我正在尝试制作一个类似于缓冲区的 2 级 s-function(我刚开始学习 S-functions)。现在我想要的是,每次输入进入时,它都会存储在下一个索引中,直到缓冲区变满,然后它开始将存储的数据从第 2 个到最后一个索引推送到第一个到第二个索引,并在采样时间后自我更新我将附上我的代码,以便更好地理解
function Buffer(block)
global i;
i = 1;
setup(block);
function setup(block)
% Register number of ports
block.NumInputPorts = 2;
block.NumOutputPorts = 1;
% Setup port properties to be inherited or dynamic
block.SetPreCompInpPortInfoToDynamic;
block.SetPreCompOutPortInfoToDynamic;
% Override input port properties
block.InputPort(2).Dimensions = 1;
block.InputPort(2).DatatypeID = 0; % double
block.InputPort(2).Complexity = 'Real';
block.InputPort(2).DirectFeedthrough = true;
% Override input port properties
block.InputPort(1).Dimensions = 1;
block.InputPort(1).DatatypeID = 0; % double
block.InputPort(1).Complexity = 'Real';
block.InputPort(1).DirectFeedthrough = true;
% Override output port properties
block.OutputPort(1).Dimensions = [1 block.InputPort(2).Data];
block.OutputPort(1).DatatypeID = 0; % double
block.OutputPort(1).Complexity = 'Real';
block.SampleTimes = [-1 0];
block.SimStateCompliance = 'DefaultSimState';
block.RegBlockMethod('Outputs', @Outputs);
block.RegBlockMethod('Update', @Update);
block.RegBlockMethod('Terminate', @Terminate);
function Outputs(block)
block.OutputPort(1).Data(i) = block.InputPort(1).Data;
% block.Dwork(1).Data
%end Outputs
%%
%% Update:
%% Functionality : Called to update discrete states
%% during simulation step
%% Required : No
%% C-MEX counterpart: mdlUpdate
%%
function Update(block)
if(i == block.InputPort(2).Data)
block.OutputPort(1).Data(1:block.InputPort(2).Data - 1) = block.OutputPort(1).Data(2:block.InputPort(2).Data);
else
i = i + 1;
end
%end Update
function Terminate(block)
现在的问题是,虽然我已经声明i
为全局变量,但当我运行它说 i 未定义的函数时,有人知道我在做什么错吗?