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rfid.py
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rfid.py
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import sys
import serial
from os import system
import time
import struct
keyA = [0xff] * 6
echoCmd = [0xaa, 0xbb, 0x9, 0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7]
beepCmd = [0xaa, 0xbb, 0x3, 0x14, 0x13]
cardIDCmd = [0xaa, 0xbb, 0x2, 0x20]
cardSleepCmd = [0xaa, 0xbb, 0x02, 0x12]
cardTypeCmd = [0xaa, 0xbb, 0x02, 0x19]
blockReadCmd = [
0xaa, 0xbb, 0x0a, 0x21, 0x00, 0x00,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff]
blockWriteCmd = [
0xaa, 0xbb, 0x1a, 0x22, 0x00, 0x08,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xab, 0xcd, 0xef, 0x01, 0x23, 0x45, 0x67, 0x89,
0xDE, 0xAD, 0xBE, 0xFF, 0xDE, 0xAD, 0xBE, 0xFF]
valueInitCmd = [
0xaa, 0xbb, 0x0e, 0x23, 0x00, 0x08,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0x00, 0x00, 0x04, 0x00]
valueReadCmd = [
0xaa, 0xbb, 0x0a, 0x24, 0x00, 0x08,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff]
valueIncCmd = [
0xaa, 0xbb, 0x0e, 0x25, 0x00, 0x08,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0x00, 0x00, 0x04, 0x00]
valueDecCmd = [
0xaa, 0xbb, 0x0e, 0x26, 0x00, 0x08,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0x00, 0x00, 0x04, 0x00]
sectorReadCmd = [
0xaa, 0xbb, 0x0a, 0x2a, 0x00, 0x01,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff]
sectorWriteCmd = [
0xaa, 0xbb, 0x3a, 0x2b, 0x00, 0x01,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11,
0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22,
0x33, 0x33, 0x33, 0x33, 0x33, 0x33, 0x33, 0x33]
reply = []
ERR_CHKSUM = 0
ERR_INPUT = 1
ERR_COMM = 2
# for windows
#s = serial.Serial("COM20", baudrate=19200)
# for linux
s = serial.Serial("/dev/ttyUSB0", baudrate=19200)
def process(cmd):
if(len(cmd) < 3):
return cmd
newCmd = cmd[0:2]
for ch in cmd[2:]:
newCmd.append(ch)
if(ch == 0xaa):
newCmd.append(0x00)
return newCmd
def processInv(cmd):
if(len(cmd) < 3):
return cmd
newCmd = cmd[0:2]
aaOccurred = False
for ch in cmd[2:]:
if(aaOccurred):
aaOccurred = False
continue
newCmd.append(ch)
if(ch == 0xaa):
aaOccurred = True
return newCmd
def sendCmd(cmd):
time.sleep(0.1)
flush()
csum = 0
cmd = process(cmd)
for c in cmd:
s.write(chr(c))
csum = csum ^ c
csum = csum ^ 0xaa ^ 0xbb
s.write(chr(csum))
reply = []
prevTime = time.time()
while(s.inWaiting() < 1) :
if(time.time() - prevTime > 1):
sys.stdout.write("Timeout")
return
csum = 0
while(s.inWaiting() > 0):
while(s.inWaiting() > 0):
r = s.read()
reply.append(ord(r))
csum = csum ^ ord(r)
time.sleep(0.05)
csum = csum ^ 0xaa ^ 0xbb
if(csum != 0):
sys.stdout.write("Checksum incorrect")
return reply
def check(response):
if(len(response) < 4):
sys.stdout.write("Invalid response")
return False
csum = 0
for c in response[2:]:
csum = csum ^ c
if(csum != 0):
return False
return True
