who i can write more then one value on port?

im going to write more than one value on port but it s not working .it s just write tha values as one value.

global a;
a=serial('COM4');
setpoint=str2double(get(handles.s,'string'));
k=str2double(get(handles.k1,'string'));
i=str2double(get(handles.k2,'string'));
d=str2double(get(handles.k3,'string'));
fprintf(a,'%d',setpoint);
fprintf(a,'%d',k);
fprintf(a,'%d',i);
fprintf(a,'%d',d);

[Geoff Hayes]

husman - please clarify what you mean by it's not working and it just writes the values as one value. Are you observing an error message? If so, what is it? Else describe where your above code is going wrong. Is it because you convert the strings to doubles? What are the data types for your variables? Do you need to cast these variables to signed integers?

[husam alrajab]

as you can see it s work but the values is the same for each value it s not write as Parallel

Before run it

after run it

Answer 1

[Walter Roberson]

When you provide your own format to fwrite to serial, then no delimiter is added automatically. CR or LF will not be added between your values when your provide your own format. You need to code in an appropriate delimiter, possibly '%d\n' or '%d ' for the first several and '%d\n' for the last.

[husam alrajab]

I tried it but it did not work at all it s give me a error message

Warning: Unsuccessful read: A timeout occurred before the Terminator was reached.

'serial' unable to read any data. For more information on possible reasons, see Serial Read Warnings.

Unable to perform assignment because the indices on the left side are not compatible with the size of the right side.

Error in untitled>ba_Callback (line 128)

y1(x)=fscanf(a,'%d');

[Walter Roberson]

Where is your fopen(a) ?

[husam alrajab]

It's in another section . i make it in first press the Contact button in that button there is definition of serial and open the serial .

Before run it

after run it