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MFRC522-python/MFRC522.py
Cotix 0bd5ebf0dc Finished it 
Added CalulateCRC, the Auth func,  and the read and write functions. They work, and it's awesome.
2013-09-23 09:05:06 +02:00

395 lines
12 KiB
Python
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import RPi.GPIO as GPIO
import spi
import signal
class MFRC522:
NRSTPD = 22
MAX_LEN = 16
PCD_IDLE = 0x00
PCD_AUTHENT = 0x0E
PCD_RECEIVE = 0x08
PCD_TRANSMIT = 0x04
PCD_TRANSCEIVE = 0x0C
PCD_RESETPHASE = 0x0F
PCD_CALCCRC = 0x03
PICC_REQIDL = 0x26
PICC_REQALL = 0x52
PICC_ANTICOLL = 0x93
PICC_SElECTTAG = 0x93
PICC_AUTHENT1A = 0x60
PICC_AUTHENT1B = 0x61
PICC_READ = 0x30
PICC_WRITE = 0xA0
PICC_DECREMENT = 0xC0
PICC_INCREMENT = 0xC1
PICC_RESTORE = 0xC2
PICC_TRANSFER = 0xB0
PICC_HALT = 0x50
MI_OK = 0
MI_NOTAGERR = 1
MI_ERR = 2
Reserved00 = 0x00
CommandReg = 0x01
CommIEnReg = 0x02
DivlEnReg = 0x03
CommIrqReg = 0x04
DivIrqReg = 0x05
ErrorReg = 0x06
Status1Reg = 0x07
Status2Reg = 0x08
FIFODataReg = 0x09
FIFOLevelReg = 0x0A
WaterLevelReg = 0x0B
ControlReg = 0x0C
BitFramingReg = 0x0D
CollReg = 0x0E
Reserved01 = 0x0F
Reserved10 = 0x10
ModeReg = 0x11
TxModeReg = 0x12
RxModeReg = 0x13
TxControlReg = 0x14
TxAutoReg = 0x15
TxSelReg = 0x16
RxSelReg = 0x17
RxThresholdReg = 0x18
DemodReg = 0x19
Reserved11 = 0x1A
Reserved12 = 0x1B
MifareReg = 0x1C
Reserved13 = 0x1D
Reserved14 = 0x1E
SerialSpeedReg = 0x1F
Reserved20 = 0x20
CRCResultRegM = 0x21
CRCResultRegL = 0x22
Reserved21 = 0x23
ModWidthReg = 0x24
Reserved22 = 0x25
RFCfgReg = 0x26
GsNReg = 0x27
CWGsPReg = 0x28
ModGsPReg = 0x29
TModeReg = 0x2A
TPrescalerReg = 0x2B
TReloadRegH = 0x2C
TReloadRegL = 0x2D
TCounterValueRegH = 0x2E
TCounterValueRegL = 0x2F
Reserved30 = 0x30
TestSel1Reg = 0x31
TestSel2Reg = 0x32
TestPinEnReg = 0x33
TestPinValueReg = 0x34
TestBusReg = 0x35
AutoTestReg = 0x36
VersionReg = 0x37
AnalogTestReg = 0x38
TestDAC1Reg = 0x39
TestDAC2Reg = 0x3A
TestADCReg = 0x3B
Reserved31 = 0x3C
Reserved32 = 0x3D
Reserved33 = 0x3E
Reserved34 = 0x3F
serNum = []
def __init__(self,spd=1000000):
spi.openSPI(speed=spd)
GPIO.setmode(GPIO.BOARD)
GPIO.setup(22, GPIO.OUT)
GPIO.output(self.NRSTPD, 1)
self.MFRC522_Init()
def MFRC522_Reset(self):
self.Write_MFRC522(self.CommandReg, self.PCD_RESETPHASE)
def Write_MFRC522(self,addr,val):
spi.transfer(((addr<<1)&0x7E,val))
def Read_MFRC522(self,addr):
val = spi.transfer((((addr<<1)&0x7E) | 0x80,0))
return val[1]
def SetBitMask(self, reg, mask):
tmp = self.Read_MFRC522(reg)
self.Write_MFRC522(reg, tmp | mask)
def ClearBitMask(self, reg, mask):
tmp = self.Read_MFRC522(reg);
self.Write_MFRC522(reg, tmp & (~mask))
def AntennaOn(self):
temp = self.Read_MFRC522(self.TxControlReg)
if(~(temp & 0x03)):
self.SetBitMask(self.TxControlReg, 0x03)
def AntennaOff(self):
self.ClearBitMask(self.TxControlReg, 0x03)
def MFRC522_ToCard(self,command,sendData):
backData = []
backLen = 0
status = self.MI_ERR
irqEn = 0x00
waitIRq = 0x00
lastBits = None
n = 0
i = 0
if command == self.PCD_AUTHENT:
irqEn = 0x12
waitIRq = 0x10
if command == self.PCD_TRANSCEIVE:
irqEn = 0x77
waitIRq = 0x30
