USE TLC5940 on Arduino Leonardo

The TLC5490 library (http://playground.arduino.cc/learning/TLC5940 ) should be modified to be working with Arduino Leonardo. The Solution can be found here:
http://forum.arduino.cc/index.php?topic=110394.0
I went through all the process and this solution works fine. This post is my documentation.


step by step:
1. Backup the chip_includes.h file in the 'pinouts' folder in the TLC5940 library folder, since leonardo uses different definitions of pins. Then edit the chip_includes.h as follows:
=====================================
/* Copyright blablabla*/
#ifndef TLC_CHIP_INCLUDES_H
#define TLC_CHIP_INCLUDES_H
/** \file
    Includes the chip-specfic defaults and pin definitions. */
#include <avr/io.h>
#ifndef PB0
#define PB0     PORTB0
#define PB1     PORTB1
#define PB2     PORTB2
#define PB3     PORTB3
#define PB4     PORTB4
#define PB5     PORTB5
#define PB6     PORTB6
#define PB7     PORTB7
#endif
/* Chip Specific Pinouts */
#if defined (__AVR_ATmega32U4__)
/* Leonardo */
#include "Arduino_Leonardo.h"
#else
#error "Unknown Chip!"
#endif
#endif
=====================================


2. create a file named "Arduino_Leonardo.h" and modify the file as follows:
=====================================
#ifndef TLC_Teensy_xxU4_h
#define TLC_Teensy_xxU4_h

#if DATA_TRANSFER_MODE == TLC_BITBANG
#error "If you want bitbang mode, insert pin defs here"
#endif

// MOSI (Leo outter center ICSP pin) -> SIN (TLC pin 26)
#define TLC_MOSI_PIN   2
#define TLC_MOSI_PORT   PORTB
#define TLC_MOSI_DDR   DDRB

// SCK (Leo inner center ICSP pin) -> SCLK (TLC pin 25)
#define TLC_SCK_PIN   1
#define TLC_SCK_PORT   PORTB
#define TLC_SCK_DDR   DDRB

// SS (Leo RX LED)
#define TLC_SS_PIN   0
#define TLC_SS_DDR   DDRB

// OC1A (Leo pin 9) -> XLAT (TLC pin 24)
#define XLAT_PIN   5
#define XLAT_PORT   PORTB
#define XLAT_DDR   DDRB

// OC1B (Leo pin 10) -> BLANK (TLC pin 23)
#define BLANK_PIN   6
#define BLANK_PORT   PORTB
#define BLANK_DDR   DDRB

// OC3A (Leo pin 5) -> GSCLK (TLC pin 18)
#define GSCLK_PIN   6
#define GSCLK_PORT   PORTC
#define GSCLK_DDR   DDRC
#define TLC_TIMER3_GSCLK 1

#endif
=========================================


3. Connect to Arduino Leonardo as follows:

TLC5940  to Leonardo

pin 27 to Gnd

pin 26 to MOSI (see picture)

pin 25 to SCK (see picture)

pin 24 to pin 9

pin 23 to pin 10

pin 22 to Gnd

pin 21 to +5V

pin20 to Gnd with a 2k resistor

pin 19 to +5V

pin 18 to pin 5

see picture below:

4. Connect LEDs with the positive legs to +5V and negative legs to TLC outputs.

5. finished, upload sketch.

Reference:
http://forum.arduino.cc/index.php?topic=110394.0