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.
•Check core configuration.