Diff: GEColorEffects.cpp

Revision:

0:3f51641c4e69

Child:

1:e56bc0a8c273

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/GEColorEffects.cpp	Mon Feb 16 20:27:53 2015 +0000
@@ -0,0 +1,75 @@
+#include "GEColorEffects.h"
+
+GEColorEffects::GEColorEffects(PinName pin, int size) : size(size), gpo(pin) {
+    
+}
+
+
+void GEColorEffects::write(int buf[], bool eightBit) {
+    int l, r, g, b;
+    for (int i = 0; i < size; i++) {
+        l = (buf[i] >> 24) & 0xFF;
+        r = (buf[i] >> 16) & 0xFF;
+        g = (buf[i] >> 8) & 0xFF;
+        b = buf[i] & 0xFF;
+        
+        if (eightBit) {
+            sendFrame(i, l, r >> 4, g >> 4, b >> 4);
+        } else {
+            sendFrame(i, l, r, g, b);
+        }
+    }
+}
+
+// GPIO output to send a logical 0
+void GEColorEffects::sendZero() {
+    gpo = 0;
+    wait_us(10);
+    gpo = 1;
+    wait_us(20);
+}
+ 
+// GPIO output to send a logical 1
+void GEColorEffects::sendOne() {
+    gpo = 0;
+    wait_us(20);
+    gpo = 1;
+    wait_us(10);
+}
+ 
+// Parse data value to serial process 0/1's
+void GEColorEffects::sendData(unsigned char data, int length) {
+    unsigned int data_bit;
+ 
+    for (int i = (length - 1); i >= 0; i--) {
+        data_bit = (data >> i) & 0x01;
+        if (data_bit == 0) {
+            sendZero();
+        } else {
+            sendOne();
+        }
+    }
+}
+ 
+// Send frame of data to control a single pixel
+void GEColorEffects::sendFrame(unsigned char address, unsigned char lumm, unsigned char R, unsigned char G, unsigned char B) {
+// Send "1" value to start Frame
+    sendOne();
+// Send Address
+    sendData(address,6);
+// Send Luminosity
+    sendData(lumm,8);
+// Send Blue 4-bits
+    sendData(B,4);
+// Send Green 4-bits
+    sendData(G,4);
+// Send Red 4-bits
+    sendData(R,4);
+// Send End of Frame Marker
+    endFrame();
+}
+
+void GEColorEffects::endFrame() {
+    gpo = 0;
+    wait_us(30);
+}
\ No newline at end of file