Too many output arguments ERROR
1 view (last 30 days)
Show older comments
I am making a function to run venting on a pump system. I am getting an error using the matlab timer object. I have the script below and the error let me know if you can help. Thanks!
function vent_man(sec)
v = visa('agilent', 'ASRL1::INSTR');
fopen(v);
hexdata_open = ['02'; '80'; '31'; '32'; '32'; '31'; '31'; '03'; '42'; '33'];
decdata_open = hex2dec(hexdata_open);
hexdata_close = ['02'; '80'; '31'; '32'; '32'; '31'; '30'; '03'; '42'; '33'];
decdata_close = hex2dec(hexdata_close);
t = timer;
t.StartFnc = fwrite(v, decdata_open, 'uint8');
t.StopFnc = fwrite(v, decdata_close, 'uint8');
t.Period = sec;
start(t);
fclose(v);
delete(v);
end
P.S. I have already tried changing the first line to function v = vent_man(sec) which did not work
Error using icinterface/fwrite
Too many output arguments.
Error in vent_man (line 9)
t.StartFnc = fwrite(v, decdata_open, 'uint8');
0 Comments
Answers (1)
Cam Salzberger
on 24 Jul 2020
Edited: Cam Salzberger
on 24 Jul 2020
Keir,
The fwrite method for that object doesn't seem to return an output argument. Always try to make sure that you are both using the correct function and using the function correctly.
In this case, it looks like you want to make a function handle for the timer functions, not call the function immediately. So you probably want something more like:
t.StartFnc = @(~,~)fwrite(v, decdata_open, 'uint8');
and similar for the other
-Cam
3 Comments
Cam Salzberger
on 24 Jul 2020
Always read the error messages - they're usually pretty useful.
See Also
Categories
Find more on Simulink Functions in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!