Add pwm module to set LED colour from LiteX Console

rtl/flipPwm.sv

@@ -0,0 +1,20 @@
+`default_nettype none
+
+module flipPwm
+( input  var        clk
+, input  var [23:0] rgb
+, output var        ledr
+, output var        ledg
+, output var        ledb
+);
+
+logic [7:0] counter;
+
+always_ff @(posedge clk)
+  counter <= counter + 1;
+
+assign ledr = (rgb[23:16] > counter);
+assign ledg = (rgb[15: 8] > counter);
+assign ledb = (rgb[ 7: 0] > counter);
+
+endmodule