Forum Discussion
BCrowell
New Contributor
2 years agoDigging through the code I have traced the source of the X's in the data to the cyclone10lp_rublock instantiated as sd4 within the altera_remote_update_core.v file. The regout port of this block connected to signal wire_sd4_regout is always hiZ, which I believe is causing the read data to eventually become X. The cyclone10lp_rublock seems to be a black box as far as I can see so I can't trace this back any further.