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Honored Contributor
Honored ContributorHow to read output port?
I need to read state of some output ports in my application. In some part of the program I write these ports and in other part I want to read actual state and I wouldn't like to use special v...
Altera_ForumHonored Contributor
Honored Contributorthere are two cases for ports:
1. port signals are connected to real in/outputs of fpga ( i think it's ok to use tristate signals to read back the setting of the outputs) 2. port signals are used internal in fpga (tristate does not make sense, I don't know if quartus syntesizes tristate registers away ?) because I had some signals with case 2 and also wanted to read back the settings of the outputs, i made ports with input and output (no tristate) and connected in/outputs of these ports together in the top schematic. perhaps someone from altera can explain what will happen if i use tristate for internal port signals ?
