uint8_t enc28j60_readOp(uint8_t op, uint8_t address)
{
csactive();
SPDR = op | (address & ADDR_MASK);
waitspi();
SPDR = 0x00;
waitspi();
if (address & 0x80)
{
SPDR = 0x00;
waitspi();
}
cspassive();
return SPDR;
}
void enc28j60WriteBuffer(uint16_t len, uint8_t* data)
{
CSACTIVE;
// issue write command
SPDR = ENC28J60_WRITE_BUF_MEM;
waitspi();
while(len)
{
len--;
// write data
SPDR = *data;
data++;
waitspi();
}
CSPASSIVE;
}
void enc28j60_readBuffer(uint16_t len, uint8_t* data)
{
csactive();
SPDR = RBM;
waitspi();
while (len)
{
len--;
SPDR = 0x00;
waitspi();
*data = SPDR;
data++;
}
*data='\0';
cspassive();
}
void enc28j60ReadBuffer(uint16_t len, uint8_t* data)
{
CSACTIVE;
// issue read command
SPDR = ENC28J60_READ_BUF_MEM;
waitspi();
while(len)
{
len--;
// read data
SPDR = 0x00;
waitspi();
*data = SPDR;
data++;
}
*data='\0';
CSPASSIVE;
}
/* Write a byte on SPI */
void dotmatrixSPIWrite(uint8_t data) {
uint8_t dummy = 0;
/* Wait for empty transmit buffer */
while ( !( UCSR0A & (1<<UDRE0)) );
// write data
dummy = UDR0;
UDR0 = data;
waitspi();
}
uint8_t enc28j60ReadOp(uint8_t op, uint8_t address)
{
CSACTIVE;
// issue read command
SPDR = op | (address & ADDR_MASK);
waitspi();
// read data
SPDR = 0x00;
waitspi();
// do dummy read if needed (for mac and mii, see datasheet page 29)
if(address & 0x80)
{
SPDR = 0x00;
waitspi();
}
// release CS
CSPASSIVE;
return(SPDR);
}
