How do I write from a GUI button in a simulink parameter ?

5 次查看（过去 30 天）
Sandy
Sandy 2012-8-23
Hello I'm writing a GUI (without GUIDE) in order to control inputs in a simulink model (for example a command controlled by the user in the GUI, this command being an input in simulink model). Here is the code of the GUI:
function varargout = OHP_Fuel_Panel(varargin)
% MYGUI Brief description of GUI.
% Creation of matlab figure
ohp_h = figure('MenuBar','none','Name','OHP - Fuel Control Panel',...
'NumberTitle','off','Position',[360,500,450,285]);
% Construct the components
L_BP1_h = uicontrol(ohp_h,'Style','togglebutton','String','OFF','Value',0,...
'Position',[30 20 100 30],'callback',@change_label);
% Callbacks for MYGUI
function change_label(L_BP1_h,eventData)
pump_status = get(L_BP1_h,'Value');
if (pump_status==1)
set(L_BP1_h,'String','ON');
else
set(L_BP1_h,'String','OFF');
end
set_param('VSO/Left BP1 command','Value', pump_status);
end
end
The simulink model is made of a block constant 'Left BP1 command' for which the value is set to "pump_status" and this block is simpky sent to an output port. In the matlab command window, I launch the GUI by its file name, then I run the simulink simulation. But I got the following error message about the GUI:
??? Error using ==> OHP_Fuel_Panel>change_label at 40
Invalid setting in Constant block 'Left BP1 command' for parameter 'Value'.
??? Error while evaluating uicontrol Callback
and this message when I run the simulink model:
Error evaluating parameter 'Value' in 'VSO/Left BP1 command': Undefined function or variable 'pump_status'.
Could you help me to resolve this problem ?

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回答（1 个）

Sachin Ganjare
Sachin Ganjare 2012-9-12
Reason coould be uninitialized variable in workspace, instead of 'set_param' command use 'assignin' in your GUI code.
Hope this helps!!!!!!!!!

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