本文整理匯總了Python中crc_algorithms.Crc.bit_by_bit_fast_array方法的典型用法代碼示例。如果您正苦於以下問題：Python Crc.bit_by_bit_fast_array方法的具體用法？Python Crc.bit_by_bit_fast_array怎麽用？Python Crc.bit_by_bit_fast_array使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類crc_algorithms.Crc的用法示例。
在下文中一共展示了Crc.bit_by_bit_fast_array方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Python代碼示例。
示例1: __init__
# 需要導入模塊: from crc_algorithms import Crc [as 別名]
# 或者: from crc_algorithms.Crc import bit_by_bit_fast_array [as 別名]
class GatewayInterface:
def __init__(self, port, queue):
import sys
sys.path.append('.\pycrc-0.7.7')
import threading
from crc_algorithms import Crc
import serial
self.xport_serial = serial.Serial(port, 115200, timeout=5.0)
self.crc = Crc(width = 16, poly = 0x1021, reflect_in = True, xor_in = 0xffff, reflect_out = False, xor_out = 0x0000)
self.reading = threading.Event()
"""
We spawn a new thread for the worker.
"""
self.queue = queue
# Set up the thread to do asynchronous I/O
# More can be made if necessary
self.running = 1
self.thread1 = threading.Thread(target=self.worker_thread)
self.thread1.start()
def stop(self):
self.running = 0
self.reading.wait(5.0)
self.xport_serial.close()
def get_msg(self, queue):
self.reading.clear()
raw_msg = bytearray()
raw_msg.extend(self.xport_serial.read(1))
if len(raw_msg) > 0:
print("MSG RECV", raw_msg[0])
try:
msg = msg_id_dict[raw_msg[0]]()
except KeyError:
print("Unkown msg", raw_msg[0])
else:
#Success
raw_msg.extend(self.xport_serial.read(1))
raw_msg.extend(self.xport_serial.read(raw_msg[1]-2))
#parse msg
msg.parse_raw(raw_msg)
#remove crc bytes for end of raw and then calc crc
calc_crc = self.crc.bit_by_bit_fast_array(raw_msg[0:len(raw_msg) - 2])
#response
resp_msg = bytearray(2)
resp_msg[0] = 0x80 | raw_msg[0]
if(calc_crc == msg.recv_crc):
resp_msg[1] = 0xA5
queue.put(msg)
else:
print("CRC fail")
resp_msg[1] = 0x00
#send resp is expected
if(msg.Response() == True):
write_len = self.xport_serial.write(resp_msg)
print("RESP_MSG: len", len(resp_msg), write_len, resp_msg)
self.reading.set()
return True
self.reading.set()
return False
def worker_thread(self):
"""
This is where we handle the asynchronous I/O. For example, it may be
a 'select()'.
One important thing to remember is that the thread has to yield
control.
"""
while self.running:
if self.get_msg(self.queue) == False:
print("Timeout waiting for read")
"""