串口通信，接收几次字符串（如1 1 1 1 1 1 1 0.3 0.7 0.2 0.1）以后报错

Question

问题遇到的现象

用的是虚拟串口，xcom的com2发送几次，电脑com1接收几次字符串（如1 1 1 1 1 1 1 0.3 0.7 0.2 0.1）以后报错，

这是我的代码

import serial             
import threading
from time import sleep

def recv(serial):
    while True:
        data = serial.read_all().decode()  # str
        if data == '':
            continue
        else:
            break
       
    return data

def COM1():                                                    
    if __name__ == '__main__':                                         
        serial1 = serial.Serial('COM1', 115220, timeout=0.5)
    if serial1.isOpen():
        print("COM1 open success")
    else:
        print("COM1 open failed")
    while True:
        data1 = recv(serial1)
        DATA1=data1.split()
        KG01=int(DATA1[0])
        KG02=int(DATA1[1])
        KG03=int(DATA1[2])
        KG04=int(DATA1[3])
        KG05=int(DATA1[4])
        KGLL=int(DATA1[5])
        KGRR=int(DATA1[6])
        X1=float(DATA1[7])
        Y1=float(DATA1[8])
        X2=float(DATA1[9])
        Y2=float(DATA1[10])
        
        
        
        Z11=float()                        
        Y11=float()                               
        Z22=float()
        Y22=float()
        
        X11=-Y1
        if KGLL==0:
            Z11=-X1
            Y11=0
        if KGLL==1:
            Y11=-X1
            Z11=0
        ZD=[X11,Y11,Z11]
        print(ZD)


        X22=X1
        if KGRR==0:
            Z22=0
            Y22=Y2
        if KGRR==1:
            Y22=0
            Z22=-Y2
        YD=[X22,Y22,Z22]
        print(YD)





def COM3():
    if __name__ == '__main__':
        serial3 = serial.Serial('COM3',115200 , timeout=0.5)
    if serial3.isOpen():
        print("COM3 open success")
    else:
        print("COM3 open failed")
    while True:
        data3 = recv(serial3)
        CR=data3.split()
        print(CR[0])
        print(CR[1])# str  

        
thread1 = threading.Thread(name='t1',target= COM1)
thread2 = threading.Thread(name='t2',target= COM3)
thread1.start()#启动线程1
thread2.start()#启动线程2

这边是报错

COM1 open success

COM3 open success
[-0.7, -0.3, 0]
[0.3, 0, -0.1]
[-0.7, -0.3, 0]
[0.3, 0, -0.1]
Exception in thread t1:
Traceback (most recent call last):
File "C:\ProgramData\Anaconda3\lib\threading.py", line 973, in _bootstrap_inner
self.run()
File "C:\ProgramData\Anaconda3\lib\threading.py", line 910, in run
self._target(*self._args, **self._kwargs)
File "C:\Users\lrc\AppData\Local\Temp/ipykernel_12376/1791913573.py", line 35, in COM1
IndexError: list index out of range

Answer 1

COM1线程函数里，数组越界了
print(data1)
查看一下接收的data1数据是多少，字符串切割后，数组里有11个元素吗？