add write example

examples/Pico_write.py

@@ -0,0 +1,48 @@
+from mfrc522 import MFRC522
+
+
+def uidToString(uid):
+    mystring = ""
+    for i in uid:
+        mystring = "%02X" % i + mystring
+    return mystring
+
+reader = MFRC522(spi_id=0,sck=2,miso=4,mosi=3,cs=1,rst=0)
+
+print("")
+print("Place card before reader to read from address 0x08")
+print("")
+
+key = [0xFF,0xFF,0xFF,0xFF,0xFF,0xFF]
+
+try:
+    while True:
+
+        (stat, tag_type) = reader.request(reader.REQIDL)
+
+        if stat == reader.OK:
+            (stat, uid) = reader.SelectTagSN()
+            if stat == reader.OK:
+                print(uid)
+                print("Card detected %s" % uidToString(uid))
+                reader.MFRC522_DumpClassic1K(key, uid)
+                print("Test ! writing sector 2, block 0 (absolute block(8)")
+                print("with [ 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 ]")
+                absoluteBlock=8
+                value=[]
+                for i in range(16):
+                    value.append(i)
+                status = reader.auth(reader.AUTHENT1A, absoluteBlock, key, uid)
+                if status == reader.OK:
+                    status = reader.write(absoluteBlock,value)
+                    if status == reader.OK:
+                        reader.MFRC522_DumpClassic1K(key, uid)
+                    else:
+                        print("unable to write")
+                else:
+                    print("Authentication error for writing")
+                break
+except KeyboardInterrupt:
+    print("Bye")
+
+