Tlast signal?

[marioruiz]

Hi @shiqi17,

I would suggest you familiarize yourself with the AXI4 standard and in particular the stream version.

There are a few post in the forum that deals with this, for instance:

TLAST Issue

Hi everyone. I am using Vivado 2019.2, vivado_hls, PYNQ 2.7, and the ZCU111 board. is it fine to use vivado 2019.2 for PYNQ 2.7 or should i upgrade to the new version of Vivado to not face any internal version issues . I have assigned TLAST in my HLS design. It has a 1 bit data width, but when it comes to ILA debugging, it shows zero. HLS summary [Screenshot from 2022-06-07 19-15-05] Vivado IP: [Screenshot from 2022-06-07 19-34-38] ILA Waveform I checked my IP with ILA. To complete the D…

TLAST signal not synthesized!

Hello all, I’m using an axis interface for data in and out (eventually using DMA) but with floating point type. So i need to set the TLAST signal manually, as a million tutorials suggested. But in my case, it doesn’t get synthesized for some reason. Here is my code: void fit(hls::stream<axis_t> &in, hls::stream<axis_t> &out, float lambda, float gamma) { #pragma HLS INTERFACE axis port=in #pragma HLS INTERFACE axis port=out #pragma HLS INTERFACE s_axilite port=lambda #pragma HLS INTERFACE s_a…

Code example here: https://github.com/Xilinx/Vitis-HLS-Introductory-Examples/tree/master/Interface/Streaming

Mario