Timing error happened when seting series IIR filter in Speedgoat target machine

Hi alls

I 'm using HDL Coder with simulink for building a set of IIR filters in series in Speedgoat target machine.

I used the following three methods：

1.Connect Biquad block in turn; (As shown in the following figure）

2.Connect Discrete Transfer Fcn block in turn;

3,Use add, gain and delay blocks to build Direct Form II IIR filter and then connecting them in turn.

I can get a correct filtering result in simulink. However, when using the HDL Workflow Advisor of HDL code and run the generated gm_.slx on speedgoat target mechine, the results were always wrong. I suspect it's a time sequence problem, but I don't know how to solve it or what to set up. Or is there a better way to build an IIR filter model that can be connected in series.

THANKS advanced,

ERIC

Answer 1

[Kiran Kintali]

Please reach out to tech support for guidance on the topic with your model.

You can use the workflow to get a high level view of the critical path in your model.

https://www.mathworks.com/help/hdlcoder/ug/find-estimated-critical-paths-without-synthesis-tools.html