1 files changed, 57 insertions, 0 deletions
diff --git a/ice40/blinky.v b/ice40/blinky.v
new file mode 100644
index 00000000..6b97c5a9
--- /dev/null
+++ b/ice40/blinky.v
@@ -0,0 +1,57 @@
+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