MATLAB: How to send an ASCII code via matlab : fwrite or fprintf

asciirs232

How to send an ASCII code via matlab : fwrite or fprintf ? For example the code 'A30005". Do I need to add something like %s : fprintf(com1,'%s","A30005') Best regards Stanislas

Best Answer

You an use either call. fprintf() like Thorsten shows, or

fwrite(com1, 'A30005')

If you need to send a terminator (CR or LF) then fprintf() is usually easier

fprintf(com1, '%s\n', 'A30005')

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MATLAB: Sending T over Serial port to Scale

fprintf(s, '%cT', 27)

you might also need to send a terminator

MATLAB: Is it possible to set the EOSCharCode property of a GPIB object created using Instrument Control Toolbox to CR/LF (i.e. carriage return and linefeed)

With the GPIB object, it is not possible to have a multi-character terminating character - EOSCharCode property value. The driver for GPIB only allows for one terminating character.

One suggested workaround is to set the EOSCharCode property to just the carriage return. After receiving the carriage return, you can read the next character:

fread(obj, 1);

and determine if it is a linefeed.

If it is, then you know that the command value is terminated. This will happen the majority of the time.

If it is not, then you will have to continue reading and will have to concatenate the data that was just read with the data that was about to be read. This could easily be made into a function.

Best Answer

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MATLAB: Sending T over Serial port to Scale

MATLAB: Is it possible to set the EOSCharCode property of a GPIB object created using Instrument Control Toolbox to CR/LF (i.e. carriage return and linefeed)

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