nextpnr/ice40/icebreaker.v
David Shah 4694c6aae7 ice40: Update examples to use packer/pcf
Signed-off-by: David Shah <davey1576@gmail.com>
2018-06-13 12:55:08 +02:00

27 lines
602 B
Verilog

module icebreaker (
input clki,
input btn1,
input btn2,
input btn3,
output led1,
output led2,
output led3,
output led4,
output led5
);
wire clk;
SB_GB clk_gb(.USER_SIGNAL_TO_GLOBAL_BUFFER(clki), .GLOBAL_BUFFER_OUTPUT(clk));
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);
//assign {led1, led2, led3, led4, led5} = {!btn1, btn2, btn3, btn2, btn1};
endmodule