If data is not being transmitted or received for the AXI4-Stream Interfaces, check the following conditions:
• If transmit s_axi_tx_tready is stuck Low following the s_axi_tx_tvalid input being asserted, the core cannot send data.
• If the receive s_axi_tx_tvalid is stuck Low, the core is not receiving data.
• Check that the user_clk inputs are connected and toggling.
• Check that the AXI4-Stream waveforms are being followed. See This Figure .
• Check core configuration.