Revision 1:bf4d674d3692, committed 2014-08-18

Comitter:

chris

Date:

Mon Aug 18 13:27:10 2014 +0000

Parent:

0:6b847e039b3b

Child:

2:57db905622ca

Commit message:

Rotate buffer using offsets

Changed in this revision

--- a/PixelArray.lib	Wed Aug 06 09:34:24 2014 +0000
+++ b/PixelArray.lib	Mon Aug 18 13:27:10 2014 +0000
@@ -1,1 +1,1 @@
-http://mbed.org/users/chris/code/PixelArray/#41b9f8ec0b6a
+http://mbed.org/users/chris/code/PixelArray/#b45a70faaa83

--- a/WS2812.lib	Wed Aug 06 09:34:24 2014 +0000
+++ b/WS2812.lib	Mon Aug 18 13:27:10 2014 +0000
@@ -1,1 +1,1 @@
-http://mbed.org/users/chris/code/WS2812/#b230e85fc5e7
+http://mbed.org/users/chris/code/WS2812/#a07522fe36d4

--- a/main.cpp	Wed Aug 06 09:34:24 2014 +0000
+++ b/main.cpp	Mon Aug 18 13:27:10 2014 +0000
@@ -7,37 +7,51 @@
 WS2812 ws(p5,WS2812_BUF);
 PixelArray px(WS2812_BUF);
 
+DigitalOut led(LED1);
+
 int main()
 {
 
+    int ctr=0;
     ws.useII(2); // use per-pixel intensity scaling
 
     // set up the colours we want to draw with
     int colorbuf[6] = {0x2f0000,0x2f2f00,0x002f00,0x002f2f,0x00002f,0x2f002f};
 
-    while(1) {
 
-        // h is the starting point, incrementing makes the rendered buffer rotate
-        for (int h=0; h<60; h++) {
+    int h=0;
 
-            // for each of the colours (j) write out 10 of them
-            // the pixel get written at the rotation offset, plus 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((h+(i*10)+j)%60,colorbuf[i]);
-                }
-            }
-
-            // now all the colours are computed, add a fade effect
-            // compute and write the II value for each pixel
-            for (int j=0; j<60; j++) {
-                // px.SetI(pixel position, II value)
-                px.SetI(    (h+j)%60,   0xf+(0xf*(j%10)));
-            }
-
-            ws.write(px.getBuf()); // write out the buffer
-            wait(0.05);
+    // for each of the colours (j) write out 10 of them
+    // the pixel get written at the rotation offset, plus 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((h+(i*10)+j)%60,colorbuf[i]);
         }
     }
+
+    // now all the colours are computed, add a fade effect
+    // compute and write the II value for each pixel
+    for (int j=0; j<60; j++) {
+        // px.SetI(pixel position, II value)
+        px.SetI(    (h+j)%60,   0xf+(0xf*(j%10)));
+    }
+
+    // the buffer is written
+    // rotate by writing it out with an increasing offset
+
+
+    while (1) {
+        for (int z=59; z >= 0 ; z--) {
+            ws.write_offsets(px.getBuf(),z,z,z); // write out the buffer
+            wait(0.075);
+            if (ctr==1000) {
+                ctr=0;
+                led=!led;
+            } else {
+                ctr++;
+            }
+        }
+    }
+
 }