Revision 2:cb82a3dc4031, committed 2015-02-12

Comitter:

bridadan

Date:

Thu Feb 12 21:55:24 2015 +0000

Parent:

1:e04a0ecefa29

Child:

3:a0545942de4f

Commit message:

K64F timings in demo

Changed in this revision

--- a/WS2812.lib	Thu Feb 12 20:20:54 2015 +0000
+++ b/WS2812.lib	Thu Feb 12 21:55:24 2015 +0000
@@ -1,1 +1,1 @@
-http://developer.mbed.org/users/bridadan/code/WS2812/#aadbf08c62a2
+http://developer.mbed.org/users/bridadan/code/WS2812/#6e647820f587

--- a/main.cpp	Thu Feb 12 20:20:54 2015 +0000
+++ b/main.cpp	Thu Feb 12 21:55:24 2015 +0000
@@ -2,15 +2,15 @@
 #include "WS2812.h"
 #include "PixelArray.h"
 
-#define WS2812_BUF 60
+#define WS2812_BUF 150
+#define NUM_COLORS 6
+#define NUM_LEDS_PER_COLOR 10
 
 PixelArray px(WS2812_BUF);
 
-// See the program page for information on the timing numbers (eg: 0, 5, 5, 0)
+// See the program page for information on the timing numbers
 // The given numbers are for the K64F
-WS2812 ws(D9,WS2812_BUF, 0, 5, 5, 0);
-
-DigitalOut led(LED1);
+WS2812 ws(D9, WS2812_BUF, 0, 5, 5, 0);
 
 int main()
 {
@@ -18,29 +18,27 @@
     ws.useII(WS2812::PER_PIXEL); // use per-pixel intensity scaling
     
     // set up the colours we want to draw with
-    int colorbuf[6] = {0x2f0000,0x2f2f00,0x002f00,0x002f2f,0x00002f,0x2f002f};
+    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<6; i++) {
-        for (int j=0; j<10; j++) {
-            px.Set(((i*10)+j)%60,colorbuf[i]);
-        }
+    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<60; j++) {
+    for (int j=0; j<WS2812_BUF; j++) {
         // px.SetI(pixel position, II value)
-        px.SetI(j%60, 0xf+(0xf*(j%10)));
+        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=59; z >= 0 ; z--) {
+        for (int z=WS2812_BUF; z >= 0 ; z--) {
             ws.write_offsets(px.getBuf(),z,z,z);
             wait(0.075);
         }