How can I send data to a different serial port when a callback event occurs on another serial port?

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David Dijemeni 2014-3-24

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/122779-how-can-i-send-data-to-a-different-serial-port-when-a-callback-event-occurs-on-another-serial-port

评论： Kevin Hajek 2015-9-2

I am trying to send data via USB serial port when an event occurs on another serial port.

I am getting the following warning:

Warning: The BytesAvailableFcn is being disabled. To enable the callback property either connect to the hardware with FOPEN or set the BytesAvailableFcn property.

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Answer 1

Walter Roberson 2014-3-24

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https://ww2.mathworks.cn/matlabcentral/answers/122779-how-can-i-send-data-to-a-different-serial-port-when-a-callback-event-occurs-on-another-serial-port#answer_129961

在 MATLAB Online 中打开

s1 = serial('COM1', .....);
s2 = serial('COM7', .....);
set(s1, 'BytesAvailableFcn', @(src, evt) fwrite(s2, fread(s1, s1.BytesAvailable)) );
fopen(s2);
fopen(s1);

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David Dijemeni 2014-3-24

I tried

time = datestr(now,0); s1 = serial('COM1', .....); s2 = serial('COM7', .....); set(s1, 'BytesAvailableFcn', @(myfunction, time) fwrite(s2, fread(s1, s1.BytesAvailable)) ); fopen(s2); fopen(s1);

It didnt work. Please am I doing anything wromg?

Kevin Hajek 2015-9-2

I'm seeing the same error message, but I am trying to use the serial object in the callback. If you happened to find a solution, please share it here. I'll keep looking around.

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