self.Write_MFRC522(self.CommIEnReg, irqEn|0x80)
self.ClearBitMask(self.CommIrqReg, 0x80)
self.SetBitMask(self.FIFOLevelReg, 0x80)
self.Write_MFRC522(self.CommandReg, self.PCD_IDLE);
while(i<len(sendData)):
self.Write_MFRC522(self.FIFODataReg, sendData[i])
i = i+1
self.Write_MFRC522(self.CommandReg, command)
if command == self.PCD_TRANSCEIVE:
self.SetBitMask(self.BitFramingReg, 0x80)
i = 2000
while True:
n = self.Read_MFRC522(self.CommIrqReg)
i = i - 1
if ~((i!=0) and ~(n&0x01) and ~(n&waitIRq)):
break
self.ClearBitMask(self.BitFramingReg, 0x80)
if i != 0:
if (self.Read_MFRC522(self.ErrorReg) & 0x1B)==0x00:
status = self.MI_OK
if n & irqEn & 0x01:
status = self.MI_NOTAGERR
if command == self.PCD_TRANSCEIVE:
n = self.Read_MFRC522(self.FIFOLevelReg)
lastBits = self.Read_MFRC522(self.ControlReg) & 0x07
if lastBits != 0:
backLen = (n-1)*8 + lastBits
else:
backLen = n*8
if n == 0:
n = 1
if n > self.MAX_LEN:
n = self.MAX_LEN
i = 0
while i<n:
backData.append(self.Read_MFRC522(self.FIFODataReg))
i = i + 1;
else:
status = self.MI_ERR
return (status,backData,backLen)
def MFRC522_Request(self, reqMode):
status = None
backBits = None
TagType = []
self.Write_MFRC522(self.BitFramingReg, 0x07)
TagType.append(reqMode);
(status,backData,backBits) = self.MFRC522_ToCard(self.PCD_TRANSCEIVE, TagType)
if ((status != self.MI_OK) | (backBits != 0x10)):
status = self.MI_ERR
return (status,backBits)
def MFRC522_Anticoll(self):
backData = []
serNumCheck = 0
serNum = []
self.Write_MFRC522(self.BitFramingReg, 0x00)
serNum.append(self.PICC_ANTICOLL)
serNum.append(0x20)
(status,backData,backBits) = self.MFRC522_ToCard(self.PCD_TRANSCEIVE,serNum)
if(status == self.MI_OK):
i = 0
if len(backData)==5:
while i<4:
serNumCheck = serNumCheck ^ backData[i]
i = i + 1
if serNumCheck != backData[i]:
status = self.MI_ERR
else:
status = self.MI_ERR
return (status,backData)
def CalulateCRC(self, pIndata):
self.ClearBitMask(self.DivIrqReg, 0x04)
self.SetBitMask(self.FIFOLevelReg, 0x80);
i = 0
while i<len(pIndata):
self.Write_MFRC522(self.FIFODataReg, pIndata[i])
i = i + 1
self.Write_MFRC522(self.CommandReg, self.PCD_CALCCRC)
i = 0xFF
while True:
n = self.Read_MFRC522(self.DivIrqReg)
i = i - 1
if not ((i != 0) and not (n&0x04)):
break
pOutData = []
pOutData.append(self.Read_MFRC522(self.CRCResultRegL))
pOutData.append(self.Read_MFRC522(self.CRCResultRegM))
return pOutData
def MFRC522_SelectTag(self, serNum):
backData = []
buf = []
buf.append(self.PICC_SElECTTAG)
buf.append(0x70)
i = 0
while i<5:
buf.append(serNum[i])
i = i + 1
pOut = self.CalulateCRC(buf)
buf.append(pOut[0])
buf.append(pOut[1])
(status, backData, backLen) = self.MFRC522_ToCard(self.PCD_TRANSCEIVE, buf)
if (status == self.MI_OK) and (backLen == 0x18):
size = backData[0]
else:
size = 0
return size
def MFRC522_Auth(self, authMode, BlockAddr, Sectorkey, serNum):
buff = []
buff.append(authMode)
buff.append(BlockAddr)
i = 0
while(i < 6):
buff.append(Sectorkey[i])
i = i + 1
i = 0
while(i < 4):
buff.append(serNum[i])
i = i +1
(status, backData, backLen) = self.MFRC522_ToCard(self.PCD_AUTHENT,buff)
if not(status == self.MI_OK):
print "AUTH ERROR!!"
