Vivado HLS has been great provided you use it sparingly and are aware of its limitations. However I want to port my design to Lattice devices and the HLS is proving to be an issue. Does anyone know if there are HLS packages available supporting the ecp5 that are free or cost in the low thousands of dollars?
A quick web search turned up
this. I had not heard of them before looking, so I cannot vouch for anything they say. They do claim “vendor-agnostic HLS” and say that they support Intel, Lattice, Xilinx, Microsemi and Achronix devices (which is to say, all of them).