enc28j60.i

Control ENC28J60 codevision

unsigned char   enc28j60ReadOp(unsigned char op, unsigned char address);
void            enc28j60WriteOp(unsigned char op, unsigned char address, unsigned char data);
void            enc28j60ReadBuffer(unsigned int len, unsigned char* data);
void            enc28j60WriteBuffer(unsigned int len, unsigned char* data);
void            enc28j60SetBank(unsigned char address);
unsigned char   enc28j60Read(unsigned char address);
void            enc28j60Write(unsigned char address, unsigned char data);
void            enc28j60PhyWrite(unsigned char address, unsigned int data);
void            enc28j60clkout(unsigned char clk);
void            enc28j60Init(unsigned char* macaddr);
void            enc28j60PacketSend(unsigned int len, unsigned char* packet);
unsigned int    enc28j60PacketReceive(unsigned int maxlen, unsigned char* packet);
unsigned char   enc28j60getrev(void);

#pragma used+
sfrb PINF=0;
sfrb PINE=1;
sfrb DDRE=2;
sfrb PORTE=3;
sfrb ADCL=4;
sfrb ADCH=5;
sfrw ADCW=4;      
sfrb ADCSRA=6;
sfrb ADMUX=7;
sfrb ACSR=8;
sfrb UBRR0L=9;
sfrb UCSR0B=0xa;
sfrb UCSR0A=0xb;
sfrb UDR0=0xc;
sfrb SPCR=0xd;
sfrb SPSR=0xe;
sfrb SPDR=0xf;
sfrb PIND=0x10;
sfrb DDRD=0x11;
sfrb PORTD=0x12;
sfrb PINC=0x13;
sfrb DDRC=0x14;
sfrb PORTC=0x15;
sfrb PINB=0x16;
sfrb DDRB=0x17;
sfrb PORTB=0x18;
sfrb PINA=0x19;
sfrb DDRA=0x1a;
sfrb PORTA=0x1b;
sfrb EECR=0x1c;
sfrb EEDR=0x1d;
sfrb EEARL=0x1e;
sfrb EEARH=0x1f;
sfrw EEAR=0x1e;   
sfrb SFIOR=0x20;
sfrb WDTCR=0x21;
sfrb OCDR=0x22;
sfrb OCR2=0x23;
sfrb TCNT2=0x24;
sfrb TCCR2=0x25;
sfrb ICR1L=0x26;
sfrb ICR1H=0x27;
sfrw ICR1=0x26;   
sfrb OCR1BL=0x28;
sfrb OCR1BH=0x29;
sfrw OCR1B=0x28;  
sfrb OCR1AL=0x2a;
sfrb OCR1AH=0x2b;
sfrw OCR1A=0x2a;  
sfrb TCNT1L=0x2c;
sfrb TCNT1H=0x2d;
sfrw TCNT1=0x2c;  
sfrb TCCR1B=0x2e;
sfrb TCCR1A=0x2f;
sfrb ASSR=0x30;
sfrb OCR0=0x31;
sfrb TCNT0=0x32;
sfrb TCCR0=0x33;
sfrb MCUCSR=0x34;
sfrb MCUCR=0x35;
sfrb TIFR=0x36;
sfrb TIMSK=0x37;
sfrb EIFR=0x38;
sfrb EIMSK=0x39;
sfrb EICRB=0x3a;
sfrb XDIV=0x3c;
sfrb SPL=0x3d;
sfrb SPH=0x3e;
sfrb SREG=0x3f;
#pragma used-

#asm
	#ifndef __SLEEP_DEFINED__
	#define __SLEEP_DEFINED__
	.EQU __se_bit=0x20
	.EQU __sm_mask=0x1C
	.EQU __sm_powerdown=0x10
	.EQU __sm_powersave=0x18
	.EQU __sm_standby=0x14
	.EQU __sm_ext_standby=0x1C
	.EQU __sm_adc_noise_red=0x08
	.SET power_ctrl_reg=mcucr
	#endif
#endasm

