If data is not being transmitted or received, check the following conditions:
• If transmit < interface_name >_tready is stuck Low following the < interface_name >_tvalid input being asserted, the core cannot send data.
• If the receive < interface_name >_tvalid is stuck Low, the core is not receiving data.
• Check that the ACLK inputs are connected and toggling.
• Check that the AXI4-Stream waveforms are being followed (see This Figure ).
• Check core configuration.