Can you separate the parameters in setPortParameters into multiple functions?

[vnlevanduoc]

I have a python code like this

import time
import binascii
import datetime

s = None
password = "FEDC0003"         #default password level 2 ABCD0002

def open():
    global s

    s = serial.Serial()
    s.port = "COM4"
    s.baudrate = 300
    s.bytesize = serial.SEVENBITS           #number of bits per bytes
    s.parity = serial.PARITY_EVEN           #set parity check: EVEN
    s.stopbits = serial.STOPBITS_ONE        #number of stop bits
    s.timeout = 1.5                         #non-block read
    s.xonxoff = False                       #disable software flow control
    s.rtscts = False                        #disable hardware (RTS/CTS)
    try:
        s.open()
        print ('{:%Y-%m-%d %H:%M:%S}'.format(datetime.datetime.now()) + '   ###   :' + 'Begining communication')
    except Exception as e:
        print ("Error attemping to open serial port: " + str(e))
        exit()

def printLine(message, dir):
    if type(message) != "str":
        message = str(message)
    m2 = ""
    for m in message:
        c = m #binascii.hexlify(m)
        if c == "01":
            m2 += '<SOH>'
        elif c == "02":
            m2 += '<STX>'
        elif c == "03":
            m2 += '<ETX>'
        elif c == "0a":
            m2 += '<LF>'
        elif c == "0d":
            m2 += '<CR>'
        elif c == "06":
            m2 += '<ACK>'
        elif c == "15":
            m2 += '<NAK>'
        else:
            m2 += m

    print(dir + " " + m2)

    if dir == "RX":
        print("")

def getLine():
    res = []
    while True:
        c = s.read()
        if not c: break
        res.append(c)
    res = b''.join(res)
    print('{:%Y-%m-%d %H:%M:%S}'.format(datetime.datetime.now()) + '   <<<   : ' + res.decode('utf-8'))
    return res

def sendLine(message):
    s.write(message)
    printLine(message, 'TX')

def getId():
    message = bytearray(b'\x2F\x3F\x21\x0D\x0A')    #Sends command: /?!<CR><LF> to begin communication
    sendLine(message)
    return getLine()

def HangUp():
    message = bytearray(b'\x01\x42\x30\x03\x71')    #Sends command: /?!<CR><LF> to begin communication
    sendLine(message)
    return getLine()

def modeSwitchRequest():
    message = bytearray(b'\x06\x30\x35\x31\x0D\x0A')
    s.write(message)
    time.sleep(0.2)     #Waits to send the whole message before changing port setup.
    s.baudrate = 9600
    return getLine()

def decryptA1700(seed, password):
    crypted = bytearray(b'\x00\x00\x00\x00\x00\x00\x00\x00')
    password = bytearray(password, 'ascii')

    for i in range (0, 8):
        crypted[i]= password[i] ^ seed[i]
    last = crypted[7]
    for i in range (0, 8):
        crypted[i] = (crypted[i] + last) & 0xFF
        last = crypted[i]

    crypted = (binascii.hexlify(crypted)).swapcase()
    return crypted

##########################################################  
open()

identidad = getId()

if identidad:
    seed = modeSwitchRequest()

    _str =  str(seed[5:21])
    seed = bytearray.fromhex(seed[5:21].decode())

    pw = decryptA1700(seed, password)

    #   Send hashed password
    message = bytearray(b'\x50\x32\x02\x28')
    message.extend(pw)
    message.extend(b'\x29\x03')

    send = bytearray(b'\x01')
    send.extend(message)
    send.append(getCRC(message))

    sendLine(send)
    response = getLine()

    if response != b"\x06":
        print("Invalid response")
        HangUp()

    #   Request reading
    #message = bytearray(b'\x01\x52\x31\x02\x35\x30\x37\x30\x30\x31\x28\x34\x30\x29\x03\x64')
    message = bytearray(b'\x01\x52\x31\x02\x36\x38\x30\x30\x30\x31\x28\x31\x36\x29\x03\x6B')

    sendLine(message)
    response = getLine()

    message = bytearray(b'\x01\x52\x31\x02\x35\x30\x37\x30\x30\x31\x28\x34\x30\x29\x03\x64')
    sendLine(message)
    response = getLine()

    # print("Import:" + mImport)
    print(response)

HangUp()

s.close()```

###########end############################################################
Notice how this modeSwitchRequest function has reset the baudrate value

I have moved the above python code to the dart but to the _modeSwitchRequest function it returns nothing

I adjust the _modeSwitchRequest function again as follows

```  Future<String> _modeSwitchRequest() async {
    _port.write(Uint8List.fromList([0x06,0x30,0x35,0x31,0x0D,0x0A]));
    _port.write(Uint8List.fromList([0x0A]));
    await _port.setPortParameters(9600, UsbPort.DATABITS_7, UsbPort.STOPBITS_1, UsbPort.PARITY_EVEN);
    return "";
  }```

Can you separate the parameters in setPortParameters into multiple functions?

because it depends on the needs and timing, I do not always put it like that

[altera2015]

Is this still an issue you need?