Diff: main.cpp

Revision:

0:8b26631e8c70

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Mar 06 19:58:34 2012 +0000
@@ -0,0 +1,121 @@
+#include "mbed.h"
+#include "ledScreen.h"
+
+// screen instance
+ledScreen screen;
+
+// sin lookup table and related functions
+unsigned char sinlut[256];
+
+void initSinLut() {
+    for (int i=0; i<256; i++)
+        sinlut[i] = cos((float)i / 256.0 * (3.14159265 * 2))*127 + 128;
+}
+
+inline unsigned char lut_sin(int x) {
+
+    return (x>0)?sinlut[x%256]:sinlut[(-x)%256];
+}
+
+
+// Example frame makes:
+
+
+//rainbow
+void makeFrame1(unsigned char* data) {
+
+    static int time=0;
+    time++;
+    
+    // override data with a intensity gradient test pattern
+    for (int x=0; x<3*16; x++) {
+        for (int y=0; y<48; y++) {
+
+            int i = (x + y*(16*3)) * 3;  // figure out the memory location
+
+            data[i] = lut_sin((x+y)*255/48+(time/2)%256); //(sin((float)(x+time)/15.0)+1.0)*128 ;   // red
+            data[i+1] = lut_sin(((x+y)*255/48+(time/2)+ 85)%256); //(sin((float)(x+time)/15.0)+1.0)*128 ;   // red
+            data[i+2] = lut_sin(((x+y)*255/48+(time/2)+170)%256); //(sin((float)(x+time)/15.0)+1.0)*128 ;   // red
+        }
+    }
+
+}
+
+//cool lines
+void makeFrame2(unsigned char* data) {
+
+    static int time=0;
+    time++;
+    
+    // override data with a intensity gradient test pattern
+    for (int x=0; x<3*16; x++) {
+        for (int y=0; y<16; y++) {
+
+            int i = (x + y*(16*3)) * 3;  // figure out the memory location
+
+            data[i] = lut_sin(x*255/48+(time)%256 + y*16); //(sin((float)(x+time)/15.0)+1.0)*128 ;   // red
+            data[i+1] = lut_sin(x*255/48+(time)%256 + y*16 + 85); //(sin((float)(x+time)/15.0)+1.0)*128 ;   // red
+            data[i+2] = lut_sin(x*255/48+(time)%256 + y*16 + 170); //(sin((float)(x+time)/15.0)+1.0)*128 ;   // red
+        }
+    }
+
+}
+
+// static gradients
+void makeFrame3(unsigned char* data) {
+
+    static int time=0;
+    time++;
+
+    // override data with a intensity gradient test pattern
+    for (int x=0; x<3*16; x++) {
+        for (int y=0; y<16; y++) {
+
+            int i = (x + y*(16*3)) * 3;  // figure out the memory location
+
+            data[i] = x*256/48; //(sin((float)(x+time)/15.0)+1.0)*128 ;   // red
+            data[i+1] = 0;  // green
+            data[i+2] = y*256/16; //(i/3)%256 ; // blue
+        }
+    }
+
+}
+
+
+void makeFrame33(unsigned char* data) {
+
+    static int time=0;
+    time++;
+
+    for (int x=0; x<3*16; x++) {
+        for (int y=0; y<48; y++) {
+
+            int i = (x + y*(16*3)) * 3;  // figure out the memory location
+
+            data[i] = x*256/48; //(sin((float)(x+time)/15.0)+1.0)*128 ;   // red
+            data[i+1] = 0;  // green
+            data[i+2] = y*256/48; //(i/3)%256 ; // blue
+        }
+    }
+}
+ 
+int main()
+{
+
+    // framebuffer on client side
+    unsigned char imageSource[256*3*3*3] = { 0 };
+    
+    // prepare sin lookup table (optional)
+    initSinLut(); 
+
+    // start the screen output, which will keep outputting the frames that are in its internal buffer (updated via .transformFrame)
+    screen.start();
+
+    while (1) {
+        
+        makeFrame1(imageSource);  // prepare framebuffer with current frame
+        screen.transformFrame(imageSource); // write framebuffer to output framebuffer
+        wait_ms(0.5); // slow down the framerate (optional)
+    }
+
+}
\ No newline at end of file