f4pga-examples/xc7/additional_examples/uart_transmitter/timer_par.sv

33 lines
679 B
Systemverilog
Raw Normal View History

`timescale 1ns / 1ps
`default_nettype none
module timer_par #(parameter MOD_VALUE=1, parameter BIT_WIDTH = 1) (
input wire logic clk, reset, increment,
output logic rolling_over,
output logic[BIT_WIDTH-1:0] count
);
always_ff @(posedge clk)
begin
if(reset)
count <= 0;
else if(increment)
begin
if(rolling_over)
count <= 0;
else
count <= count + 1'b1;
end
end
always_comb
begin
if(increment && (count==MOD_VALUE-1))
rolling_over = 1'b1;
else
rolling_over = 1'b0;
end
endmodule