python 串口编程

import binascii

import sys

import threading

import serial  # 导入模块

import serial.tools.list_ports

STRGLO="" #读取的数据

BOOL=True  #读取标志位

def get_serial_port_list():

    m_port_list = list(serial.tools.list_ports.comports())

    

    if len(m_port_list) <= 0:

        print("The Serial port can't find!")

        sys.exit(0)

        

    print()

    for i in range (len(m_port_list)):

        print("{}:{}".format(i,m_port_list[i]))

    print()

    return m_port_list

   

def get_num(info,max_limt):

    while True:

        print(info,",按 q 结束程序，按 s 跳过输入")

        instr = input("请输入>") 

        print()  

        if instr == "q":

            sys.exit(0)

        elif instr == "s":

            return ''

        elif instr.isdigit():

            num = int(instr)

            if num <= max_limt:

                return num

        print("输入有误请重新输入")

        

def Readstr(ser):

    global STRGLO,BOOL

    # 循环接收数据，此为死循环，可用线程实现

    while BOOL:

        if ser.in_waiting:

            STRGLO = ser.read(ser.in_waiting).decode("gbk")

            print(STRGLO)

def WriteString(ser,st):

    s = st.encode()

    result=ser.write(s)

    return result

def WriteHexString(ser,hex_string):

    s = binascii.unhexlify(hex_string)

    result=ser.write(s)

    return result

def WriteHex(ser,hex_data):

    result=ser.write(hex_data)

    return result

def ReadString(ser):

    pass

def ReadHexString(ser,hex_data):

    # binascii.b2a_hex(hex_data)

    pass

def ReadHex(ser):

    pass

def getbord_addr(module_num):

    if(module_num  > 0):

        bord = '0'+str(int((module_num-1)/4)+1)

        cnt_mask = '0'+str(1<<(module_num-1)%4)

        return bord,cnt_mask

    return "00","00"

if __name__ == "__main__":

    port_list = get_serial_port_list()

    port_index = get_num("请选择串口",100)

    if(port_index != ""):

        ser = serial.Serial(port_list[port_index].device,9600,timeout = 60)

        while True:

            module_num = get_num("请输入模组编号",16)

            if(module_num != ""):

                if(module_num == 0):

                    cmdLine = "A5{}{}{}{}AA".format("ff","A3","01","00")

                    print(cmdLine)

                    WriteHexString(ser,cmdLine)

                else:

                    b,c = getbord_addr(module_num)

                    cmdLine = "A5{}{}{}{}AA".format(b,"A2","01",c)

                    print(cmdLine)

                    WriteHexString(ser,cmdLine)