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RS485 communication in matlab

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Toke Søltoft
Toke Søltoft 2014-9-2
回答： Toke Søltoft 2014-9-2
Does matlab support RS485 support via com port? If so, I can't find any guide to how it works.
I have tried this code, but it does not work. If I send the numbers through realterm n RS485, it works fine.
s = serial('COM3','BaudRate',38400);
set(s,'StopBits',1);
set(s,'DataBits',8);
fopen(s);
fprintf(s,'2 7 2 2 255 255 255 248');
fwrite(s,'2 7 2 2 255 255 255 248');
fclose(s)

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Toke Søltoft
Toke Søltoft 2014-9-2
I figured it out. I just needed to change the output to ascii characters, e.g.
fwrite(s,char(2,7,1,2,0,0,0,4));

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