def SetPollingDalay(fd):
# set the polling delay for the reader
print ("Setting Polling delay .......")
WaitForCTS()
wiringpi2.serialPutchar(fd, 0x50)
wiringpi2.serialPutchar(fd, 0x00)
# various polling delays possible, standard one uncommented
#wiringpi2.serialPutchar(fd, 0x00) # 0x00 is no delay
#wiringpi2.serialPutchar(fd, 0x20) # 0x20 is approx 20ms
#wiringpi2.serialPutchar(fd, 0x40) # 0x40 is approx 65ms
wiringpi2.serialPutchar(fd, 0x60) # 0x60 is approx 262ms
#wiringpi2.serialPutchar(fd, 0x80) # 0x60 is approx 1 Seconds
#wiringpi2.serialPutchar(fd, 0xA0) # 0x60 is approx 4 Seconds
time.sleep(0.1)
ans = ReadInt(fd)
# print ("Tag Status: %s" % hex(ans)) # Added for Debug Purposes
if ans == int("0xC0", 16):
# C0 is a positive result
print ("Polling delay changed ......")
else:
print ("Unexpected response %s" % hex(ans))
# flush any remaining characters from the buffer
wiringpi2.serialFlush(fd)
return
def ChangeReaderOpMode(fd):
# prvide an additional menu to choose the type of tag to be read and set the reader accordingly
print ("Setting Reader Operating Tag Mode.......")
desc = ""
choice = ""
while choice == "":
print ("*********************************************")
print ("a - Hitag H2")
print ("b - Hitag H1/S (factory default)")
print ("c - EM/MC2000")
# promt the user for a choice
choice = input("Please select tag type .....:")
# print ("choice: %s" % choice) # Added for Debug purposes
if choice =="a" or choice == "A":
desc = "Hitag H2"
WaitForCTS()
wiringpi2.serialPutchar(fd, 0x76)
wiringpi2.serialPutchar(fd, 0x01) # 0x01 = H2
elif choice =="b" or choice == "B":
desc = "Hitag H1/S"
WaitForCTS()
wiringpi2.serialPutchar(fd, 0x76)
wiringpi2.serialPutchar(fd, 0x02) # 0x01 = H1/S
elif choice =="c" or choice == "C":
desc = "Em / MC2000"
WaitForCTS()
wiringpi2.serialPutchar(fd, 0x76)
wiringpi2.serialPutchar(fd, 0x03) # 0x03 = EM/MC2000
else:
print ("Invalid option. Please try again...")
choice = ""
time.sleep(0.1)
ans = ReadInt(fd)
# print ("Tag Status: %s" % hex(ans)) #Added for Debug purposes
if ans == int("0xC0", 16):
# Positive result
print ("Reader Operating Mode %s ......" % desc)
else:
print ("Unexpected response %s" % hex(ans))
# clear the buffer
wiringpi2.serialFlush(fd)
def RFIDSetup():
# setup up the serial port and the wiringpi software for use
# call setup for the wiringpi2 software
response = wiringpi2.wiringPiSetup()
# set the GPIO pin for input
wiringpi2.pinMode(GPIO_PIN, 0)
# open the serial port and set the speed accordingly
fd = wiringpi2.serialOpen('/dev/serial0', 9600)
# clear the serial buffer of any left over data
wiringpi2.serialFlush(fd)
if response == 0 and fd >0:
# if wiringpi is setup and the opened channel is greater than zero (zero = fail)
print ("PI setup complete on channel %d" %fd)
else:
print ("Unable to Setup communications")
sys.exit()
return fd
def SetupUART():
"""
Setup the UART for communications and return an object referencing it. Does:-
-Initiates wiringpi software
-Opens the serial port
-Checks all is ok and returns the object
"""
response = wiringpi.wiringPiSetup()
# open the serial port and set the speed accordingly
sp = wiringpi.serialOpen('/dev/ttyAMA0', 9600)
# clear the serial buffer of any left over data
wiringpi.serialFlush(sp)
if response == 0 and sp > 0:
# if wiringpi is setup and the opened channel is greater than zero (zero = fail)
logging.info("PI setup complete on channel %d" % sp)
else:
logging.critical("Unable to Setup communications")
sys.exit()
return sp
