PCA9745B.h

00001 #ifndef PCA9745B_H
00002 #define PCA9745B_H
00003 
00004 /**
00005   * SPI speed used by the mbed to communicate with the PCA9745B
00006   * The PCA9745B supports up to 10Mhz.
00007   */
00008 #define SPI_SPEED 1000000
00009 
00010 /**
00011   *  Using the TLC5 class to control an LED:
00012   *  @code
00013   *  #include "mbed.h"
00014   *  #include "PCA9745B.h"
00015   *  
00016   *  // Create the TLC5711 instance
00017   *  PCA9745B tlc(1, p7, p5);
00018   *  
00019   *  int main()
00020   *  {   
00021   *      
00022   *      while(1)
00023   *      {
00024   *         // Led1 -> R0
00025   *         tlc.setLED(0, 65535, 0, 0);
00026   *         tlc.write( );
00027   *         tlc.setLED(1, 0, 0, 0);
00028   *         tlc.write( );
00029   *         tlc.setLED(2, 0, 0, 0);
00030   *         tlc.write( );
00031   *         tlc.setLED(3, 0, 0, 0);
00032   *         tlc.write( );
00033   *         wait( 1 );
00034   *  
00035   *      }
00036   *  }
00037   *  @endcode
00038   */
00039 
00040  class PCA9745B
00041 {
00042 
00043 public:/**
00044       *  Set up the PCA9745B
00045       *  @param SCLK - The SCK pin of the SPI bus
00046       *  @param MOSI - The MOSI pin of the SPI bus
00047       *  @param number - The number of PCA9745Bs 
00048       */
00049   
00050     PCA9745B(uint8_t number, PinName SCLK, PinName MOSI);
00051 
00052   void setPWM(uint8_t chan, uint16_t pwm);
00053   void setLED(uint8_t lednum, uint16_t r, uint16_t g, uint16_t b);
00054   void write(void);    
00055         
00056   uint8_t n;
00057   
00058   private:
00059   
00060   SPI spi;
00061   
00062   uint16_t *pwmbuffer;
00063 
00064   uint8_t BCr, BCg, BCb;
00065   int8_t numdrivers;
00066 
00067 };
00068  
00069 #endif