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Topic: serial communication with hex strings
Replies: 6   Last Post: Dec 28, 2012 11:31 AM

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Ken

Posts: 3
Registered: 1/29/09
Re: serial communication with hex strings
Posted: Jan 30, 2009 9:32 AM
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"David" <dave@bigcompany.com> wrote in message <glsogh$c19$1@fred.mathworks.com>...
> "Ken " <robinson@kuchera.com> wrote in message <glsl90$gni$1@fred.mathworks.com>...
> > Im trying to output a HEX string to a camera to makes it turn a filter on. The command is '8101040102FF'. I've made a small m.file to do it. When i run the m.file the filter doesnt turn on.
> > Im not sure if the HEX string is being output ftom the m.file to the com port because nothing happens.
> >
> > code
> >
> > s=serial('COM1');
> > set(s,'BaudRate', 9600);
> > set(s,'DataBits', 8);
> > set(s,'StopBits', 1);
> > fopen(s);
> > Str=('8101040102FF');
> > sprintf('%s %X','8101040102FF')
> > fclose(s);

>
> your sprintf statement is malformed. you have 2 substitutions, %s and %X but only one value which is a string.
>
> and are you sure the camera wants the digits as a string, or does it want them as binary bytes?




the camera wants them as bytes



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