1 files changed, 81 insertions, 0 deletions
diff --git a/examples/up5k_rgb/rgb.v b/examples/up5k_rgb/rgb.v
new file mode 100644
index 0000000..c83b943
--- /dev/null
+++ b/examples/up5k_rgb/rgb.v
@@ -0,0 +1,81 @@
+module top(
+  output RGB0, RGB1, RGB2
+);
+
+wire clk;
+
+SB_HFOSC inthosc (
+  .CLKHFPU(1'b1),
+  .CLKHFEN(1'b1),
+  .CLKHF(clk)
+);
+
+localparam  counter_width = 30;
+
+reg [counter_width-1:0] ctr;
+
+always@(posedge clk)
+begin
+  ctr <= ctr + 1;
+end
+
+localparam  pwm_width = 12;
+
+localparam pwm_max = (2**pwm_width) - 1;
+localparam pwm_max_div4 = (2**(pwm_width-2)) - 1;
+
+
+wire [1:0] phase = ctr[counter_width - 1 : counter_width - 2];
+wire [pwm_width-1:0] fade = ctr[counter_width - 3 : counter_width - (2 + pwm_width)];
+wire [pwm_width-1:0] fade_div4 = ctr[counter_width - 3 : counter_width - (pwm_width)];
+
+wire [pwm_width-1:0] r_val, g_val, b_val;
+
+//  Fade R->G->B->W->
+assign r_val = (phase == 0) ? pwm_max_div4 + (3 * fade_div4) :
+               (phase == 1) ? pwm_max - fade :
+               (phase == 3) ? fade_div4 :
+               0;
+              
+assign g_val = (phase == 0) ? pwm_max_div4 - fade_div4:
+               (phase == 1) ? fade :
+               (phase == 2) ? pwm_max - fade :
+               (phase == 3) ? fade_div4 :
+               0;
+
+assign b_val = (phase == 0) ? pwm_max_div4 - fade_div4:
+               (phase == 2) ? fade :
+               (phase == 3) ? pwm_max - (3 * fade_div4) :
+               0;
+
+reg [pwm_width-1:0] pwm_ctr;
+
+reg pwm_r, pwm_g, pwm_b;
+
+always@(posedge clk)
+begin
+  pwm_ctr <= pwm_ctr + 1;
+  pwm_r <= (pwm_ctr < r_val) ? 1'b1 : 1'b0;
+  pwm_g <= (pwm_ctr < g_val) ? 1'b1 : 1'b0;
+  pwm_b <= (pwm_ctr < b_val) ? 1'b1 : 1'b0;
+end
+
+SB_RGBA_DRV RGBA_DRIVER (
+  .CURREN(1'b1),
+  .RGBLEDEN(1'b1),
+  .RGB0PWM(pwm_g),
+  .RGB1PWM(pwm_b),
+  .RGB2PWM(pwm_r),
+  .RGB0(RGB0),
+  .RGB1(RGB1),
+  .RGB2(RGB2)
+);
+
+
+defparam RGBA_DRIVER.CURRENT_MODE = "0b1";
+defparam RGBA_DRIVER.RGB0_CURRENT = "0b000001";
+defparam RGBA_DRIVER.RGB1_CURRENT = "0b000011";
+defparam RGBA_DRIVER.RGB2_CURRENT = "0b000011";
+
+
+endmodule
+\ No newline at end of file