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/* Pressing the button stops the blinking because no clock source will be selected */
module top (
input clk,
input key_i,
input rst_i,
output [`LEDS_NR-1:0] led
);
reg [31:0] counter;
reg [31:0] counter2;
wire clk1, clk2;
wire key = key_i ^ `INV_BTN;
DCS dcs(
.CLK0(1'b1),
.CLK1(clk),
.CLK2(1'b1),
.CLK3(1'b1),
.CLKSEL({1'b0, 1'b0, key, 1'b0}),
.SELFORCE(1'b1),
.CLKOUT(clk1)
);
defparam dcs.DCS_MODE="CLK1_GND";
always @(posedge clk1) begin
if (counter < 31'd1350_0000)
counter <= counter + 1;
else begin
counter <= 31'd0;
led[1:0] <= {~led[0],led[1]};
end
end
endmodule
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