Serial port interrupt in Gui.
in [Matlab]
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From: Jorge Luis on 1 Jun 2010 18:02 Hi, for what i have seen it is possible to make an interrupt in matlab when the serial port has for example 6 bytes. So far so good, i was trying to do it and i cant figure it out. So i have a gui, i chose which com i want to open, and i open like this port=handles.popupmenu1; s1 = serial(port, 'BAUDRATE',38400); s1.BytesAvailableFcnCount = 40; s1.BytesAvailableFcnMode = 'byte'; s1.BytesAvailableFcn=(a)mycallback; fopen(s1); and my callback is defined as function mycallback(hObject, event, handles) do something here so when i have 40 bytes it should go to mycallback right? it doesnt. It gives an error. Do u have any idea how to program this?
From: Ankit Desai on 2 Jun 2010 08:24 "Jorge Luis" <jorgefil(a)hotmail.com> wrote in message <hu400s$csv$1(a)fred.mathworks.com>... > Hi, > for what i have seen it is possible to make an interrupt in matlab when the serial port has for example 6 bytes. So far so good, i was trying to do it and i cant figure it out. > > So i have a gui, i chose which com i want to open, and i open like this > > port=handles.popupmenu1; > s1 = serial(port, 'BAUDRATE',38400); > > s1.BytesAvailableFcnCount = 40; > s1.BytesAvailableFcnMode = 'byte'; > s1.BytesAvailableFcn=(a)mycallback; > fopen(s1); > > and my callback is defined as > > > function mycallback(hObject, event, handles) > do something here > > so when i have 40 bytes it should go to mycallback right? it doesnt. It gives an error. Do u have any idea how to program this? Hi Jorge, Can you provide more details about the error you receive? What is the error message? Conceptually I do not see why it would not work. I have used the same logic in the demo I wrote: http://www.mathworks.com/matlabcentral/fileexchange/27290-collect-and-plot-data-from-a-tcpip-server-in-real-time Having the error message might be helpful. -Ankit
From: Jorge Luis on 2 Jun 2010 17:16 "Ankit Desai" <adesai.nospam(a)mathworks.com> wrote in message <hu5ih5$e1a$1(a)fred.mathworks.com>... > "Jorge Luis" <jorgefil(a)hotmail.com> wrote in message <hu400s$csv$1(a)fred.mathworks.com>... > > Hi, > > for what i have seen it is possible to make an interrupt in matlab when the serial port has for example 6 bytes. So far so good, i was trying to do it and i cant figure it out. > > > > So i have a gui, i chose which com i want to open, and i open like this > > > > port=handles.popupmenu1; > > s1 = serial(port, 'BAUDRATE',38400); > > > > s1.BytesAvailableFcnCount = 40; > > s1.BytesAvailableFcnMode = 'byte'; > > s1.BytesAvailableFcn=(a)mycallback; > > fopen(s1); > > > > and my callback is defined as > > > > > > function mycallback(hObject, event, handles) > > do something here > > > > so when i have 40 bytes it should go to mycallback right? it doesnt. It gives an error. Do u have any idea how to program this? > > Hi Jorge, > > Can you provide more details about the error you receive? What is the error message? > Conceptually I do not see why it would not work. > > I have used the same logic in the demo I wrote: http://www.mathworks.com/matlabcentral/fileexchange/27290-collect-and-plot-data-from-a-tcpip-server-in-real-time > > Having the error message might be helpful. > > -Ankit Hi, thanks for your answer, so the problem is, when there is an interrupt it goes to mycallback function. But in my callback i want to read the serial port. For that i use handles, the problem is that it cannot find handles, so i cannot read the serial port. The error its or cannot find handles, or says me that h must be a figure. i use this in a pushbutton callback, open the serial port and do this, handles.pushbutton2=s1; guidata(hObject, handles); I use this in the mycallback; handles = guidata(gcbo); s1=handles.pushbutton2; And it doesnt work. If it is in a callback from a pushbutton everything is ok.
From: Walter Roberson on 2 Jun 2010 17:37 Jorge Luis wrote: > Hi, thanks for your answer, so the problem is, when there is an > interrupt it goes to mycallback function. But in my callback i want to > read the serial port. For that i use handles, the problem is that it > cannot find handles, so i cannot read the serial port. The error its or > cannot find handles, or says me that h must be a figure. > > i use this in a pushbutton callback, open the serial port and do this, > > handles.pushbutton2=s1; > guidata(hObject, handles); > > I use this in the mycallback; > > handles = guidata(gcbo); > s1=handles.pushbutton2; > > And it doesnt work. If it is in a callback from a pushbutton everything > is ok. Pass the figure number (or any object in the figure) as a parameter to the callback when you create it. timer('TimerFcn', @(src,event) MyTimerCallback(src, event, gcf)); The gcf will be executed at the time the timer is created and will evaluate to the figure number as it is at that time; that number will become a constant parameter to the callback function MyTimerCallback(src, event, figureno) handles = guidata(figureno); s1 = handles.pushbutton2; ... end
From: Jorge Luis on 2 Jun 2010 17:49
Walter Roberson <roberson(a)hushmail.com> wrote in message <hu6j17$jqq$1(a)canopus.cc.umanitoba.ca>... > Jorge Luis wrote: > > > Hi, thanks for your answer, so the problem is, when there is an > > interrupt it goes to mycallback function. But in my callback i want to > > read the serial port. For that i use handles, the problem is that it > > cannot find handles, so i cannot read the serial port. The error its or > > cannot find handles, or says me that h must be a figure. > > > > i use this in a pushbutton callback, open the serial port and do this, > > > > handles.pushbutton2=s1; > > guidata(hObject, handles); > > > > I use this in the mycallback; > > > > handles = guidata(gcbo); > > s1=handles.pushbutton2; > > > > And it doesnt work. If it is in a callback from a pushbutton everything > > is ok. > > Pass the figure number (or any object in the figure) as a parameter to the > callback when you create it. > > timer('TimerFcn', @(src,event) MyTimerCallback(src, event, gcf)); > > The gcf will be executed at the time the timer is created and will evaluate to > the figure number as it is at that time; that number will become a constant > parameter to the callback > > function MyTimerCallback(src, event, figureno) > handles = guidata(figureno); > s1 = handles.pushbutton2; > ... > end Hello, Walter can you explain me the timer function. so i still define this as s1.BytesAvailableFcnCount = 40; s1.BytesAvailableFcnMode = 'byte'; s1.BytesAvailableFcn=(a)mycallback; fopen(s1); handles.pushbutton2=s1; guidata(hObject, handles); ? |