Matlab serial communication cannot be entered BreakInterruptFcn event

Hello everyone, I encountered a problem when doing matlab serial communication. My lower computer sends a signal every 200m, but I set the BreakInterruptFcn function and failed to trigger the callback function. The matlab document explanation of BreakInterruptFcn is:You configure BreakInterruptFcn to execute an M-file callback function when a break-interrupt event occurs. A break-interrupt event is generated by the serial port when the received data is in an off (space) state longer than the transmission time for one byte.

Can anyone tell me the trigger conditions of BreakInterruptFcn or how to trigger BreakInterruptFcn?

The properties of my serial port object are：

get(ControlObj)

ByteOrder = littleEndian

BytesAvailable = 0

BytesAvailableFcn = [1x1 function_handle]

BytesAvailableFcnCount = 30

BytesAvailableFcnMode = byte

BytesToOutput = 0

ErrorFcn =

InputBufferSize = 1500

Name = Serial-COM3

ObjectVisibility = on

OutputBufferSize = 1500

OutputEmptyFcn = [1x1 function_handle]

RecordDetail = compact

RecordMode = overwrite

RecordName = record.txt

RecordStatus = off

Status = closed

Tag =

Timeout = 1

TimerFcn =

TimerPeriod = 1

TransferStatus = idle

Type = serial

UserData = []

ValuesReceived = 0

ValuesSent = 0

SERIAL specific properties:

BaudRate = 9600

BreakInterruptFcn = [1x1 function_handle]

DataBits = 8

DataTerminalReady = on

FlowControl = none

Parity = none

PinStatus = [1x1 struct]

PinStatusFcn =

Port = COM3

ReadAsyncMode = continuous

RequestToSend = on

StopBits = 1

Terminator = CR

Can anyone help me, thanks in advance！！！

Answer 1

[hui wang]

is connect with RS232