0 个投票

Hi, I am using serial port communication. I can write and read the data but the warning after "fscanf" keep pop up. Below attached the code. Code:
s=serial('COM6','BaudRate',115200,'Parity','none'...
,'DataBits',8,'FlowControl','none'...
,'Terminator','LF/CR');
fopen(s);
fprintf(s,'t');
out = fscanf(s)
Warning: A timeout occurred before the Terminator was reached.
May i know what is the problem?

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Abhirama B A
Abhirama B A 2019-7-16
I am also having the same problem even after using the code
set(s, 'TimeOut', 100)
can you help to get rid of this?
Walter Roberson
Walter Roberson 2019-7-16
Check the baud rate you are configuring.
Check that the terminator matches.
Use a program such as TeraTerm to verify that you are able to receive data from the port.

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 采纳的回答

Jan
Jan 2012-6-22

1 个投票

If the timeout occurred to early, what about increasing the time?
set(s, 'TimeOut', 100)
? But the default of 10 seconds should be long enough... Perhaps the other parameters are not correct?

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Walter Roberson
Walter Roberson 2012-6-22
In particular double-check the terminator.
Shawn Chang
Shawn Chang 2012-6-25
Hi, thanks for replied. After i set the time out to 100,and check the terminator, the warning still exist. Does the warning will affect thereceiving data?
Walter Roberson
Walter Roberson 2012-6-25
The warning might be indicating that you are not getting any data at all.
If you are getting data then the timeout will be slowing down your program a lot.
Shawn Chang
Shawn Chang 2012-6-28
Thanks Jan and Walter replied, now I know how the stuff is worked.
wenshuo dong
wenshuo dong 2018-8-1
Can you tell me what is the problem? how can I figure it out? I meet the same issue as yours. Thanks!

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