#pragma used+

void delay_us(unsigned int n);
void delay_ms(unsigned int n);

#pragma used-

unsigned char Enc28j60Bank;
unsigned int  NextPacketPtr;

unsigned char enc28j60ReadOp(unsigned char op, unsigned char address)
{
PORTB.0=0;

SPDR = op | (address & 0x1F);
while(!(SPSR&(1<<7)));

SPDR = 0x00;
while(!(SPSR&(1<<7)));

if(address & 0x80)
{
SPDR = 0x00;
while(!(SPSR&(1<<7)));
}

PORTB.0=1 ;
return(SPDR);
}
void enc28j60WriteOp(unsigned char op, unsigned char address, unsigned char data)
{
PORTB.0=0;

SPDR = op | (address & 0x1F);
while(!(SPSR&(1<<7)));

SPDR = data;
while(!(SPSR&(1<<7)));
PORTB.0=1 ;
}
void enc28j60ReadBuffer(unsigned int len, unsigned char* data)
{
PORTB.0=0;

SPDR = 0x3A;
while(!(SPSR&(1<<7)));
while(len)
{
len--;

SPDR = 0x00;
while(!(SPSR&(1<<7)));
*data = SPDR;
data++;
}
*data='\0';
PORTB.0=1 ;
}
void enc28j60WriteBuffer(unsigned int len, unsigned char* data)
{
PORTB.0=0;

SPDR = 0x7A;
while(!(SPSR&(1<<7)));
while(len)
{
len--;

SPDR = *data;
data++;
while(!(SPSR&(1<<7)));
}
PORTB.0=1 ;
}
void enc28j60SetBank(unsigned char address)
{

if((address & 0x60) != Enc28j60Bank)
{

enc28j60WriteOp(0xA0, 0x1F, (0x02|0x01));
enc28j60WriteOp(0x80, 0x1F, (address & 0x60)>>5);
Enc28j60Bank = (address & 0x60);
}
}
unsigned char enc28j60Read(unsigned char address)
{

enc28j60SetBank(address);

return enc28j60ReadOp(0x00, address);
}
void enc28j60Write(unsigned char address, unsigned char data)
{

enc28j60SetBank(address);

enc28j60WriteOp(0x40, address, data);
}
void enc28j60PhyWrite(unsigned char address, unsigned int data)
{

enc28j60Write((0x14|0x40|0x80), address);

enc28j60Write((0x16|0x40|0x80), data);
enc28j60Write((0x17|0x40|0x80), data>>8);

while(enc28j60Read((0x0A|0x60|0x80)) & 0x01){
delay_us(15);
}
}
void enc28j60clkout(unsigned char clk)
{

enc28j60Write((0x15|0x60), clk & 0x7);
}
void enc28j60Init(unsigned char* macaddr)
{

DDRB.0=1;
PORTB.0=1 ; 
DDRB.2=1;    
DDRB.1=1;    
DDRB.3=0;    
PORTB.2=0;    
PORTB.1=0;

SPCR = (1<<6)|(1<<4)|(1<<0);
SPSR |= (1<<0);

enc28j60WriteOp(0xFF, 0, 0xFF);
delay_ms(50);

NextPacketPtr = 0x0;

enc28j60Write((0x08|0x00), 0x0&0xFF);
enc28j60Write((0x09|0x00), 0x0>>8);

enc28j60Write((0x0C|0x00), 0x0&0xFF);
enc28j60Write((0x0D|0x00), 0x0>>8);

enc28j60Write((0x0A|0x00), (0x1FFF-0x0600-1)&0xFF);
enc28j60Write((0x0B|0x00), (0x1FFF-0x0600-1)>>8);

enc28j60Write((0x04|0x00), (0x1FFF-0x0600)&0xFF);
enc28j60Write((0x05|0x00), (0x1FFF-0x0600)>>8);

