Diff: main.cpp

Revision:

0:bd569d022b29

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Aug 10 15:01:38 2015 +0000
@@ -0,0 +1,115 @@
+// header
+#include "mbed.h"
+#include "lib_TagType4.h"
+#include "lib_NDEF.h"
+#include "I2C.h"
+#define BITSIZE 100
+#define MAXMEMORY 8190 //pretty sure....
+
+Serial pc(SERIAL_TX, SERIAL_RX);
+ 
+ I2C isquaredc(D14,D15); // I2C pins are D14 and D15
+ 
+DigitalOut myled(LED1);
+//various LEDs on NFC Shield
+DigitalOut nfcled1(D5);
+DigitalOut nfcled2(D4);
+DigitalOut nfcled3(D2);
+//acknowledgement pins
+DigitalOut indicatorM2S(D13);
+DigitalIn indicatorS2M(D10);
+DigitalIn NFC_Written(D12);
+
+int main() {
+    // Create NDEF buffer
+    uint8_t NDEF_Buffer[BITSIZE], Zero_Buffer[MAXMEMORY];
+    memset(NDEF_Buffer, 0, sizeof(NDEF_Buffer));
+    memset(Zero_Buffer, 0, sizeof(Zero_Buffer)); // will not change
+    
+    // start up info... the following code is necessary to read the NFC shield
+    sCCFileInfo CCFileStruct;
+    sCCFileInfo *pCCFile;
+    pCCFile = &CCFileStruct;
+
+    uint16_t status = SUCCESS;
+    uint8_t CCBuffer[15];
+    
+    status = TagT4Init( CCBuffer, sizeof(CCBuffer));
+    
+    if( status == SUCCESS)
+    {   
+        pCCFile->NumberCCByte = (uint16_t) ((CCBuffer[0x00]<<8) | CCBuffer[0x01]);
+        pCCFile->Version = CCBuffer[0x02];
+        pCCFile->MaxReadByte = (uint16_t) ((CCBuffer[0x03]<<8) | CCBuffer[0x04]);
+        pCCFile->MaxWriteByte = (uint16_t) ((CCBuffer[0x05]<<8) | CCBuffer[0x06]);
+        pCCFile->TField = CCBuffer[0x07];
+        pCCFile->LField = CCBuffer[0x08];
+        pCCFile->FileID = (uint16_t) ((CCBuffer[0x09]<<8) | CCBuffer[0x0A]);
+        pCCFile->NDEFFileMaxSize = (uint16_t) ((CCBuffer[0x0B]<<8) | CCBuffer[0x0C]);
+        pCCFile->ReadAccess = CCBuffer[0x0D];
+        pCCFile->WriteAccess = CCBuffer[0x0E];  
+    }
+    
+    // open NDEF session 
+    OpenNDEFSession(pCCFile->FileID, ASK_FOR_SESSION);
+    
+    // write all zeros to NDEF memory
+    NDEF_WriteNDEF(Zero_Buffer);
+    
+    // close NDEF session
+    CloseNDEFSession(pCCFile->FileID);
+    
+    // creat while loop
+    
+    
+    indicatorM2S = 0;
+    
+    pc.printf("init \n");
+    while(1) {
+        if (NFC_Written==0) {
+            pc.printf("session\n");
+            wait(4);
+            //open NDEF session
+            OpenNDEFSession(pCCFile->FileID, ASK_FOR_SESSION);
+            
+            // read NDEF
+            NDEF_ReadNDEF(NDEF_Buffer);
+            
+            // close NDEF session
+            CloseNDEFSession(pCCFile->FileID);
+                 
+            
+            // if NDEF is not all 0s, take the store memory in variable
+            if ((memcmp(Zero_Buffer, NDEF_Buffer, sizeof(NDEF_Buffer)))!=0){ 
+        
+                pc.printf("Tag Identified...\n");
+                    
+                indicatorM2S = 1; // Master indicates to slave that there is a message waiting
+                
+                pc.printf("M2S set HIGH...\n");
+                
+                char send[BITSIZE]; // converting to char in order to send via i2c
+                memcpy(send, NDEF_Buffer, BITSIZE);
+                
+                 while(1){ // waiting for slave to indicate it is ready to receive message
+                     if (indicatorS2M.read() == 1)
+                     
+                    break;
+                // probably should add some type of time out function
+            }
+                pc.printf("S2M awknowledgement recieved...\n");
+                //Send data via I2C
+                isquaredc.write(0x10, send, BITSIZE, 1);
+                pc.printf("I2C.write...\n");
+               // turn off M2S signal
+               indicatorM2S =0;
+                
+                // write all 0s to the NFC memory
+                OpenNDEFSession(pCCFile->FileID, ASK_FOR_SESSION);
+                NDEF_WriteNDEF(Zero_Buffer); 
+                CloseNDEFSession(pCCFile->FileID);
+                memset(NDEF_Buffer, 0, sizeof(NDEF_Buffer));
+            }
+        }
+    }
+}
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