Strange PYNQ Behavior: Vector Exponentiation

[rashedkoutayni]

I suggest the following:
1- Make sure that TLAST is synthesized (either from HLS report or from RTL code or from system integrator by expanding INPUT_r and OUTPUT_r ports.)
2- Try AXILite interface and use control flags from your PS.
3- Take a look at the tutorials mentioned in this post (because DMA is very sensitive in PYNQ, either you configure it exactly as mentioned or it won’t work):

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…

4- Make sure that the constant is 1