enc28j60Write((0x06|0x00), 0x1FFF&0xFF);
enc28j60Write((0x07|0x00), 0x1FFF>>8);

enc28j60Write((0x18|0x20), 0x80|0x20|0x10);
enc28j60Write((0x08|0x20), 0x3f);
enc28j60Write((0x09|0x20), 0x30);
enc28j60Write((0x10|0x20), 0xf9);
enc28j60Write((0x11|0x20), 0xf7);

enc28j60Write((0x00|0x40|0x80), 0x01|0x08|0x04);

enc28j60Write((0x01|0x40|0x80), 0x00);

enc28j60WriteOp(0x80, (0x02|0x40|0x80), 0x20|0x10|0x02);

enc28j60Write((0x06|0x40|0x80), 0x12);
enc28j60Write((0x07|0x40|0x80), 0x0C);

enc28j60Write((0x04|0x40|0x80), 0x12);

enc28j60Write((0x0A|0x40|0x80), 1500        &0xFF);    
enc28j60Write((0x0B|0x40|0x80), 1500        >>8);

enc28j60Write((0x04|0x60|0x80), macaddr[0]);
enc28j60Write((0x05|0x60|0x80), macaddr[1]);
enc28j60Write((0x02|0x60|0x80), macaddr[2]);
enc28j60Write((0x03|0x60|0x80), macaddr[3]);
enc28j60Write((0x00|0x60|0x80), macaddr[4]);
enc28j60Write((0x01|0x60|0x80), macaddr[5]);

enc28j60PhyWrite(0x10, 0x0100);

enc28j60SetBank(0x1F);

enc28j60WriteOp(0x80, 0x1B, 0x80|0x40);

enc28j60WriteOp(0x80, 0x1F, 0x04);
}

unsigned char enc28j60getrev(void)
{
return(enc28j60Read((0x12|0x60)));
}
void enc28j60PacketSend(unsigned int len, unsigned char* packet)
{

enc28j60Write((0x02|0x00), (0x1FFF-0x0600)&0xFF);
enc28j60Write((0x03|0x00), (0x1FFF-0x0600)>>8);

enc28j60Write((0x06|0x00), ((0x1FFF-0x0600)+len)&0xFF);
enc28j60Write((0x07|0x00), ((0x1FFF-0x0600)+len)>>8);

enc28j60WriteOp(0x7A, 0, 0x00);

enc28j60WriteBuffer(len, packet);

enc28j60WriteOp(0x80, 0x1F, 0x08);

if( (enc28j60Read(0x1C) & 0x02) ){
enc28j60WriteOp(0xA0, 0x1F, 0x08);
}
}

unsigned int enc28j60PacketReceive(unsigned int maxlen, unsigned char* packet)
{
unsigned int rxstat;
unsigned int len;

if( enc28j60Read((0x19|0x20)) ==0 ){
return(0);
}

enc28j60Write((0x00|0x00), (NextPacketPtr));
enc28j60Write((0x01|0x00), (NextPacketPtr)>>8);

NextPacketPtr  = enc28j60ReadOp(0x3A, 0);
NextPacketPtr |= enc28j60ReadOp(0x3A, 0)<<8;

len  = enc28j60ReadOp(0x3A, 0);
len |= enc28j60ReadOp(0x3A, 0)<<8;
len-=4; 

rxstat  = enc28j60ReadOp(0x3A, 0);
rxstat |= enc28j60ReadOp(0x3A, 0)<<8;

if (len>maxlen-1){
len=maxlen-1;
}

if ((rxstat & 0x80)==0){

len=0;
}else{

enc28j60ReadBuffer(len, packet);
}

enc28j60Write((0x0C|0x00), (NextPacketPtr));
enc28j60Write((0x0D|0x00), (NextPacketPtr)>>8);

enc28j60WriteOp(0x80, 0x1E, 0x40);
return(len);
}