def sendCmdD(cmd):
sys.stdout.write("Command to READER: ")
csum = 0
cmd = process(cmd)
for c in cmd:
s.write(chr(c))
csum = csum ^ c
sys.stdout.write(hex(c) + " ")
csum = csum ^ 0xaa ^ 0xbb
s.write(chr(csum))
sys.stdout.write(hex(csum) + "\n")
sys.stdout.write("Reply from READER: ")
reply = []
time.sleep(0.1)
prevTime = time.time()
while(s.inWaiting() < 1) :
if(time.time() - prevTime > 1):
dualWrite("Response timed out\n")
f.close()
return
while(s.inWaiting() > 0):
r = s.read()
sys.stdout.write(hex(r) + " ")
reply.append(r)
sys.stdout.write("\n")
f.close()
def flush():
reply = []
for c in range(s.inWaiting()):
r = s.read()
reply.append(r)
sys.stdout.write(''.join([hex(ord(c)) for c in reply]))
def readCardID():
ret = []
reply = processInv(sendCmd(cardIDCmd))
if(not check(reply)):
ret = [-1, ERR_CHKSUM]
elif(reply[2] == 0x06):
ret = [1] + reply[4:8]
else:
ret = [-1, ERR_COMM]
return ret
def sleepCard():
ret = []
reply = processInv(sendCmd(cardSleepCmd))
if(not check(reply)):
ret = [-1, ERR_CHKSUM]
elif(reply[3] == 0x12):
ret = [1]
else:
ret = [-1, ERR_COMM]
return ret
def readBlock(blockNum):
ret = []
sys.stdout.write("Read block " + hex(blockNum) + "\n")
cmd = blockReadCmd[0:5] + [blockNum] + blockReadCmd[6:12]
reply = processInv(sendCmd(cmd))
if(not check(reply)):
sys.stdout.write("Checksum Incorrect")
ret = [-1, ERR_CHKSUM]
elif(reply[2]== 0x02):
sys.stdout.write("Read Failed")
ret = [-1, ERR_COMM]
else:
sys.stdout.write("Result : ")
for c in reply[4:-1]:
sys.stdout.write(hex(c) + " ")
ret = [1] + reply[4:-1]
sys.stdout.write("\n")
return ret;
def readSector(sectorNum):
ret = []
sys.stdout.write("Read sector " + hex(sectorNum) + "\n")
cmd = sectorReadCmd[0:5] + [sectorNum] + sectorReadCmd[6:]
reply = processInv(sendCmd(cmd))
if(not check(reply)):
sys.stdout.write("Checksum Incorrect")
ret = [-1, ERR_CHKSUM]
elif(reply[2]== 0x02):
sys.stdout.write("Read Failed")
ret = [-1, ERR_COMM]
else:
sys.stdout.write("Result : ")
for c in reply[5:-1]:
sys.stdout.write(hex(c) + " ")
ret = [1] + reply[5:-1]
sys.stdout.write("\n")
return ret;
def writeBlock(blockNum, data):
ret = [-1]
sys.stdout.write('Writing to block ' + hex(blockNum) + ', \ndata : ')
for c in data:
sys.stdout.write(hex(c) + ' ')
sys.stdout.write('\n')
if(len(data) != 16):
sys.stdout.write('invalid data length : ' + str(len(data)) + '\n')
ret = [-1, ERR_INPUT]
return ret
cmd = blockWriteCmd[0:5] + [blockNum] + blockWriteCmd[6:12] + data
reply = processInv(sendCmd(cmd))
if(not check(reply)):
sys.stdout.write("Checksum Incorrect")
ret = [-1, ERR_CHKSUM]
elif(reply[3] == 0x22):
sys.stdout.write("Write successful")
ret = [1]
elif(reply[3] == 0xDD):
sys.stdout.write("Write Failed")
ret = [-1, ERR_COMM]
sys.stdout.write("\n")
return ret
def writeSector(sectorNum, data):
ret = [-1]
sys.stdout.write('Writing to sector ' + hex(sectorNum) + ', \ndata : ')
for c in data:
sys.stdout.write(hex(c) + ' ')
