Function to stop the running serial communication of comport

4 次查看（过去 30 天）
Gova ReDDy
Gova ReDDy 2014-3-15
评论： Walter Roberson 2014-3-16
Hello,
The serial communication using comport is working fine and the main lines of code are
s1 = open_com_port(com_port);
gui_update_freq_divisor = 20;
flushBytesThreshold = 500;
k = 1;
pulse_count=0;period(20)=0;results(100)=0;max1=0;
while ~s_quitgui
nb = s1.BytesAvailable;
if nb > flushBytesThreshold
error('serial data overflow')
end
if(nb)
currtime(k) = sampleCounter*dt;
[tline,count] = fgetl(s1);
data_tmp = str2num(char(tline));
data(k)=(data_tmp);
if s_writetofile
fprintf(FID,'%f %f \n',currtime,data);
end
% update gui not so often
if (~mod(sampleCounter,gui_update_freq_divisor))
for i=1:1:20
if (data(i)==4095)
results(i)=1;
else
results(i)=0;
end
end
max1=max(results);
axes(rawax_gyr)
set(raw1_gyr,'XData',[get(raw1_gyr,'Xdata') currtime]);
set(raw1_gyr,'YData',[get(raw1_gyr,'YData') data]);
% Slide x-axis of the smaller axes
set(rawax_gyr,'XLim',[currtime(1)-10 currtime(1)])
set(rawax_gyr,'YLim',[-10 5000])
k = 0;i=1;
%drawnow
end
sampleCounter = sampleCounter + 1;
k = k + 1;
end
%pause(0.0001);
end
delete(s1)
close(fh)
end
But what are the lines(command) needed to stop the serial communication of COMPORT.
I am planning to implement this a GUI and for start button the serial communication starts but can I know what are the needed lines in the pushbutton call back fucntion so that it stops the communication when stop button is pressed .
  4 个评论
显示 2更早的评论
Gova ReDDy
Gova ReDDy 2014-3-16
编辑：Gova ReDDy 2014-3-16
I tired to stop the communication using delete(open_com_port(12)) in the stopbutton function but it is stopping the data streaming
function varargout = start1(varargin)
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', @start1_OpeningFcn, ...
'gui_OutputFcn', @start1_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
function start1_OpeningFcn(hObject, eventdata, handles, varargin)
handles.output = hObject;
guidata(hObject, handles);
function varargout = start1_OutputFcn(hObject, eventdata, handles)
varargout{1} = handles.output;
start=uicontrol('Style','pushbutton','String', 'start', 'Position',[20 400 50 20],'Callback',@startbutton_Callback);
stop=uicontrol('Style','pushbutton','String', 'stop', 'Position',[100 400 50 20],'Callback',@stopbutton_Callback);
Exit=uicontrol('Style','pushbutton','String', 'Exit', 'Position',[20 20 50 20],'Callback',@Exitbutton1_Callback);
function Exitbutton1_Callback(hObject, eventdata)
handles = guidata(hObject);
s_quitgui = true;
display('Goodbye');
close(gcf);
function startbutton_Callback(hObject, eventdata)
handles = guidata(hObject);
axes(handles.axes2);
linewidth = 1;
raw1_gyr = line('Parent',handles.axes2,...
'XData',[],...
'YData',[],...
'Color',[0 0 1],...
'LineWidth',linewidth);
com_port = 12;
sampleCounter = 1;
dt = 5*(1e-2);
data_file_name = 'idm30_data.txt';
FID = [];
s_writetofile = false;
s_quitgui = false;
s1 = open_com_port(12);
gui_update_freq_divisor = 20;
flushBytesThreshold = 1000;
k = 1;
while ~s_quitgui
nb = s1.BytesAvailable;
if nb > flushBytesThreshold
error('serial data overflow')
end
if(nb)
currtime(k) = sampleCounter*dt;
[tline,count] = fgetl(s1);
data_tmp = str2num(char(tline));
data(k)=(data_tmp);
if s_writetofile
fprintf(FID,'%f %f \n',currtime,data);
end
if (~mod(sampleCounter,gui_update_freq_divisor))
axes(handles.axes2);
set(raw1_gyr,'XData',[get(raw1_gyr,'Xdata') currtime]);
set(raw1_gyr,'YData',[get(raw1_gyr,'YData') data]);
set(handles.axes2,'XLim',[currtime(1)-1 currtime(1)])
set(handles.axes2,'YLim',[-1 5000])
k = 0;
end
sampleCounter = sampleCounter + 1;
k = k + 1;
end
end
function stopbutton_Callback(hObject, eventdata)
handles = guidata(hObject);
delete(open_com_port(12))
function textbox1_Callback(hObject, eventdata, handles)
function textbox1_CreateFcn(hObject, eventdata, handles)
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end
Can someone explain the way to stop the serial data streaming of comport.

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Walter Roberson
Walter Roberson 2014-3-16
  2 个评论
Gova ReDDy
Gova ReDDy 2014-3-16
Thanks for the information,this will help me in improving the GUI but I really didn't get how to stop the serial communication.
I improved the GUI a bit more but got the problem mentioned here . Can you please help me out in solving this issue.
Walter Roberson
Walter Roberson 2014-3-16
You are trying to set a quit flag in one routine and you are trying to read the quit flag in another routine. The FAQ talks about how to share information between routines.
See also http://www.mathworks.co.uk/matlabcentral/answers/100558-how-do-i-set-up-a-uicontrol-callback-to-interrupt-a-routine

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Matrix Indexing 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by