void enc28j60_writeBuffer(enc28j60_connection* c, uint16_t len, uint8_t* data){
spi_cs_on(c->cs_pin);
// issue write command
spi_write(ENC28J60_WRITE_BUF_MEM);
spi_write_buffer(data, len);
spi_cs_off(c->cs_pin);
}
void enc28j60_readBuffer(enc28j60_connection* c, uint16_t len, uint8_t* data) {
spi_cs_on(c->cs_pin);
// issue read command
spi_write(ENC28J60_READ_BUF_MEM);
spi_read_buffer(data, len);
spi_cs_off(c->cs_pin);
}
void enc28j60_writeOp(enc28j60_connection* c, uint8_t op, uint8_t address, uint8_t data){
spi_cs_on(c->cs_pin);
// issue write command
spi_write(op | (address & ADDR_MASK));
// write data
spi_write(data);
spi_cs_off(c->cs_pin);
}
void SD_SendCommand(u08 cmd, u32 arg, u08 crc, u08 * buffer, u16 len)
{
u16 i;
spi_cs_off();
spi_master_SendByte(cmd);
spi_master_SendByte(arg>>24);
spi_master_SendByte(arg>>16);
spi_master_SendByte(arg>>8);
spi_master_SendByte(arg);
spi_master_SendByte(crc);
for(i=0;i<len;i++) buffer[i] = spi_master_SendByte(0xFF);
spi_cs_on();
}
uint8_t enc28j60_readOp(enc28j60_connection* c, uint8_t op, uint8_t address) {
uint8_t ret;
spi_cs_on(c->cs_pin);
// issue read command
spi_write(op | (address & ADDR_MASK));
// read data
ret = spi_read();
// do dummy read if needed (for mac and mii, see datasheet page 29)
if(address & 0x80)
ret = spi_read();
// release CS
spi_cs_off(c->cs_pin);
return ret;
}