APA102.h

00001 #ifndef MBED_APA102_H
00002 
00003 #define MBED_PING_H
00004  
00005 #include "mbed.h"
00006 
00007 
00008 
00009 /** Create an APA102 Object 
00010     */ 
00011  class APA102{
00012   public:
00013 /** Create an APA102 object connected to the specified mosi,miso,sclk pins
00014     *
00015     * @param mosi : SPI Master Out Slave In pin
00016     * @param miso : SPI Master In Slave Out pin (ignored)
00017     * @param sclk : SPI Clock
00018     * @param rate : SPI Rate
00019     */
00020      APA102(PinName mosi,PinName miso,PinName sclk,int rate);
00021        
00022 /** Set the Buffer
00023      *
00024      * @param buffer[] : a buffer of unsigned integers (4 bytes) *Rows*Stride in size
00025      * @param Rows     : Number of Rows
00026      * @param Cols     : Number of Columns
00027      * @param Stride   : The actual number of columns (useful for data alignment)
00028      * @param Offset   : The offset into a row
00029      * @param ZigZag   : A boolean, do we alternate count up/ count down per row?
00030      * @param Wrap     : A boolean, do we wrap if (Offset+Cols) > Stride? (handy for scrolling messages)
00031      */
00032      void SetBuffer(unsigned int Buffer[],int Rows,int Cols, int Stride,int Offset, bool ZigZag,bool Wrap); 
00033      
00034 /** Repaint the Strip
00035      *
00036      * @param none
00037      */
00038      void Repaint();
00039      
00040 /** Create an IRGB helper function to construct a 4 byte LED Frame
00041     *
00042     * @param I : 5 bits of intensity (0,1,2,...,31)
00043     * @param R : 8 bits of Red   (0,1,...,255)
00044     * @param G : 8 bits of Green (0,1,...,255)
00045     * @param B : 8 bits of Blue  (0,1,...,255)
00046     */
00047  
00048 int IRGB(unsigned char I,unsigned char R,unsigned char G,unsigned char B) {
00049      return ((0xE0 + 0x1F&I)<<24)|((0xFF&R)<<16)|((0xFF&G)<<8)|(0xFF&B);}
00050      
00051   protected:
00052   
00053     SPI _spi;
00054   private: 
00055     int NR;
00056     int NC;
00057     int NS;
00058     int off;
00059     bool ZF;
00060     bool WF;
00061     unsigned int * Buf;
00062  };
00063  
00064 #endif