From f50b0c513c63b30b851dba89961d8fdbe448c46b Mon Sep 17 00:00:00 2001
From: danjperron <danjperron@videotron.ca>
Date: Wed, 17 Jan 2024 16:20:18 -0500
Subject: [PATCH] add NTAG NFC

---
 Pico_example/Pico_read.py | 16 +++++--
 mfrc522.py                | 96 ++++++++++++++++++++++++++++++++++++++-
 2 files changed, 108 insertions(+), 4 deletions(-)

diff --git a/Pico_example/Pico_read.py b/Pico_example/Pico_read.py
index 8950f52..60acc16 100644
--- a/Pico_example/Pico_read.py
+++ b/Pico_example/Pico_read.py
@@ -23,6 +23,7 @@ try:
     while True:
 
         reader.init()
+        
         (stat, tag_type) = reader.request(reader.REQIDL)
         #print('request stat:',stat,' tag_type:',tag_type)
         if stat == reader.OK:
@@ -31,9 +32,18 @@ try:
                 continue
             if stat == reader.OK:
                 print("Card detected {}  uid={}".format(hex(int.from_bytes(bytes(uid),"little",False)).upper(),reader.tohexstring(uid)))
-                defaultKey = [255,255,255,255,255,255]
-                reader.MFRC522_DumpClassic1K(uid, Start=0, End=64, keyA=defaultKey)
-                print("Done")
+                
+                if reader.IsNTAG():
+                    print("Got NTAG{}".format(reader.NTAG))
+                    reader.MFRC522_Dump_NTAG(Start=0,End=reader.NTAG_MaxPage)
+                    #print("Write Page 5  to 0x1,0x2,0x3,0x4  in 2 second")
+                    #utime.sleep(2)
+                    #data = [1,2,3,4]
+                    #reader.writeNTAGPage(5,data)
+                    #reader.MFRC522_Dump_NTAG(uid,Start=5,End=6)
+                else:
+                    defaultKey = [255,255,255,255,255,255]
+                    reader.MFRC522_DumpClassic1K(Start=0, End=64, keyA=defaultKey)
                 PreviousCard = uid
             else:
                 pass
diff --git a/mfrc522.py b/mfrc522.py
index adf97ac..1e891a3 100644
--- a/mfrc522.py
+++ b/mfrc522.py
@@ -9,6 +9,12 @@ class MFRC522:
     NOTAGERR = 1
     ERR = 2
 
+
+    NTAG_213 = 213
+    NTAG_215 = 215
+    NTAG_216 = 216
+    NTAG_NONE = 0
+
     REQIDL = 0x26
     REQALL = 0x52
     AUTHENT1A = 0x60
@@ -29,7 +35,8 @@ class MFRC522:
 
         self.rst.value(0)
         self.cs.value(1)
-        
+        self.NTAG = 0
+        self.NTAG_MaxPage = 0
         board = uname()[0]
 
         if board == 'WiPy' or board == 'LoPy' or board == 'FiPy':
@@ -379,4 +386,91 @@ class MFRC522:
             return self.ERR
         return self.OK
         
+    def MFRC522_Dump_NTAG(self,Start=0, End=135):
+        for absoluteBlock in range(Start,End,4):
+            MaxIndex = 4 * 135
+            status = self.OK
+            print("Page {:02d}: ".format(absoluteBlock),end="")
+            if status == self.OK:                    
+                status, block = self.read(absoluteBlock)
+                if status == self.ERR:
+                    break
+                else:
+                    Index = absoluteBlock*4
+                    for i in range(len(block)):
+                        if Index < MaxIndex :
+                           print("{:02X} ".format(block[i]),end="")
+                        else:
+                           print("   ",end="")
+                        if (i%4)==3:
+                           print(" ",end="")
+                        Index+=1
+                    print("  ",end="")
+                    Index = absoluteBlock*4
+                    for value in block:
+                        if Index < MaxIndex:
+                            if (value > 0x20) and (value < 0x7f):
+                                print(chr(value),end="")
+                            else:
+                                print('.',end="")
+                        Index+=1
+                    print("")
+            else:
+                break
+        if status == self.ERR:
+            print("Authentication error")
+            return self.ERR
+        return self.OK
                 
+    def writeNTAGPage(self,page,data):
+        if page>self.NTAG_MaxPage:
+            return self.ERR
+        if page < 4:
+            return self.ERR
+        if len(data) != 4:
+            return self.ERR
+        
+        return self.write(page,data+[0]*12)
+    
+    def getNTAGVersion(self):
+         buf = [0x60]
+         buf += self._crc(buf)
+         stat, recv,_ = self._tocard(0x0C, buf)
+         return stat, recv
+        
+        
+    #Version NTAG213 = [0x0 ,0x4, 0x4, 0x2, 0x1, 0x0,0x0f, 0x3]
+    #Version NTAG215 = [0x0 ,0x4, 0x4, 0x2, 0x1, 0x0,0x11, 0x3]
+    #Version NTAG216 = [0x0 ,0x4, 0x4, 0x2, 0x1, 0x0,0x13, 0x3]
+            
+    def IsNTAG(self):
+        self.NTAG = self.NTAG_NONE
+        self.NTAG_MaxPage=0
+        (stat , rcv) = self.getNTAGVersion()
+        if stat == self.OK:
+            if len(rcv) < 8:
+                return False  #do we have at least 8 bytes
+            if rcv[0] != 0:
+                return False  #check header
+            if rcv[1] != 4:
+                return False  #check Vendor ID
+            if rcv[2] != 4:
+                return False  #check product type
+            if rcv[3] != 2:
+                return False  #check subtype
+            if rcv[7] != 3:
+                return False  #check protocol
+            if rcv[6] == 0xf:
+                self.NTAG= self.NTAG_213  
+                self.NTAG_MaxPage = 44                  
+                return True
+            if rcv[6] == 0x11:
+                self.NTAG= self.NTAG_215
+                self.NTAG_MaxPage = 134                  
+                return True
+            if rcv[7] == 0x13:
+                self.NTAG= self.NTAG_216
+                self.NTAG_MaxPage = 230                  
+                return True
+        return false
+