我收到以下有关 fprintf 函数中输入参数过多的错误消息。但在我看来,通过了适量的论点。
所有这些都是在我制作的 GUI 指南的背景下进行的(见最后的图片)。
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);
以及handles.s来自哪里
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
和 setupserial 函数
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
使用以下解决了问题
OutputString = sprintf('C0 %s %s %s %s',StartStepsStr,EndStepsStr,Increment,Wait);
fprintf(handles.s,'%s', OutputString);