Mega with enc28j60 module

who_took_my_nick · May 4, 2018, 9:41pm

Need to connect Mega with internet with ENC28J60 module and UIPethernet library. Problem is where to change cs pint to 53? I looked for it through whole files but or i didn't find where it is declared or it had to be declared inside sketch. I am not sure how to make Mega work with this module with UIPEthernet library.

pert · May 4, 2018, 9:57pm

CS pin is configured in Enc28j60Network.h:

github.com

ntruchsess/arduino_uip/blob/Arduino_1.5.x/UIPEthernet/src/utility/Enc28J60Network.h#L30


      
          
          
You should have received a copy of the GNU General Public License
          along with this program.  If not, see <http://www.gnu.org/licenses/>.
          */
          
          
#ifndef Enc28J60Network_H_
          #define Enc28J60Network_H_
          
          
#include "mempool.h"
          
          
#define ENC28J60_CONTROL_CS     SS // this is pin 10 on Uno and pin 53 on Mega256
          
          
#if defined(ARDUINO_ARCH_AVR)
          // AVR-specific code
          #define SPI_MOSI        MOSI
          #define SPI_MISO        MISO
          #define SPI_SCK         SCK
          #define SPI_SS          SS
          #define ENC28J60_USE_SPILIB 0
          #elif defined(ARDUINO_ARCH_SAM)
          #define ENC28J60_USE_SPILIB 1

#define ENC28J60_CONTROL_CS     SS // this is pin 10 on Uno and pin 53 on Mega256

who_took_my_nick · May 4, 2018, 11:01pm

OK, but should i change SS with 53?

pert · May 5, 2018, 2:02am

No need to. SS is already defined as 53 when you are compiling for Mega:

github.com

arduino/ArduinoCore-avr/blob/master/variants/mega/pins_arduino.h#L33


      
          #ifndef Pins_Arduino_h
          #define Pins_Arduino_h
          
          
#include <avr/pgmspace.h>
          
          
#define NUM_DIGITAL_PINS            70
          #define NUM_ANALOG_INPUTS           16
          #define analogInputToDigitalPin(p)  ((p < 16) ? (p) + 54 : -1)
          #define digitalPinHasPWM(p)         (((p) >= 2 && (p) <= 13) || ((p) >= 44 && (p)<= 46))
          
          
#define PIN_SPI_SS    (53)
          #define PIN_SPI_MOSI  (51)
          #define PIN_SPI_MISO  (50)
          #define PIN_SPI_SCK   (52)
          
          
static const uint8_t SS   = PIN_SPI_SS;
          static const uint8_t MOSI = PIN_SPI_MOSI;
          static const uint8_t MISO = PIN_SPI_MISO;
          static const uint8_t SCK  = PIN_SPI_SCK;
          
          
#define PIN_WIRE_SDA        (20)

#define PIN_SPI_SS    (53)

github.com

arduino/ArduinoCore-avr/blob/master/variants/mega/pins_arduino.h#L38


      
          #define NUM_DIGITAL_PINS            70
          #define NUM_ANALOG_INPUTS           16
          #define analogInputToDigitalPin(p)  ((p < 16) ? (p) + 54 : -1)
          #define digitalPinHasPWM(p)         (((p) >= 2 && (p) <= 13) || ((p) >= 44 && (p)<= 46))
          
          
#define PIN_SPI_SS    (53)
          #define PIN_SPI_MOSI  (51)
          #define PIN_SPI_MISO  (50)
          #define PIN_SPI_SCK   (52)
          
          
static const uint8_t SS   = PIN_SPI_SS;
          static const uint8_t MOSI = PIN_SPI_MOSI;
          static const uint8_t MISO = PIN_SPI_MISO;
          static const uint8_t SCK  = PIN_SPI_SCK;
          
          
#define PIN_WIRE_SDA        (20)
          #define PIN_WIRE_SCL        (21)
          
          
static const uint8_t SDA = PIN_WIRE_SDA;
          static const uint8_t SCL = PIN_WIRE_SCL;

static const uint8_t SS   = PIN_SPI_SS;

who_took_my_nick · May 5, 2018, 10:29am

Then, what could be wrong?
When i use ethercard library everything goes fine when i set SS pin to 53, and with UIPEthernet it is not. Wiring are the same. My guess was that i need to set SS to pin 53 for Mega.

Any suggestion what should i try?

who_took_my_nick · May 5, 2018, 4:44pm

I tried all examples from UIPEthernet and none worked. From Ethercard worked all when i set SS to 53.
It seems my wiring are ok, but problem is that my MEGA can not communicate with ENC28J60 module with UIPEthernet library through SPI pins.

Or i must set SS pin to 53 somewhere, or i must set in driver that i am using MEGA instead of UNO. Something is just not right.

pert · May 5, 2018, 5:05pm

Also posted at:

If you're going to do that then please be considerate enough to add links to the other places you cross posted. This will let us avoid wasting time due to duplicate effort and also help others who have the same questions and find your post to discover all the relevant information. When you post links please always use the chain links icon on the toolbar to make them clickable.

who_took_my_nick · May 5, 2018, 5:18pm

Sorry for that, never think about that issue.

Do you know the way to make Mega work this way or not?

pert · May 5, 2018, 5:34pm

I can tell you that I've successfully used the ENC28J60 with Arduino Mega and the UIPEthernet library but it's been a long time since I messed with that chip (I've been using W5100 and W5200 instead) so I can't remember the exact details.

Just for a lark, try wiring the ENC28J60 CS pin to pin 10 on your Mega to see if it might be hardcoded to that pin, as is the Arduino Ethernet library. That would make some sense as UIPEthernet is meant to be a drop in replacement for the Ethernet library.

who_took_my_nick · May 5, 2018, 5:40pm

Tried that. Tried to change pins in Enc28J60Network.h file. Tried sorcery. It just won't work.

Ethercard works well.

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Mega with enc28j60 module

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