uint8_t W5100_MemReadWord(uint16_t addr, uint16_t *val) {
uint8_t low, high;
W5100_RequestSPIBus();
W5100_CS_ENABLE();
SPIWriteByte(W5100_CMD_READ);
SPIWriteByte(addr>>8); /* high address */
SPIWriteByte(addr&0xff); /* low address */
high = SPIReadByte(); /* data */
W5100_CS_DISABLE();
addr++;
W5100_CS_ENABLE();
SPIWriteByte(W5100_CMD_READ);
SPIWriteByte(addr>>8); /* high address */
SPIWriteByte(addr&0xff); /* low address */
low = SPIReadByte(); /* data */
W5100_CS_DISABLE();
W5100_ReleaseSPIBus();
*val = (high<<8)|low;
return ERR_OK;
}
uint8_t W5100_MemReadByte(uint16_t addr, uint8_t *val) {
W5100_GetBus();
SPIWriteByte(W5100_CMD_READ);
SPIWriteByte(addr>>8); /* high address */
SPIWriteByte(addr&0xff); /* low address */
*val = SPIReadByte(); /* data */
W5100_ReleaseBus();
return ERR_OK;
}
//*******************************************************************************************
//
// Function : icmp_send_request
// Description : Send ARP request packet to destination.
//
//*******************************************************************************************
BYTE enc28j60ReadOp(BYTE op, BYTE address)
{
BYTE data;
// activate CS
CSACTIVE;
// issue read command
SPISendByte(op | (address & ADDR_MASK));
// read data
data = SPIReadByte();
// do dummy read if needed (for mac and mii, see datasheet page 29)
if(address & 0x80)
{
data = SPIReadByte();
}
CSPASSIVE;
return data;
}
/////////////////////////////////////////////////////////////////////
//功 能：读RC632寄存器
//参数说明：Address[IN]:寄存器地址
//返 回：读出的值
/////////////////////////////////////////////////////////////////////
u8 ReadRawRC(u8 Address)
{
u8 ucAddr;
u8 ucResult=0;
CLR_SPI_CS;
ucAddr = ((Address<<1)&0x7E)|0x80;
SPIWriteByte(ucAddr);
ucResult=SPIReadByte();
SET_SPI_CS;
return ucResult;
}
void enc28j60ReadBuffer(uint16_t len, uint8_t* data)
{
CSACTIVE;
SPISendByte(ENC28J60_READ_BUF_MEM);
while(len)
{
len--;
*data = SPIReadByte();
data++;
}
*data='\0';
CSPASSIVE;
}
