// cribbed from https://blog.idorobots.org/entries/upduino-fpga-tutorial.html

module blinky (output wire led_blue,
               output wire led_green,
               output wire led_red);

    wire clk;
    SB_HFOSC inthosc(
        .CLKHFPU(1'b1), // power up 
        .CLKHFEN(1'b1), // enable
        .CLKHF(clk));   // drive the clk signal

    localparam N=23;
    reg [N:0] counter;

    always @(posedge clk)
        counter <= counter+1;

    SB_RGBA_DRV rgb (
        .RGBLEDEN (1'b1),
        .RGB0PWM  (counter[N]),
        .RGB1PWM  (counter[N-1]),
        .RGB2PWM  (counter[N-2]),
        .CURREN   (1'b1),
        .RGB0     (led_blue),
        .RGB1     (led_green),
        .RGB2     (led_red)
    );
    defparam rgb.CURRENT_MODE = "0b1";
    defparam rgb.RGB0_CURRENT = "0b000001";
    defparam rgb.RGB1_CURRENT = "0b000001";
    defparam rgb.RGB2_CURRENT = "0b000001";

endmodule