HOWTO :Duemilanove+EthernetShield+TLC5940

chnicolas · November 4, 2009, 7:30pm

This is the definitive guide to have this three components connected and working together.

Arduino Duemilanove
Ethernet Shield
TLC5940

There is 3 steps to have this configuration working :

Modification of the wiring between the Duemilanove and the Ethernet shield.
Modification of the Ethernet shield library (spi.h)
Modification of the TLC5940 library (tlc_config.h)

Wiring :

TLC5940 to Duemilanove

BLANK -> PB2 (D10)
XLAT -> PB1 (D9)
SIN -> PD7 (D7)
XERR -> PD6 (D6)
SCLK -> PD4 (D4)
GSCLK -> PD3 (D3)

Ethernet shield to Duemilanove

D10 -> D8

This is easy to do , bend the pin D10 of the Ethernet shield so it doesn't connect to the duemilanove.
Connect the D10 of the ethernet shield to the D8 Ethernet shield so you can still plug and unplug the Ethernet shield

Change in SPI.h :

old

- #define SPI0_SS_BIT BIT1
- PORTB |= SPI0_SS_BIT | BIT0 ; PORTB &= ~(SPI0_SCLK_BIT|SPI0_MOSI_BIT);\
- #define IINCHIP_CS_BIT BIT0

new

- #define SPI0_SS_BIT BIT0
- PORTB |= SPI0_SS_BIT | BIT2 ; PORTB &= ~(SPI0_SCLK_BIT|SPI0_MOSI_BIT);\
- #define IINCHIP_CS_BIT BIT0

Change in tlc_config.h

old

- #define DATA_TRANSFER_MODE TLC_SPI
  new
- #define DATA_TRANSFER_MODE TLC_BITBANG

With these modification, you can use the 3 components together with their respective library.
I made a pcb with this configuration for a project and it is working fine, I can change the parameter of the TLC via a web browser

If somebody can tell me how to upload photo it will be nice.

chnicolas · December 3, 2009, 6:06am

It was missing the XERR , if you want to use it
in tlc_config.h :

old :

#define XERR_ENABLED 0

#if XERR_ENABLED
/** XERR (TLC pin 16) */
#define XERR_PIN DEFAULT_XERR_PIN
#define XERR_PORT DEFAULT_XERR_PORT
#define XERR_DDR DEFAULT_XERR_DDR
#define XERR_PINS DEFAULT_XERR_PINS
#endif

new :

#define XERR_ENABLED 1

#if XERR_ENABLED
/** XERR (TLC pin 7) */
#define XERR_PIN PD6
#define XERR_PORT PORTD
#define XERR_DDR DDRD
#define XERR_PINS PIND
#endif

system · December 14, 2009, 12:10am

Thank you for your help on this issue, I am looking to do the same thing. Where is the SPI.h file located? I'm on a mac system and cant for the life of me located this file for editing. Thanks!

chnicolas · December 14, 2009, 2:22am

Hello,
On windows it is there : \arduino\hardware\libraries\Ethernet\utility

system · January 2, 2010, 10:52am

I have done all the steps required, but it is not working for me. I get an error when I try to compile the code.

I could not find the exact strings you told to replace, I started out with this in my spi.h:

- #define SPI0_SS_BIT                                    BIT2

PORTB |= SPI0_SS_BIT; PORTB &= ~(SPI0_SCLK_BIT|SPI0_MOSI_BIT);\

#define IINCHIP_CS_BIT                              BIT2

Could that be the problem?

chnicolas · January 3, 2010, 2:53am

I think I made a small mistake in my copy / paste before .
This is the original code :

//-----------------------------------------------------------------------------
//AVR Mega168 SPI HAL
#define BIT0                                          0x01
#define BIT1                                          0x02
#define BIT2                                          0x04
#define BIT3                                          0x08
#define BIT4                                          0x10
#define BIT5                                          0x20
#define BIT6                                          0x40
#define BIT7                                          0x80

#define SPI0_SS_BIT                                    BIT2
#define SPI0_SS_DDR                                    DDRB
#define SPI0_SS_PORT                              PORTB

#define SPI0_SCLK_BIT                              BIT5
#define SPI0_SCLK_DDR                              DDRB
#define SPI0_SCLK_PORT                              PORTB

