Diff: main.cpp

Revision:

0:2024cf2d17f8

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Sep 07 14:20:53 2016 +0000
@@ -0,0 +1,47 @@
+#include "mbed.h"
+#include "WS2812.h"
+#include "PixelArray.h"
+
+#define WS2812_BUF 150
+#define NUM_COLORS 6
+#define NUM_LEDS_PER_COLOR 3
+
+PixelArray px(WS2812_BUF);
+
+// See the program page for information on the timing numbers
+// The given numbers are for the K64F
+WS2812 ws(D9, WS2812_BUF, 10, 15, 20, 25);
+//WS2812 ws(D9, WS2812_BUF, 10, 15, 20, 35);
+int main()
+{
+
+    ws.useII(WS2812::PER_PIXEL); // use per-pixel intensity scaling
+    
+    // set up the colours we want to draw with
+    int colorbuf[NUM_COLORS] = {0x2f0000,0x2f2f00,0x002f00,0x002f2f,0x00002f,0x2f002f};
+
+    // for each of the colours (j) write out 10 of them
+    // the pixels are written at the colour*10, plus the colour position
+    // all modulus 60 so it wraps around
+    for (int i = 0; i < WS2812_BUF; i++) {
+        px.Set(i, colorbuf[(i / NUM_LEDS_PER_COLOR) % NUM_COLORS]);
+    }
+
+    // now all the colours are computed, add a fade effect using intensity scaling
+    // compute and write the II value for each pixel
+    for (int j=0; j<WS2812_BUF; j++) {
+        // px.SetI(pixel position, II value)
+        px.SetI(j%WS2812_BUF, 0xf+(0xf*(j%NUM_LEDS_PER_COLOR)));
+    }
+
+
+    // Now the buffer is written, rotate it
+    // by writing it out with an increasing offset
+    while (1) {
+        for (int z=WS2812_BUF; z >= 0 ; z--) {
+            ws.write_offsets(px.getBuf(),z,z,z);
+            wait(0.075);
+        }
+    }
+
+}