function varargout = key1(varargin)
% KEY1 M-file for key1.fig
% KEY1, by itself, creates a new KEY1 or raises the existing
% singleton*.
%
% H = KEY1 returns the handle to a new KEY1 or the handle to
% the existing singleton*.
%
% KEY1('CALLBACK',hObject,eventData,handles,...) calls the local
% function named CALLBACK in KEY1.M with the given input arguments.
%
% KEY1('Property','Value',...) creates a new KEY1 or raises the
% existing singleton*. Starting from the left, property value pairs are
% applied to the GUI before key1_OpeningFunction gets called. An
% unrecognized property name or invalid value makes property application
% stop. All inputs are passed to key1_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
% Copyright 2002-2003 The MathWorks, Inc.
% Edit the above text to modify the response to help key1
% Last Modified by GUIDE v2.5 13-Dec-2009 23:16:54
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', @key1_OpeningFcn, ...
'gui_OutputFcn', @key1_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 key1 is made visible.
function key1_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 handle
2021-10-25 14:30:51
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大二时候弄的东西。借助dtmf功能完成手机按键输入指令和单片机之间的交流。测试dtmf相关的东西。有同学想问这部分的低端问题的话可以联系我。高端就算了
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双音多频信号的软件合成及其解码算法比较，宋永宝，孙伟，双音多频信号在现代通信系统中有着广泛的应用。本文详细的分析了双音多频信号特点，给出了纯软件分析双音多频信号的方法。运用Mat
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