private void TXInitialize()
{
var tmp = (uint)Cosmos.Core.Memory.Heap.Alloc(8 * 16 + 16);
TXDescs = (tmp % 16 != 0) ? (tmp + 16 - (tmp % 16)) : tmp;
for (int i = 0; i < 8; i++)
{
TXDesc *desc = (TXDesc *)(TXDescs + (i * 16));
desc->addr = 0;
desc->cmd = 0;
}
WriteRegister(REG_TXDESCLO, TXDescs);
WriteRegister(REG_TXDESCHI, 0);
WriteRegister(REG_TXDESCLEN, 8 * 16);
WriteRegister(REG_TXDESCHEAD, 0);
WriteRegister(REG_TXDESCTAIL, 0);
//Set the transmit control register (padshortpackets)
//E1000 only
//WriteRegister(REG_TCTRL, (1 << 1) | (1 << 3));
//For the e1000e
WriteRegister(REG_TCTRL, 0b0110000000000111111000011111010);
WriteRegister(REG_TIPG, 0x0060200A);
WriteRegister(REG_TXDESCTAIL, 0);
}
public override bool QueueBytes(byte[] buffer, int offset, int length)
{
//send bytes
//Copy Buffer[offset] to ptr
byte *ptr = (byte *)Cosmos.Core.Memory.Heap.Alloc((uint)length);
int a = 0;
for (int i = offset; i < offset + length; i++)
{
ptr[a] = buffer[i];
a++;
}
TXDesc *desc = (TXDesc *)(TXDescs + (TXCurr * 16));
desc->addr = (ulong)ptr;
desc->length = (ushort)length;
desc->cmd = (1 << 0) | (1 << 1) | (1 << 3);
desc->status = 0;
byte _TXCurr = (byte)TXCurr;
TXCurr = (TXCurr + 1) % 8;
WriteRegister(REG_TXDESCTAIL, TXCurr);
int timeout = 5000;
while ((desc->status & 0xF) == 0)
{
if (timeout <= 0)
{
//This is most likly a driver issue
return(false);
}
timeout--;
}
return(true);
}