ATMEGA 644 won´t work with WIZNET5100 WIZ812MJ

Using Arduino Microcontrollers
29

Hi Westfw,

You are right, what I posted was confusing.

I am basing all this stuff on the pins_arduino file from Mark S's core files. the pins_arduino file references a pins_duino644.cxx extension file specific for the 644(P).

Basically those arrays are what I am getting the BV value from. Not the content so much, but I assume the order of the 3 arrays are sequentially the same as each other.

When I look at all three of them:

const uint8_t PROGMEM digital_pin_to_port_PGM[] =
{
	PB, /* 0 */
	PB,
	PB,
	PB,
	PB,
	PB,
	PB,
	PB,
	PD, /* 8 */
	PD,
	PD,
	PD,
	PD,
	PD,
	PD,
	PD,
	PC, /* 16 */
	PC,
	PC,
	PC,
	PC,
	PC,
   	PC,
	PC,
	PA, /* 24 */
	PA,
	PA,
	PA,
	PA,
	PA,
	PA,
	PA  /* 31 */
};

const uint8_t PROGMEM digital_pin_to_bit_mask_PGM[] =
{
	_BV(0), /* 0, port B */
	_BV(1),
	_BV(2),
	_BV(3),
	_BV(4),
	_BV(5),
	_BV(6),
	_BV(7),
	_BV(0), /* 8, port D */
	_BV(1),
	_BV(2),
	_BV(3),
	_BV(4),
	_BV(5),
	_BV(6),
	_BV(7),
	_BV(0), /* 16, port C */
	_BV(1),
	_BV(2),
	_BV(3),
	_BV(4),
	_BV(5),
	_BV(6),
	_BV(7),
	_BV(7), /* 24, port A */
	_BV(6),
	_BV(5),
	_BV(4),
	_BV(3),
	_BV(2),
	_BV(1),
	_BV(0)
};

const uint8_t PROGMEM digital_pin_to_timer_PGM[] =
{
	NOT_ON_TIMER, 	/* 0  - PB0 */
	NOT_ON_TIMER, 	/* 1  - PB1 */
	NOT_ON_TIMER, 	/* 2  - PB2 */
	TIMER0A,     	/* 3  - PB3 */
	TIMER0B, 		/* 4  - PB4 */
	NOT_ON_TIMER, 	/* 5  - PB5 */
	NOT_ON_TIMER, 	/* 6  - PB6 */
	NOT_ON_TIMER,	/* 7  - PB7 */
	NOT_ON_TIMER, 	/* 8  - PD0 */
	NOT_ON_TIMER, 	/* 9  - PD1 */
	NOT_ON_TIMER, 	/* 10 - PD2 */
	NOT_ON_TIMER, 	/* 11 - PD3 */
	TIMER1B,     	/* 12 - PD4 */
	TIMER1A,     	/* 13 - PD5 */
	TIMER2B,     	/* 14 - PD6 */
	TIMER2A,     	/* 15 - PD7 */
	NOT_ON_TIMER, 	/* 16 - PC0 */
	NOT_ON_TIMER,   /* 17 - PC1 */
	NOT_ON_TIMER,   /* 18 - PC2 */
	NOT_ON_TIMER,   /* 19 - PC3 */
	NOT_ON_TIMER,   /* 20 - PC4 */
	NOT_ON_TIMER,   /* 21 - PC5 */
	NOT_ON_TIMER,   /* 22 - PC6 */
	NOT_ON_TIMER,   /* 23 - PC7 */
	NOT_ON_TIMER,   /* 24 - PA0 */
	NOT_ON_TIMER,   /* 25 - PA1 */
	NOT_ON_TIMER,   /* 26 - PA2 */
	NOT_ON_TIMER,   /* 27 - PA3 */
	NOT_ON_TIMER,   /* 28 - PA4 */
	NOT_ON_TIMER,   /* 29 - PA5 */
	NOT_ON_TIMER,   /* 30 - PA6 */
	NOT_ON_TIMER   /* 31 - PA7 */
}

The bottom array set has coments, suggesting PA1 is the 25th (well actually 26th as its starting from 0, but has 25 next to it) item in that list. Looking above in the 2nd array, the 25th item is _BV(6).

That is what I based it on.

Is that a stupid assumption?
I dont understand what the arrays actually do, and how the first array especially works. Anyway, that is detail I most likely dont need to know at this stage.

I have a feeling the issue I am having is with the Ethernet library, rather than the core files, as Mark S has had SPI devices running fine on the 644P.
It is however in the Ethernet library that I utilise the _BV(6), in the w5100.h file.

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); };
#elif defined(__AVR_ATmega644__) || defined(__AVR_ATmega644P__) || defined(__AVR_ATmega1284P__) 
  inline static void initSS()    { DDRA  |=  _BV(6); };
  inline static void setSS()     { PORTA &= ~_BV(6); };
  inline static void resetSS()   { PORTA |=  _BV(6); };
#else
  inline static void initSS()    { DDRB  |=  _BV(2); };
  inline static void setSS()     { PORTB &= ~_BV(2); };
  inline static void resetSS()   { PORTB |=  _BV(2); };
#endif

Any suggestions.
I am not experienced enough to really know what I am doing. Well, I am making guesses, which I dont think is the appropriate way to really resolve this.

Thanks