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from fido2.pcsc import CtapPcscDevice
import time
class Acr122uPcscDevice(object):
def __init__(self, pcsc_device):
self.pcsc = pcsc_device
def reader_version(self):
"""
Get reader's version from reader
:return: string. Reader's version
"""
try:
result, sw1, sw2 = self.pcsc.apdu_exchange(b"\xff\x00\x48\x00\x00")
if len(result) > 0:
str_result = result + bytes([sw1]) + bytes([sw2])
str_result = str_result.decode("utf-8")
return str_result
except Exception as e:
print("Get version error:", e)
return "n/a"
def led_control(
self,
red=False,
green=False,
blink_count=0,
red_end_blink=False,
green_end_blink=False,
):
"""
Reader's led control
:param red: boolean. red led on
:param green: boolean. green let on
:param blink_count: int. if needs to blink value > 0. blinks count
:param red_end_blink: boolean.
state of red led at the end of blinking
:param green_end_blink: boolean.
state of green led at the end of blinking
:return:
"""
try:
if blink_count > 0:
cbyte = (
0b00001100
+ (0b01 if red_end_blink else 0b00)
+ (0b10 if green_end_blink else 0b00)
)
cbyte |= (0b01000000 if red else 0b00000000) + (
0b10000000 if green else 0b00000000
)
else:
cbyte = 0b00001100 + (0b01 if red else 0b00) + (0b10 if green else 0b00)
apdu = (
b"\xff\x00\x40"
+ bytes([cbyte & 0xFF])
+ b"\4"
+ b"\5\3"
+ bytes([blink_count])
+ b"\0"
)
self.pcsc.apdu_exchange(apdu)
except Exception as e:
print("LED control error:", e)
dev = next(CtapPcscDevice.list_devices())
print("CONNECT: %s" % dev)
pcsc_device = Acr122uPcscDevice(dev)
pcsc_device.led_control(False, True, 0)
print("version: %s" % pcsc_device.reader_version())
pcsc_device.led_control(True, False, 0)
time.sleep(1)
pcsc_device.led_control(False, True, 3)
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