Vivado tutorial

Base code for the HLS tutorial for Bristol.

The code adds two vectors and multiplies them. Vector size is set by changing the ARRAY_SIZE variable in HLS_Vectors.h.

Setting up Vivado HLS

Run

vivado_hls -f VectorSum_setup.tcl

to open a Vivado HLS TCL shell of the set up project.

Doing things with the code

Within the TCL shell run:

• csim (shortener of csim_design) to run the C simulation test bench
• csyn (shortener of csynth_design) to synthesise the code
• cosim (shortener of csynth_design), after having run csyn successfully, to run the co-simulation test bench

Available tags

Three tags are available:

• base, which is the base code to add and multiply two vector without any optimisation
• cpp_version, which has optimisation to maximise code throughput
• optimised, which is a rewriting of the code using a template class for vectors with overloaded operator. It shows that C++ constructs, while simplifying writing code, do not increase latency and resource usage of your design.

Accessing the synthesis report

Synthesis report are located in VivadoTutorial/KU115/syn/report/ with .rpt extension in human-readable format and with .xml in XML format, useful for automated analysis.