Intro
This post will take a closer look of the FIR example project we discussed in Cadence HLS Stratus IDE Basic: How to Use the Example FIR Project
Topics include cynw_p2p channel for input and output data, specify design latency (HLS_CONSTRAIN_LATENCY), HLS_DPOPT_REGION, HLS_PIPELINE_LOOP, etc.
FIR project source codes are:
The guts of fir filter is defined in fir.h and fir.cc. Below is fir.h.
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#ifndef _FIR_H_ #define _FIR_H_ #include <cynw_p2p.h> #include "defines.h" SC_MODULE(fir) { public: // Declare the clock and reset ports sc_in_clk clk; sc_in < bool > rst; sc_in < CoeffTable > coeffs; // Declare the input port and the output port. // The template specializations <input_t or output_t> configure the // modular interfaces to carry the desired datatypes. cynw_p2p < input_t, ioConfig >::in din; // The input port cynw_p2p < output_t, ioConfig >::out dout; // The output port SC_CTOR(fir):clk("clk"), rst("rst"), coeffs("coeffs"), din("din"), dout("dout") { SC_CTHREAD(FirThread, clk.pos()); reset_signal_is(rst, 0); // Connect the clk and rst signals to the modular interface ports din.clk_rst(clk, rst); dout.clk_rst(clk, rst); } protected: void FirThread(); // the thread function }; #endif // _FIR_H_ |
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Highlights: 10308 words, 14 images
Continue: Synthesized SystemC and RTL code
- Contents
- 1. Intro
- 2. Synthesized SystemC and RTL code
- 3. HLS_CONSTRAIN_LATENCY
- 4. HLS_PIPELINE_LOOP
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