how can i create a delay block(like in simulink) with matlab code

8 次查看(过去 30 天)
I do a FFT project, the data go in and delay for some clock to wait the next data and caculate butterfly. Example if i delay 8 clock then simulink generate 8 register(dff) and shift them every clock, and i want do that in matlab code to generate HDL code. Some one can help me? Thank you!

回答(2 个)

Kiran Kintali
Kiran Kintali 2017-8-15
编辑:Walter Roberson 2021-5-31
delay in MATLAB can be modeled using persistent variable.
function y = fcn(u) % Unit delay implementation that maps to a register in hardware
persistent u_d;
if isempty(u_d)
% defines initial value driven by unit delay at time step 0
u_d = cast(0, 'like', u);
end
% return delayed input from last sample time hit
y = u_d;
% store the current input
u_d = u;
  1 个评论
Conner Garcia
Conner Garcia 2021-5-31
this hasnt worked, the outputs are different. the link you sent i think there is an error when converting from Uint to a Fi object.

请先登录,再进行评论。


Gareth Thomas
Gareth Thomas 2017-8-14
Have you tried the pause command?
  1 个评论
Tien Pham
Tien Pham 2017-8-14
No, it is register when i generate HDL code. I do a FFT project, the data go in and delay for some clock to wait the next data and caculate butterfly. If i delay 8 clock then simulink generate 8 register and shift them every clock, and i want do that in matlab code to generate HDL code. Sorry my English is weak, thank you!

请先登录,再进行评论。

类别

Help CenterFile Exchange 中查找有关 Sources 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