#define      SPI0_MOSI_BIT                              BIT3
#define SPI0_MOSI_DDR                              DDRB
#define SPI0_MOSI_PORT                              PORTB

#define      SPI0_MISO_BIT                              BIT4
#define SPI0_MISO_DDR                              DDRB
#define SPI0_MISO_PORT                              PORTB


#define SPI0_WaitForReceive()                        
#define SPI0_RxData()                               (SPDR)

#define SPI0_TxData(Data)                        (SPDR = Data)
#define SPI0_WaitForSend()                        while( (SPSR & 0x80)==0x00 )

#define SPI0_SendByte(Data)                        SPI0_TxData(Data);SPI0_WaitForSend()
#define SPI0_RecvBute()                              SPI0_RxData()

// PB4(MISO), PB3(MOSI), PB5(SCK), PB2(/SS)         // CS=1, waiting for SPI start // SPI mode 0, 4MHz
#define SPI0_Init()                                    DDRB  |= SPI0_SS_BIT|SPI0_SCLK_BIT|SPI0_MOSI_BIT;\
                                                            PORTB |= SPI0_SS_BIT; PORTB &= ~(SPI0_SCLK_BIT|SPI0_MOSI_BIT);\
                                                            SPCR  = 0x50  
//-----------------------------------------------------------------------------

//-----------------------------------------------------------------------------
//IInChip SPI HAL
#define IINCHIP_SpiInit                              SPI0_Init
#define IINCHIP_SpiSendData                        SPI0_SendByte      
#define IINCHIP_SpiRecvData                        SPI0_RxData


#define IINCHIP_CS_BIT                              BIT2
#define IINCHIP_CS_DDR                              DDRB
#define IINCHIP_CS_PORT                              PORTB

#define IINCHIP_CSInit()                              (IINCHIP_CS_DDR |= IINCHIP_CS_BIT)
#define IINCHIP_CSon()                              (IINCHIP_CS_PORT |= IINCHIP_CS_BIT)
#define IINCHIP_CSoff()                              (IINCHIP_CS_PORT &= ~IINCHIP_CS_BIT)
//-----------------------------------------------------------------------------

This is the new code

//-----------------------------------------------------------------------------
//AVR Mega168 SPI HAL
#define BIT0                                          0x01
#define BIT1                                          0x02
#define BIT2                                          0x04
#define BIT3                                          0x08
#define BIT4                                          0x10
#define BIT5                                          0x20
#define BIT6                                          0x40
#define BIT7                                          0x80

#define SPI0_SS_BIT                                    BIT0
#define SPI0_SS_DDR                                    DDRB
#define SPI0_SS_PORT                              PORTB

#define SPI0_SCLK_BIT                              BIT5
#define SPI0_SCLK_DDR                              DDRB
#define SPI0_SCLK_PORT                              PORTB

#define      SPI0_MOSI_BIT                              BIT3
#define SPI0_MOSI_DDR                              DDRB
#define SPI0_MOSI_PORT                              PORTB

#define      SPI0_MISO_BIT                              BIT4
#define SPI0_MISO_DDR                              DDRB
#define SPI0_MISO_PORT                              PORTB


#define SPI0_WaitForReceive()                        
#define SPI0_RxData()                               (SPDR)

#define SPI0_TxData(Data)                        (SPDR = Data)
#define SPI0_WaitForSend()                        while( (SPSR & 0x80)==0x00 )

#define SPI0_SendByte(Data)                        SPI0_TxData(Data);SPI0_WaitForSend()
#define SPI0_RecvBute()                              SPI0_RxData()

// PB4(MISO), PB3(MOSI), PB5(SCK), PB2(/SS)         // CS=1, waiting for SPI start // SPI mode 0, 4MHz
#define SPI0_Init()                                    DDRB  |= SPI0_SS_BIT|SPI0_SCLK_BIT|SPI0_MOSI_BIT;\
                                                            PORTB |= SPI0_SS_BIT | BIT2 ; PORTB &= ~(SPI0_SCLK_BIT|SPI0_MOSI_BIT);\
                                                            SPCR  = 0x50
//-----------------------------------------------------------------------------

