#include <avr/io.h>

  #include "tlc5947.h"
  

  #define DDR_DLED_CLOCK	DDRE
  #define PORT_DLED_CLOCK	PORTE
  
  #define DDR_DLED_DATA	DDRG
  #define PORT_DLED_DATA	PORTG

  #define DDR_DLED_LATCH	DDRB
  #define PORT_DLED_LATCH	PORTB

  #define PIN_DLED_CLOCK	0x08
  #define PIN_DLED_DATA	0x20
  #define PIN_DLED_LATCH	0x10

  
  void init_LED_Drivers(int nb){
      // LED drivers I/O as outputs

      DDR_DLED_CLOCK |= PIN_DLED_CLOCK;
      DDR_DLED_DATA |= PIN_DLED_DATA;
      DDR_DLED_LATCH |= PIN_DLED_LATCH;

      // Set LATCH output low

      PORT_DLED_LATCH &= ~PIN_DLED_LATCH;

  }
  
  
  void set_LED_Drivers(unsigned int pwm[], int nb){
      // Set LATCH output low

      PORT_DLED_LATCH &= ~PIN_DLED_LATCH;

      // 24 channels per TLC5947
      int i;
      for(i=DLED_CHANNELS*nb-1; i>=0; i--){
          // 12 bits per channel, send MSB first
          int v=pwm[i];
          int j;
          for(j=0; j<12; j++){
              // Set CLOCK output low

              PORT_DLED_CLOCK &= ~PIN_DLED_CLOCK;

  
              // Set DATA as stated by bit #j of i
              if(v & 0x0800)

                  PORT_DLED_DATA |= PIN_DLED_DATA;

              else

                  PORT_DLED_DATA &= ~PIN_DLED_DATA;

  
              // Set CLOCK output HIGH

              PORT_DLED_CLOCK |= PIN_DLED_CLOCK;

              v <<= 1;
          }
      }
      // Set CLOCK output low

      PORT_DLED_CLOCK &= ~PIN_DLED_CLOCK;

  
      // Set LATCH output high

      PORT_DLED_LATCH |= PIN_DLED_LATCH;

      // Set LATCH output low

      PORT_DLED_LATCH &= ~PIN_DLED_LATCH;

  }