    nfcTag.GetSession();
+    nfcNucleo->getLed1()=true;
+
+    while(true){
+
+        if(buttonPress && removeAllPasswordStatusCallback.isFinish()){
+        	buttonPress=false;
+            nfcTag.SetCallback(&changeTagStatus);
+        	changeTagStatus.changeStatus();
+        }//if
+        if(nfcEvent){
+        	nfcEvent=false;
+        	nfcTag.ManageEvent();
+        }
+        //wait next event
+        __WFE();
+    }//while
+
+}//sampleAsync_lockTagContent
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