pyserial 實現串口log過濾

經常遇到下位機平臺大量輸出log，導致快速刷屏，看不清自己所關注的信息
寫了一個腳本，可以設置white list 和black list，根據關鍵字，實現過濾log，清爽屏幕的功能

代碼

#!/usr/bin/python
# -*-coding: utf-8 -*-

import serial
import serial.tools.list_ports
import threading
import binascii
import time
from datetime import datetime

# config
baunRate = 115200
is_exit=False
data_bytes = bytearray()


#列出所有當前的com口
port_list = list(serial.tools.list_ports.comports())
port_list_name = []

class SerialPort:
    def __init__(self,port,buand):
        self.port = serial.Serial(port,buand)
        self.port.close()
        if not self.port.isOpen():
            self.port.open()

    def port_open(self):
        if not self.port.isOpen():
            self.port.open()

    def port_close(self):
        self.port.close()

    def send_data(self):
        #此處可以發送命令，暫未實現
        self.port.write("hello")

    def read_data(self):
        global is_exit
        global data_bytes
        while not is_exit:
            count = self.port.inWaiting()
            if count > 0:
                rec_str = self.port.read(count)
                data_bytes = data_bytes+rec_str
                #print("receive:",rec_str.decode())

def show_all_com():
    if len(port_list) <= 0:
        print("the serial port can't find!")
    else:
        for itms in port_list:
            port_list_name.append(itms.device)


def filter_policy(white_list = None,black_list=None,line=None):

    if line == None:
        return False

    if not white_list == None:
        for each in white_list:
            if each in line:
                return True

    if not black_list == None:
        for each in black_list:
            if each in line:
                return False
    #default return True
    return True


if __name__ == '__main__':
    print("1.list all com")
    show_all_com()
    print(port_list_name)

    print("2.open ",port_list_name[0])
    #config other com , eg: serialPort_r = "COM5"
    serialPort_r = port_list_name[0]
    mSerial_r = SerialPort(serialPort_r,baunRate)

    print("3.start thread: read from thread")
    t2 = threading.Thread(target=mSerial_r.read_data)
    t2.setDaemon(True)
    t2.start()

    print("6.init white list and black list")
    # config your filter key words, eg: b_list.append("hello")"
    b_list = []
    b_list.append("app")

    w_list = []
    w_list.append("bt")

    i = 0
    #標記一行字符的起始索引值
    line_head = 0
    while not is_exit:
        data_len = len(data_bytes)
        line = []
        while (i < data_len -1):
            #print(data_bytes[i])
            if(data_bytes[i] == 0x0a):
                #換行
                line = data_bytes[line_head:i].decode()
                line_head = i+1
                if filter_policy(white_list=w_list,black_list=b_list,line=line):
                    print(line)
            i += 1

說明：

1. 是否過濾，在def filter_policy(white_list = None,black_list=None,line=None)定義，默認的邏輯是，所有白名單裏面的log，都輸出，在黑名單中但是不在白名單中的log不輸出，既不在白名單，也不在黑名單中的log默認輸出
2. 需要根據下位機實際情況配置com 口，波特率等信息，可以查看code 註釋config 位置