Welcher TCP Stack wird von AVRco unterstützt?

Hello Andrej,

there is no TCP/IP support in the XMega at this time. A WizNet5100 TCP/IP driver is in preparation for both the Megas and XMegas. Don't ask me when it is finished.

rolf

Hello Rolf,

I wrote the W5100 driver and sent it to you for comment many many moons ago.
No comment was received?

Neil.

Hi Rolf,
Thanks for finally responding.
Just in case you were not sure how my driver works.
Here is my driver UDP receive -

If IP_DataAv(pUDPConnection) > 0 then // Step 1
If UDP_Recv(pUDPConnection) then // Step 2
copyblock(@UDPRxBuf,@St_Rx,UDPConnection.PacketInfo.RecLen);
writeln(serout,'UDP Rx ='+St_Rx+'.');
Endif;
Endif;

Here is the same in the TINA interface
if TinaPacketReceived(UDP) then
{ ST:= '';
PTR:= @MyBuf;
for WW:= 1 to UDP^.PacketRecInfo.RecLen do
ST:= ST + Char(Ptr^++ );
endfor;
PTR:= @ST;
Ptr^:= Byte(UDP^.PacketRecInfo.RecLen);
Writeln(Serout,'UDP: ' + ST);
}
TinaResumeReceive(UDP);
endif;

To the end user, they both work in the same way.
With mine it's a 2 step process -
1) Check to see if the W5100 has anything in it's buffers.
2) Read it into the users buffer area.

Perhaps it is step 2 that you think should be done as a background process.
This is extremley fast and is basically just a SPI transfer with a few checks built in and is only done if there is a message waiting.
It would be very easy for the end user to put both of these lines into a process and then set a flag to say there is a message in their buffer.
The advantage in NOT putting the above 2 lines into a separate process is that the SPI port can also be used for other things such as SD/MMC interface. The W5100 has it's own internal buffers, so if a message came in during the SD access, the whole message would be held in the W5100 until the next main loop is performed.
None of the above can be done with the current TINA interface.

Also it would not be to hard to implement the W5100 interrupts.
This interrupt is only generated when a FULL message has been received into the W5100's internal buffers. Again very little overhead on the AVR. This basically saves the Line1 code.

The W5100 buffer allows the user to have a single combined AVR Tx/Rx buffer or a separate Tx & Rx buffer.

The overheads are very small and a system could be run on a Mega32.


I don't understand what your concerns are?


Neil.

Hallo Miparo!
Hallo Rolf!




Wie siehts denn aktuell aus? Mein Projekt ist jetzt so weit, das ich mit dem Wiznet über SPI anfangen müsste.

Gruß
Thorsten