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iceFun_Projects/uart/bench/uart_tx_tb.v

64 lines
1.7 KiB
Verilog

`timescale 1ns/1ps
`define IVERILOG 1
module uart_tx_tb;
/*autowire*/
// Beginning of automatic wires (for undeclared instantiated-module outputs)
wire tx_done_o; // From uut of uart_tx.v
wire tx_o; // From uut of uart_tx.v
// End of automatics
/*autoreginput*/
// Beginning of automatic reg inputs (for undeclared instantiated-module inputs)
reg clk; // To uut of uart_tx.v
reg [7:0] data_i; // To uut of uart_tx.v
reg en_i; // To uut of uart_tx.v
reg rst_n; // To uut of uart_tx.v
// End of automatics
localparam CLK_PERIOD = 10;
uart_tx #(/*autoinstparam*/
// Parameters
.CLOCKS_PER_BAUD (CLK_PERIOD - 1)) uut (/*autoinst*/
// Outputs
.tx_o (tx_o),
.tx_done_o (tx_done_o),
// Inputs
.clk (clk),
.rst_n (rst_n),
.en_i (en_i),
.data_i (data_i[7:0]));
initial begin
$dumpfile("build/waveform.vcd");
$dumpvars(0, uut);
clk = 1'b1;
rst_n = 1'b1;
data_i = 0;
end
always
#(CLK_PERIOD/2) clk = ~clk;
initial begin
#(CLK_PERIOD);
rst_n = 0;
#(CLK_PERIOD);
rst_n = 1;
#(CLK_PERIOD);
data_i = 8'h55;
en_i = 1;
#(CLK_PERIOD);
en_i = 0;
#(200 * CLK_PERIOD);
#400 $finish; // finish at 200 ticks
end
endmodule // end of uart_tx_tb
// Local Variables:
// verilog-library-directories:(".." "../rtl" ".")
// End: