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AIbra11's avatar
AIbra11
Icon for New Contributor rankNew Contributor
5 years ago

Reading inputs in a state-machine

Hello, I've spent a lot of time trying to get this state machine working with no hope. Requirement: In this FSM, we want to set: - opcode_reg and offset_reg to USB3_DATA(3 downto 0) and USB_DA...
sstrell's avatar
sstrell
Icon for Super Contributor rankSuper Contributor
5 years ago

Follow the LHS (left hand side)!

Are you sure USB3_DATA isn't changing at all? You have it in a separate assignment (non-clocked logic), so it will update immediately if there is a change:

USB3_DATA <= USBSendDataOut when USBWrOeRSig = '1' else (others => 'Z');