/*
* Function: RecvFrame
* Description: Receive and buffer an entire Ethernet frame.
*/
public static uint RecvFrame(CircularFrameBuffer cfb)
{
// The start condition
var doneReading = false;
// Local variables - counters
var cnt = 0U;
uint psize = 0;
while (!doneReading)
{
if (Emu.s_axis_tvalid && cfb.CanPush() && Emu.s_axis_tready) // Receive data
{
cfb.PushData.Tkeep = Emu.s_axis_tkeep;
cfb.PushData.Tlast = Emu.s_axis_tlast;
cfb.PushData.Tdata0 = Emu.s_axis_tdata_0;
cfb.PushData.Tdata1 = Emu.s_axis_tdata_1;
cfb.PushData.Tdata2 = Emu.s_axis_tdata_2;
cfb.PushData.Tdata3 = Emu.s_axis_tdata_3;
cfb.PushData.TuserHi = Emu.s_axis_tuser_hi;
cfb.PushData.TuserLow = Emu.s_axis_tuser_low;
Emu.s_axis_tready = !Emu.s_axis_tlast;
cfb.Push(cfb.PushData);
psize = cnt++;
// Condition to stop receiving data
doneReading = Emu.s_axis_tlast || !Emu.s_axis_tvalid;
if (!cfb.CanPush()) // Buffer is full, stop receiving data
{
Emu.s_axis_tready = false;
}
}
else if (!cfb.CanPush()) // Buffer is still full
{
Emu.s_axis_tready = false;
}
else if (!Emu.s_axis_tready) // Restart receiving data
{
Emu.s_axis_tready = true;
}
//Kiwi.Pause();
}
Emu.PktIn++;
Emu.s_axis_tready = false;
return(psize);
}
/*
* Function: RecvOne
* Description: Receive and buffer a single segment of the ethernet frame.
*/
public static bool RecvOne(CircularFrameBuffer cfb, bool stop, bool wait = false)
{
Emu.s_axis_tready = false;
Emu.Status = 1;
while (wait)
{
wait = !Emu.s_axis_tvalid;
}
bool cont = !stop;
if (Emu.s_axis_tvalid && cfb.CanPush())
{
Emu.s_axis_tready = true;
cfb.PushData.Tkeep = Emu.s_axis_tkeep;
cfb.PushData.Tlast = Emu.s_axis_tlast;
cfb.PushData.Tdata0 = Emu.s_axis_tdata_0;
cfb.PushData.Tdata1 = Emu.s_axis_tdata_1;
cfb.PushData.Tdata2 = Emu.s_axis_tdata_2;
cfb.PushData.Tdata3 = Emu.s_axis_tdata_3;
cfb.PushData.TuserHi = Emu.s_axis_tuser_hi;
cfb.PushData.TuserLow = Emu.s_axis_tuser_low;
Emu.s_axis_tready = cont;
cfb.Push(cfb.PushData);
Emu.Status = 2;
//Kiwi.Pause();
return(true);
}
Emu.s_axis_tready = false;
return(false);
}
