fish

1 files changed, 99 insertions, 0 deletions

diff --git a/blinky.c b/blinky.c
new file mode 100644
index 0000000..4b92d4c
--- /dev/null
+++ b/blinky.c
@@ -0,0 +1,99 @@
+/*
+* Light_WS2812 library example - RGB_blinky
+*
+* cycles one LED through red, green, blue
+*
+* This example is configured for a ATtiny85 with PLL clock fuse set and
+* the WS2812 string connected to PB4.
+*/
+
+#include "project.h"
+
+
+#define N_COLORS 288
+#define N_LEDS 24
+
+
+struct RGB color[N_COLORS];
+struct RGB led[N_LEDS];
+
+
+static int
+map (int j, int n)
+{
+  j = (255UL * j) / n;
+  if (j > 255)
+    j = 255;
+
+  return j;
+}
+
+int
+ramp (int j, int n)
+{
+
+  if ((j >= -n) && (j < 0))
+    return map (j + n, n);
+  if ((j >= 0) && (j <= n))
+    return map (n - j, n);
+
+  return 0;
+}
+
+
+static void
+setup_colors (struct RGB *colors, int n)
+{
+  int i;
+
+  int n3 = n / 3;
+
+  for (i = 0; i < n; ++i)
+    {
+      colors[i].r = ramp (((i) % n) - n3, n3);
+      colors[i].g = ramp (((i + n3) % n) - n3, n3);
+      colors[i].b = ramp (((i + n3 + n3) % n) - n3, n3);
+
+      printf ("%3d: %3d %3d %3d\n", i, colors[i].r, colors[i].g, colors[i].b);
+
+    }
+}
+
+
+
+
+int
+main (void)
+{
+  int i, j, k;
+
+  setup_clocks ();
+  stdio_init ();
+
+
+  setup_colors (color, N_COLORS);
+
+
+  i = 0;
+
+  while (1)
+    {
+
+      for (j = 0; j < N_LEDS; ++j)
+        {
+          k = (j * (N_COLORS - 1)) / (N_LEDS - 1);
+          k += i;
+          while (k >= N_COLORS)
+            k -= N_COLORS;
+
+          led[j] = color[k];
+        }
+
+      ws2812_setleds (led, N_LEDS);
+      _delay_ms (5);            // wait for 500ms.
+
+
+      i++;
+      i %= N_COLORS;
+    }
+}