Error occurred while executing the listener callback for event DataWritten defined for class asyncio.InputStream

Question

Sugandh Pratap Singh 2022-2-11

0
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https://ww2.mathworks.cn/matlabcentral/answers/1647630-error-occurred-while-executing-the-listener-callback-for-event-datawritten-defined-for-class-asyncio

评论： ryan mao 2024-8-5

采纳的回答： Sugandh Pratap Singh

在 MATLAB Online 中打开

Hi,

I am reading data over TCP/IP from hardware device using

t1=tcpclient("xxxx",xxxx)

I am configuring callback function, so that when ever 210 data byes avaible to read function1() execute.

while t1.BytesAvailable == 0
    %wait for data 
end
configureCallback(t1,"byte",210,@varargin()function1())
function  function1()    
Bytes_DATAF1=t1.NumBytesAvailable
    DATA=read(t1,210);
    decode=swapbytes(typecast(uint8(DATAF1(1,7:10)'),'uint32'));
    Bytes_DATAF2=t1.NumBytesAvailable
end

codes doing fine but in middle giving following warning.

Warning: Error occurred while executing the listener callback for event DataWritten

defined for class asyncio.InputStream:

Error using +

Integers can only be combined with integers of the same class, or scalar doubles.

Error in matlabshared.network.internal.TCPClient/onDataReceived

Error in

matlabshared.network.internal.TCPClient>@(varargin)obj.onDataReceived(varargin{:})

Error in asyncio.Channel/onDataReceived (line 487)

notify(obj.InputStream, 'DataWritten', ...

Error in asyncio.Channel>@(source,data)obj.onDataReceived() (line 425)

@(source, data) obj.onDataReceived());

> In asyncio/Channel/onDataReceived (line 487)

In asyncio.Channel>@(source,data)obj.onDataReceived() (line 425)

--------------------------------------------------------------------------------------------------------

function  function1()    
Bytes_DATAF1=t1.NumBytesAvailable
    DATA=read(t1,210);
    decode=swapbytes(typecast(uint8(DATAF1(1,7:10)'),'uint32'));
    Bytes_DATAF2=t1.NumBytesAvailable
end