lab5

iverilog/tobb/lab5/knightRider.v

@@ -0,0 +1,31 @@
+module knightRider (
+    input clk,
+    output reg [7:0] leds
+);
+
+reg direction;
+
+initial begin
+    leds = 8'b0000_0111;
+    direction = 1'b0; // 0 left to right
+end
+
+always@(posedge clk) begin
+if (direction == 0) begin
+    if (leds == 8'b1110_0000) begin
+        direction <= 1;
+        leds <= leds >> 1;
+    end else begin
+        leds <= leds << 1;
+    end
+end else begin
+        if (leds == 8'b0000_0111) begin
+            direction <= 0;
+            leds <= leds << 1;
+        end else begin
+            leds <= leds >> 1;
+        end
+    end
+end
+
+endmodule