//-----------------------------------------------------------------------------
//IInChip SPI HAL
#define IINCHIP_SpiInit                              SPI0_Init
#define IINCHIP_SpiSendData                        SPI0_SendByte      
#define IINCHIP_SpiRecvData                        SPI0_RxData


#define IINCHIP_CS_BIT                              BIT0
#define IINCHIP_CS_DDR                              DDRB
#define IINCHIP_CS_PORT                              PORTB

#define IINCHIP_CSInit()                        (IINCHIP_CS_DDR |= IINCHIP_CS_BIT)
#define IINCHIP_CSon()                              (IINCHIP_CS_PORT |= IINCHIP_CS_BIT)
#define IINCHIP_CSoff()                              (IINCHIP_CS_PORT &= ~IINCHIP_CS_BIT)
//-----------------------------------------------------------------------------

Just replace your spi.h with the new code

Sorry for the bad code from the previous post.

system · January 3, 2010, 5:43pm

Thanks! It's working for me now.

I needed it for a university project, I designed everything thinking that this would be possible. This post saved my life

chnicolas · October 6, 2010, 10:18pm

I was looking at my project and tried to use the version 21 of Arduino to compile it.
I have it compiling but without these modifications for the ethernet and tlc5940 library
As the SPI files has changed, I cannot find where to make my previous modification.
If somebody as an idea, let me know meanwhile I will continue to look how to do it.

system · October 11, 2010, 2:21pm

Hi toffe82

just realized that I've started a second topic although you already asked the same question here:

http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1286641287

Actually, I though that you're going to be the one that solves the problem I've been using your modifications for spi.h in Arduino 0018 without any problems. I hope that someone has a hint?

mjb

chnicolas · October 13, 2010, 5:30pm

I find the solution but I can't test everything because I have too much change on my project with the new arduino0021
I have the Ethernet working.
If somebody can check the whole thing it would be nice.

First : the TLC5940 stay the same as in version with arduino0017.
second : 2 changes , one in w5100.H and the other one in pins_arduino.h

w5100.H, in the folder \arduino-0021\libraries\Ethernet\utility

old code :

private:
#if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
  inline static void initSS()    { DDRB  |=  _BV(4); };
  inline static void setSS()     { PORTB &= ~_BV(4); };
  inline static void resetSS()   { PORTB |=  _BV(4); };
#else
  inline static void initSS()    { DDRB  |=  _BV(2); };
  inline static void setSS()     { PORTB &= ~_BV(2); };
  inline static void resetSS()   { PORTB |=  _BV(2); };
#endif

new code :

private:
#if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
  inline static void initSS()    { DDRB  |=  _BV(4); };
  inline static void setSS()     { PORTB &= ~_BV(4); };
  inline static void resetSS()   { PORTB |=  _BV(4); };
#else
  inline static void initSS()    { DDRB  |=  _BV(0); };
  inline static void setSS()     { PORTB &= ~_BV(0); };
  inline static void resetSS()   { PORTB |=  _BV(0); };
#endif

pins_arduino.h in the folder \arduino-0021\hardware\arduino\cores\arduino

old code

#if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
const static uint8_t SS   = 53;
const static uint8_t MOSI = 51;
const static uint8_t MISO = 50;
const static uint8_t SCK  = 52;
#else
const static uint8_t SS   = 10;
const static uint8_t MOSI = 11;
const static uint8_t MISO = 12;
const static uint8_t SCK  = 13;
#endif

new code

#if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
const static uint8_t SS   = 53;
const static uint8_t MOSI = 51;
const static uint8_t MISO = 50;
const static uint8_t SCK  = 52;
#else
const static uint8_t SS   = 8;
const static uint8_t MOSI = 11;
const static uint8_t MISO = 12;
const static uint8_t SCK  = 13;
#endif

There must be a better way but I don't see.
the problem there is that we touch 2 standard library so if you want to reuse them in another project, you have to put
them back to the original.

system · January 6, 2011, 7:14pm

Sorry for the delay...

I just made the changes as you described, using Arduino 022. Works like a charm! Thanks toffe82.

At the moment I'm fine with changing standard libraries for my project - but I agree, it would be nice to have a non-invasive solution to this in the future!

mjb

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HOWTO :Duemilanove+EthernetShield+TLC5940

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