MATLAB GUI设计之读取串口数据并计算绘图程序 -

function varargout = comtest2(varargin)
% COMTEST2 MATLAB code for comtest2.fig
% COMTEST2, by itself, creates a new COMTEST2 or raises the existing
% singleton*.
%
% H = COMTEST2 returns the handle to a new COMTEST2 or the handle to
% the existing singleton*.
%
% COMTEST2('CALLBACK',hObject,eventData,handles,...) calls the local
% function named CALLBACK in COMTEST2.M with the given input arguments.
%
% COMTEST2('Property','Value',...) creates a new COMTEST2 or raises the
% existing singleton*. Starting from the left, property value pairs are
% applied to the GUI before comtest2_OpeningFcn gets called. An
% unrecognized property name or invalid value makes property application
% stop. All inputs are passed to comtest2_OpeningFcn via varargin.
%
% *See GUI Options on GUIDE's Tools menu. Choose "GUI allows only one
% instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES
% Edit the above text to modify the response to help comtest2
% Last Modified by GUIDE v2.5 15-Dec-2010 16:18:59
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', @comtest2_OpeningFcn, ...
'gui_OutputFcn', @comtest2_OutputFcn, ...
'gui_LayoutFcn', [] , ...
'gui_Callback', []);
if nargin && ischar(varargin{1})
gui_State.gui_Callback = str2func(varargin{1});
end
if nargout
[varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT
% --- Executes just before comtest2 is made visible.
function comtest2_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject handle to figure
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% varargin command line arguments to comtest2 (see VARARGIN)
% Choose default command line output for comtest2
handles.output = hObject;
com = get(handles.popupmenu5,'value');
com = strcat('COM',num2str(com));
handles.serial = serial(com);
% Update handles structure
guidata(hObject, handles);
% UIWAIT makes comtest2 wait for user response (see UIRESUME)
% uiwait(handles.figure1);
% --- Outputs from this function are returned to the command line.
function varargout = comtest2_OutputFcn(hObject, eventdata, handles)
% varargout cell array for returning output args (see VARARGOUT);
% hObject handle to figure
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Get default command line output from handles structure
varargout{1} = handles.output;
.......省略了下拉菜单的函数回调函数.......
% --- Executes on button press in togglebutton1.
function togglebutton1_Callback(hObject, eventdata, handles) %这是打开串口的开关，打开后开始读取数据，并使能callback函数
% hObject handle to togglebutton1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of togglebutton1
sta = get(hObject,'value');
switch sta
case 0
try
fclose(handles.serial);
delete(handles.serial);
guidata(hObject,handles);
catch
msgbox('出错，串口不存在，或其他软件使用该串口','警告','warn');
set(handles.togglebutton1,'value',1);
end
case 1
try
com = get(handles.popupmenu5,'value');
com = strcat('COM',num2str(com));
br = 1200*get(handles.popupmenu1,'value');
sbs = get(handles.popupmenu2,'value');
parit = get(handles.popupmenu3,'value');
switch parit
case 1
strpar = 'odd';
case 2
strpar = 'even';
case 3
strpar = 'none';
end
datbit = 5+get(handles.popupmenu4,'value');
handles.serial = serial(com,'baudrate',br,'parity',strpar,'databits',datbit,'stopbits',sbs);
set(handles.serial,'InputBufferSize',16);
set(handles.serial,'BytesAvailableFcnMode','byte');
set(handles.serial,'BytesAvailableFcncount',16);
guidata(hObject,handles);
set(handles.serial,'BytesAvailableFcn',{@mycom,handles});
fopen(handles.serial);
catch
msgbox('出错，串口不存在，或其他软件使用该串口','警告','warn');
set(handles.togglebutton1,'value',0);
end
end
function mycom(hObject,eventdata,handles) %这是串口读取16个数据后执行的callback函数
newd = fread(handles.serial);
axes(handles.axes1);
plot(newd);
% --- Executes on selection change in popupmenu5.
function popupmenu5_Callback(hObject, eventdata, handles)
% hObject handle to popupmenu5 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hints: contents = cellstr(get(hObject,'String')) returns popupmenu5 contents as cell array
% contents{get(hObject,'Value')} returns selected item from popupmenu5
% --- Executes during object creation, after setting all properties.
function popupmenu5_CreateFcn(hObject, eventdata, handles)
% hObject handle to popupmenu5 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
% Hint: popupmenu controls usually have a white background on Windows.
% See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end

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