`timescale 1ns/1ps module uart_irq_tb(); sim_top u_sim_top(); initial begin u_sim_top.u_sim_uart.tx_en = 1; @(posedge u_sim_top.r_clk_cpu); u_sim_top.u_sim_uart.tx_data = 8'hAA; repeat (100) @(posedge u_sim_top.r_clk_cpu); $finish(); end endmodule