输入参数过多 [英] Too many input arguments

问题描述

我收到以下关于fprintf函数中输入参数过多的错误消息.但是在我看来，只是传递了正确数量的参数.

I get the following error message about too many input arguments in my fprintf function. But it seems to me that just the right amount of arguments were passed.

所有这些都是在我制作的指南GUI的上下文中完成的(请参见最后的图片).

All this is in the context of a guide GUI I made (see picture at the end).

Error while evaluating uicontrol Callback

calibration button hit
    20

   200

10
10
        2520

       25197

2520
25197
    'C0 2520 25197 10 10'

Error using serial/fprintf (line 115)
Too many input arguments.

Error in UserInterface>StaticCalibrationBtn_Callback (line 202)
fprintf(handles.s, 'C0 %s %s %s %s',StartStepsStr,EndStepsStr,Increment,Wait); 

这是代码

function StaticCalibrationBtn_Callback(hObject, eventdata, handles)
    % hObject    handle to StaticCalibrationBtn (see GCBO)
    % eventdata  reserved - to be defined in a future version of MATLAB
    % handles    structure with handles and user data (see GUIDATA)
    disp('calibration button hit');
    Start = str2double(get(handles.CalFromUserTxt, 'string')); % Fetches the user inputed start location in mm and converts to double
    disp(Start);
    End = str2double(get(handles.CalToUserTxt, 'string')); % same for End position
    disp(End);
    Increment = get(handles.CalUserIncrementTxt, 'string'); % fetches the increment user inputed data as a string
    disp(Increment);
    Wait = get(handles.CalUserSpeedTxt, 'string'); % fetches the wait inputed data as a string
    disp(Wait);
    StartSteps = round(Start/0.00793750000); % computes the starting step position,double division
    disp(StartSteps);
    handles.StartSteps = StartSteps; % creats a place for the start steps inside the handles structure, to be fetched by anythingelsest be saved with guidata(hObject,handles)
    EndSteps = round(End/0.00793750000); % computes the end step position
    disp(EndSteps);
    handles.EndSteps = EndSteps; % stores the end steps to be accessed by anything else must be saved with guidata(hObject,handles)
    StartStepsStr = num2str(StartSteps); % converts the StartSteps double into a string so it can be sent over serial as a string
    disp(StartStepsStr);
    EndStepsStr = num2str(EndSteps); % converts the EndSteps double into a string so it can be sent over serial as a string
    disp(EndStepsStr);
    OutputString = strcat('C0' , {' '} , StartStepsStr , {' '} , EndStepsStr , {' '} , Increment , {' '} , Wait);
    disp(OutputString);
    fprintf(handles.s, 'C0 %s %s %s %s',StartStepsStr,EndStepsStr,Increment,Wait);

handles.s的来源

and where handles.s comes from

function SerialBtn_Callback(hObject, eventdata, handles)
% hObject    handle to SerialBtn (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA
comPort = get(handles.COMportTxt,'String');
if(~exist('serialFlag','var'))
    [handles.s, handles.serialFlag] = setupSerial(comPort);
end
guidata(hObject,handles);
end

还有设置串行功能

function [ s, flag] = setupSerial(comPort)
%Initialize serial port communication between Arduino and Matlab
%Ensure that the arduino is also communicating with Matlab at this time. 
%if setup is complete then the value of setup is returned as 1 else 0.

flag =1;
s = serial(comPort);
set(s,'DataBits',8);
set(s,'StopBits',1);
set(s,'BaudRate',9600);
set(s,'Parity','none');
fopen(s);
a='b';
while (a~='a')
    a=fread(s,1,'uchar');
end
if (a=='a')
    disp('serial read');
end
fprintf(s,'%c','a');
mbox = msgbox('Serial Communication setup.'); uiwait(mbox);
fscanf(s,'%u');
end

使用以下已解决的问题

OutputString = sprintf('C0 %s %s %s %s',StartStepsStr,EndStepsStr,Increment,Wait);
fprintf(handles.s,'%s', OutputString);

推荐答案

有多个函数，称为fprintf，一个用于文件，一个用于串行对象，其他一些.您正在使用从fprintf了解文件的功能，但是将其与串行对象一起使用.检查正确的文档，可以通过doc serial/fprintf

There are multiple functions called fprintf, one for files, one for serial objects and some others. You are using functionally which you know from the fprintf for files, but you are using it with a serial object. Check the right documentation which can be accessed via doc serial/fprintf

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