sys.stdout.write('\n')
if(sectorNum <= 0x20 and len(data) != 48):
sys.stdout.write('invalid data length : ' + str(len(data)) + '\n')
ret = [-1, ERR_INPUT]
return ret
elif(sectorNum > 0x20 and sectorNum <= 0x29 and len(data) != 240):
sys.stdout.write('invalid data length : ' + str(len(data)) + '\n')
ret = [-1, ERR_INPUT]
return ret
cmd = sectorWriteCmd[0:5] + [sectorNum] + sectorWriteCmd[6:12] + data
reply = processInv(sendCmd(cmd))
if(not check(reply)):
sys.stdout.write("Checksum Incorrect")
ret = [-1, ERR_CHKSUM]
elif(reply[3] == 0x2B):
sys.stdout.write("Write successful")
ret = [1]
elif(reply[3] == 0xD4):
sys.stdout.write("Write Failed")
ret = [-1, ERR_COMM]
sys.stdout.write("\n")
return ret
def initValue(blockNum, value):
cmd = valueInitCmd[0:5] + [blockNum] + valueInitCmd[6:12] + [ord(ch) for ch in struct.pack('I',value)[0:4]]
reply = processInv(sendCmd(cmd))
sys.stdout.write('Writing value to block ' + hex(blockNum) + ', value : ' + str(value) + '\n')
ret = []
if(not check(reply)):
sys.stdout.write("Checksum Incorrect")
ret = [-1, ERR_CHKSUM]
elif(reply[3] == 0x23):
sys.stdout.write("Write successful")
ret = [1]
elif(reply[3] == 0xDC):
sys.stdout.write("Write Failed")
ret = [-1, ERR_COMM]
sys.stdout.write("\n")
return ret
def readValue(blockNum):
cmd = valueReadCmd[0:5] + [blockNum] + valueReadCmd[6:]
reply = processInv(sendCmd(cmd))
sys.stdout.write('Reading value from block ' + hex(blockNum) + '\n')
val = -1
ret = []
if(not check(reply)):
sys.stdout.write("Checksum Incorrect")
ret = [-1, ERR_CHKSUM]
elif(reply[2] == 0x02):
sys.stdout.write("Read Failed")
ret = [-1, ERR_COMM]
else:
val = struct.unpack('I',''.join([chr(c) for c in reply[4:8]]))[0]
sys.stdout.write("Value = " + str(val))
ret = [1, val]
sys.stdout.write("\n")
return ret
def incValue(blockNum, value):
cmd = valueIncCmd[0:5] + [blockNum] + valueIncCmd[6:12] + [ord(ch) for ch in struct.pack('I',value)[0:4]]
reply = processInv(sendCmd(cmd))
sys.stdout.write('Increasing value in block ' + hex(blockNum) + ', amount : ' + str(value) + '\n')
ret = []
if(not check(reply)):
sys.stdout.write("Checksum Incorrect")
ret = [-1, ERR_CHKSUM]
elif(reply[3] == 0x25):
sys.stdout.write("Increment successful")
ret = [1]
elif(reply[3] == 0xDA):
sys.stdout.write("Increment Failed")
ret = [-1, ERR_COMM]
sys.stdout.write("\n")
return ret
def decValue(blockNum, value):
cmd = valueDecCmd[0:5] + [blockNum] + valueDecCmd[6:12] + [ord(ch) for ch in struct.pack('I',value)[0:4]]
reply = processInv(sendCmd(cmd))
sys.stdout.write('Decreasing value in block ' + hex(blockNum) + ', amount : ' + str(value) + '\n')
ret = [-1]
if(not check(reply)):
sys.stdout.write("Checksum Incorrect")
ret = [-1, ERR_CHKSUM]
elif(reply[3] == 0x26):
sys.stdout.write("Write successful")
ret = [1]
elif(reply[3] == 0xD9):
sys.stdout.write("Write Failed")
ret = [-1, ERR_COMM]
sys.stdout.write("\n")
return ret