if not(self.Read_MFRC522(self.Status2Reg) & 0x08):
print "AUTH ERROR(status2reg & 0x08 != 0"
def MFRC522_Read(self, blockAddr):
recvData = []
recvData.append(self.PICC_READ)
recvData.append(blockAddr)
pOut = self.CalulateCRC(recvData)
recvData.append(pOut[0])
recvData.append(pOut[1])
(status, backData, backLen) = self.MFRC522_ToCard(self.PCD_TRANSCEIVE, recvData)
if not(status == self.MI_OK):
print "Error while reading!"
print "Got data size: "+str(backLen)
i = 0
if len(backData) == 16:
print "Sector "+str(blockAddr)+" "+str(backData)
def MFRC522_Write(self, blockAddr, writeData):
buff = []
buff.append(self.PICC_WRITE)
buff.append(blockAddr)
crc = self.CalulateCRC(buff)
buff.append(crc[0])
buff.append(crc[1])
(status, backData, backLen) = self.MFRC522_ToCard(self.PCD_TRANSCEIVE, buff)
if not(status == self.MI_OK) or not(backLen == 4) or not((backData[0] & 0x0F) == 0x0A):
status = self.MI_ERR
print str(backLen)+" backdata &0x0F == 0x0A "+str(backData[0]&0x0F)
if status == self.MI_OK:
i = 0
buf = []
while i < 16:
buf.append(writeData[i])
i = i + 1
crc = self.CalulateCRC(buf)
buf.append(crc[0])
buf.append(crc[1])
(status, backData, backLen) = self.MFRC522_ToCard(self.PCD_TRANSCEIVE,buf)
if not(status == self.MI_OK) or not(backLen == 4) or not((backData[0] & 0x0F) == 0x0A):
print "Error while writing"
if status == self.MI_OK:
print "Data writen"
def MFRC522_Init(self):
GPIO.output(self.NRSTPD, 1)
self.MFRC522_Reset();
self.Write_MFRC522(self.TModeReg, 0x8D)
self.Write_MFRC522(self.TPrescalerReg, 0x3E)
self.Write_MFRC522(self.TReloadRegL, 30)
self.Write_MFRC522(self.TReloadRegH, 0)
self.Write_MFRC522(self.TxAutoReg, 0x40)
self.Write_MFRC522(self.ModeReg, 0x3D)
self.AntennaOn()
continue_reading = True
# Capture SIGINT
def end_read(signal,frame):
global continue_reading
print "Ctrl+C captured, ending read."
continue_reading = False
signal.signal(signal.SIGINT, end_read)
MIFAREReader = MFRC522()
while continue_reading:
(status,TagType) = MIFAREReader.MFRC522_Request(MIFAREReader.PICC_REQIDL)
if status == MIFAREReader.MI_OK:
print "Card detected"
(status,backData) = MIFAREReader.MFRC522_Anticoll()
if status == MIFAREReader.MI_OK:
print "Card read UID: "+str(backData[0])+","+str(backData[1])+","+str(backData[2])+","+str(backData[3])+","+str(backData[4])
MIFAREReader.MFRC522_SelectTag(backData)
key = [0xFF,0xFF,0xFF,0xFF,0xFF]
MIFAREReader.MFRC522_Auth(0x60,0,keyA,backData)
MIFAREReader.MFRC522_Read(0)
i = 1
while i < 64:
MIFAREReader.MFRC522_Auth(0x60,i,keyA,backData)
MIFAREReader.MFRC522_Read(i)
i = i + 1
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