ST
This application provides a set of demos with X-NUCLEO-NFC01A1 expansion board.
Dependencies: NDefLib X_NUCLEO_NFC01A1 mbed
Fork of
X-MBED-NFC1
by 
Giovanni Visentini
This application provides a set of demos with X-NUCLEO-NFC01A1 expansion board.
The available demos are:
- SAMPLE_WRITE_URL: write a tag with the ST home page URL
- SAMPLE_COUNT_CLICK: create a custom tag to count and report the user button clicks.
- SAMPLE_WRITE_AND_CHANGE_ALL: write a tag with all the supported records and update the tag contents when the user button is pressed.
- SAMPLE_LOCK_TAG_CONTENT: use the M24SR component API to set the NFC tag as read-only.
To enable the different demos comment/uncomment the SAMPLE_* macros provided in main.cpp .
Diff: Type4NfcTagSTM24SR.cpp
- Revision:
- 0:674813bd5ec9
- Child:
- 1:6d202b62ed68
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/Type4NfcTagSTM24SR.cpp Thu Nov 19 08:50:18 2015 +0000
@@ -0,0 +1,110 @@
+/*
+ * Type4NfcTagSTM24SR.cpp
+ *
+ * Created on: Nov 5, 2015
+ * Author: giovanni visentini
+ */
+
+#include <Type4NfcTagSTM24SR.h>
+
+/* wait 1sec, driver is configured to let 200ms for command to complete */
+/* which is enough for all commands except GetSession if RF session is already opened */
+/* Smartphone generaly release the session within the second, but customer can modify this value */
+#define OPENSESSION_NTRIALS 5
+
+#define CC_FILE_LENGTH_BYTE 15
+
+bool Type4NfcTagSTM24SR::openSession(bool force){
+
+ if(mSessionIsOpen)
+ return true;
+ //else
+ if(force)
+ mDevice.KillSession();
+
+
+ int8_t nTrials=OPENSESSION_NTRIALS;
+ NFC_StatusTypeDef status = NFC_ERROR;
+ while(status != NFC_OK && nTrials){
+ status = mDevice.GetSession( );
+ nTrials--;
+ }
+
+ if (status != NFC_OK){
+ return false;
+ }//else
+
+ //Select the NFC type 4 application
+ if(mDevice.SelectApplication()!=NFC_OK)
+ return false;
+
+ if(mDevice.SelectCCfile()!=NFC_OK)
+ return false;
+
+ uint8_t CCFile[CC_FILE_LENGTH_BYTE];
+ /* read the first 15 bytes of the CC file */
+ if(mDevice.ReadBinary(0x0000,CC_FILE_LENGTH_BYTE,CCFile)!=NFC_OK)
+ return false;
+
+ //read the ndefFileId
+ uint16_t ndefFileId = (uint16_t) ((CCFile[0x09]<<8) | CCFile[0x0A]);
+ mMaxReadBytes = (uint16_t) ((CCFile[0x03]<<8) | CCFile[0x04]);
+ mMaxWriteBytes =(uint16_t) ((CCFile[0x05]<<8) | CCFile[0x06]);
+
+ //openit
+ if(mDevice.SelectNDEFfile(ndefFileId)!=NFC_OK)
+ return false;
+
+ mSessionIsOpen=true;
+ return true;
+}
+
+
+bool Type4NfcTagSTM24SR::closeSession(){
+
+ //no open session
+ if(!mSessionIsOpen)
+ return true;
+
+ //close the CC file
+ if(mDevice.Deselect()!=NFC_OK)
+ return false;
+
+ mSessionIsOpen=false;
+ return true;
+}
+
+bool Type4NfcTagSTM24SR::writeByte(uint8_t *buffer,uint16_t length){
+
+ NFC_StatusTypeDef status=NFC_OK;
+ uint16_t offset=0;
+ bool prevSessionStatus = mSessionIsOpen;
+ if(!prevSessionStatus){
+ //try to acquire a session or fail
+ if(openSession(false))
+ return false;
+ }//if
+
+ if( length > mMaxWriteBytes){
+ do{
+ status = mDevice.UpdateBinary ( offset, mMaxWriteBytes , buffer);
+ offset += mMaxWriteBytes;
+ buffer += mMaxWriteBytes;
+ length -= mMaxWriteBytes;
+ }while( length > mMaxWriteBytes && status == NFC_OK);
+ }//if
+
+ //finish to write the buffer
+ if( status == NFC_OK && mMaxWriteBytes)
+ status = mDevice.UpdateBinary ( offset,length , buffer);
+
+ if(status==NFC_OK){
+ if(!prevSessionStatus) // if the session was closed, try close it
+ return closeSession();
+ else
+ return true;
+ }else
+ return false;
+
+}
+