Diff: APA102a.cpp

Revision:

3:bf8c63d10824

Child:

4:2afea45fce8f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/APA102a.cpp	Sat Mar 14 18:17:53 2015 +0000
@@ -0,0 +1,60 @@
+#include "APA102a.h"
+#include "mbed.h"
+
+APA102::APA102(PinName mosi,PinName miso,PinName sclk,int rate)
+        : _spi(mosi, miso, sclk)
+      
+        {
+            // Setup the spi for 8 bit data, high steady state clock,
+            // second edge capture, with a 1MHz clock rate
+            _spi.format(8,3);
+            _spi.frequency(rate);
+        } 
+        
+void APA102::SetBuffer(unsigned int Buffer[],int Rows,int Cols, int Stride,int Offset, bool ZigZag,bool Wrap)
+{
+    Buf = Buffer;
+    NR = Rows;
+    NC = Cols;
+    NS = Stride;
+    off = Offset;
+    ZF = ZigZag;
+    WF = Wrap;
+    }
+    
+void APA102::Repaint()
+{   
+    int index;
+    unsigned int val;
+    
+    _spi.write(0X00);  // Start
+    _spi.write(0X00);
+    _spi.write(0X00);
+    _spi.write(0X00);
+    
+    for(int r = 0;r<NR;r++)
+    {
+        for(int c = off;c<(NC+off);c++)
+        {
+            int cc = (WF)?(c%NS):((c<NS)?c:NS);
+            if (ZF) 
+               if((r&0x01)>0)
+                    index = r*NS + NC+off-cc;
+               else
+                    index = r*NS + cc;
+            else 
+                index = r*NS + cc;
+                
+            val = Buf[index];
+            _spi.write((val>>24)&0xFF);  
+            _spi.write((val>>16)&0xFF);  
+            _spi.write((val>>8)&0xFF);  
+            _spi.write(val&0xFF);  
+        }
+    }
+    _spi.write(0XFF); // Stop
+    _spi.write(0XFF);
+    _spi.write(0XFF);
+    _spi.write(0XFF);
+    
+}
\ No newline at end of file