How to use multiple clients with ethernet mac_tx function?

[gerrykurz]

The ethernet layer 2 mac component documentation says that the full implementation will allow multiple clients.

How do two clients use the mac_tx function?

Is it by using different tx channel ends of the array of tx channel ends that are passed to the ethernet_server function?

Is there a limit to the number of clients or the size of this channel end array?

[Andy]

Hi Gerry,

Is it by using different tx channel ends of the array of tx channel ends that are passed to the ethernet_server function?

That's right.

Is there a limit to the number of clients or the size of this channel end array?

The limit is defined by

Code: Select all

#define MAX_ETHERNET_CLIENTS

which can be found in ethernet_conf.h or avb_conf.h (if an AVB design).

[gerrykurz]

How do you get the text framing in your reply and the sub window to put code into?

Here is the ethernet_config.h file in the Low Level Ethernet Demo code that I am using.

Code: Select all

// Copyright (c) 2011, XMOS Ltd, All rights reserved
// This software is freely distributable under a derivative of the
// University of Illinois/NCSA Open Source License posted in
// LICENSE.txt and at <http://github.xcore.com/>

#ifdef CONFIG_FULL

#define ETHERNET_DEFAULT_IMPLEMENTATION full

#define MAX_ETHERNET_PACKET_SIZE (1518)

#define MAX_ETHERNET_CLIENTS   (4)    

#else

#define ETHERNET_DEFAULT_IMPLEMENTATION lite

#endif

Where is CONFIG_FULL defined?

I am doing a FULL build but the second ethernet tx client is not working. I have confirmed this by swapping the channel between the two clients.

Here is my main function:

Code: Select all

int main()
{
  chan rx[1], tx[2], DownPort1Rx[1], DownPort1Tx[1], packet_channel_up, packet_channel_down;

  par
    {
      //::ethernet
      on ETHERNET_DEFAULT_TILE:
      {
        char mac_address[6];
        otp_board_info_get_mac(otp_ports, 0, mac_address);
        eth_phy_reset(eth_rst);
        smi_init(smi);
        eth_phy_config(1, smi);
        ethernet_server(mii,
                        null,
                        mac_address,
                        rx, 1,
                        tx, 1);
      }
      //::

      //::demo
//      on ETHERNET_DEFAULT_TILE : demo(tx[0], rx[0]);
      on ETHERNET_DEFAULT_TILE: demo(tx[1], rx[0], packet_channel_down);
      on ETHERNET_DEFAULT_TILE: downlink_repeater (tx[0], packet_channel_up);

When downlink_repeater uses tx[0] it is able to transmit but demo using tx[1] is not
When demo uses tx[0] it transmits but downlink_repeater using tx[1] does not

Any suggestions?

[gerrykurz]

Never mind about the code tags question, I figured it out.

[gerrykurz]

Also figured out the multiple client issue......

[sethu_jangala]

Have a look at the Ethernet MAC library application notes in the following link, if you need more information:

https://www.xmos.com/download/public/AN ... 0.0%29.pdf