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module blinky (
input clk_pin,
output led1_pin,
output led2_pin,
output led3_pin,
output led4_pin,
output led5_pin
);
wire clk, led1, led2, led3, led4, led5;
SB_IO #(
.PIN_TYPE(6'b 0110_01),
.PULLUP(1'b0),
.NEG_TRIGGER(1'b0)
) led_iob [4:0] (
.PACKAGE_PIN({led1_pin, led2_pin, led3_pin, led4_pin, led5_pin}),
.LATCH_INPUT_VALUE(),
.CLOCK_ENABLE(),
.INPUT_CLK(),
.OUTPUT_CLK(),
.OUTPUT_ENABLE(),
.D_OUT_0({led1, led2, led3, led4, led5}),
.D_OUT_1(),
.D_IN_0(),
.D_IN_1()
);
SB_IO #(
.PIN_TYPE(6'b 0000_01),
.PULLUP(1'b0),
.NEG_TRIGGER(1'b0)
) clk_iob (
.PACKAGE_PIN(clk_pin),
.LATCH_INPUT_VALUE(),
.CLOCK_ENABLE(),
.INPUT_CLK(),
.OUTPUT_CLK(),
.OUTPUT_ENABLE(),
.D_OUT_0(),
.D_OUT_1(),
.D_IN_0(clk),
.D_IN_1()
);
localparam BITS = 5;
localparam LOG2DELAY = 22;
reg [BITS+LOG2DELAY-1:0] counter = 0;
reg [BITS-1:0] outcnt;
always @(posedge clk) begin
counter <= counter + 1;
outcnt <= counter >> LOG2DELAY;
end
assign {led1, led2, led3, led4, led5} = outcnt ^ (outcnt >> 1);
endmodule
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