WARP Project Forums - Wireless Open-Access Research Platform

One-on-one support is not available via web conference. We are happy to answer questions here on the forums. You will need to describe exactly what you've tried, what you expected and what you actually observed.

Again, that is not nearly enough detail about the steps you followed for us to provide any useful feedback. Specific questions:

1) When both boards are booted, do they show different numbers in the hex display?
2) Do any LEDs on the board light up or blink when you are trying to ping? Which LEDs?
3) Are the PCs on the same subnet? If you connect the two PCs together via Ethernet directly, leaving WARP out of it, can the two computers ping each other on that subnet?

Also, the ARP table entry for broadcast packets isn't needed for the OFDM Reference Design or 802.11 Reference Design. That's needed for old versions of WARPLab that send Ethernet triggers to sync processing at multiple nodes.

7.    When sometimes we are able to ping both nodes We are unable to stream video. Please explain the steps to stream a video.

If pings ever work it means the design has been downloaded correctly. You will need to debug why the wireless transmissions are not being received reliably. NoMAC is a very simple application- it does not send ACKs, it does not retransmit after failed receptions and it does not sense the medium before transmitting. Any interference or other degradation of the wireless medium will severely impact the performance NoMAC achieves. I would suggest trying a different wireless channel, verifying the connection of the antennas, verifying the antennas are not damaged, etc. You may also consider an alternate MAC implementation. CSMAMAC, for example, implements a much more robust protocol (carrier sensing, re-transmissions after failed Tx, etc).

The best place to start is the Getting Started section of the webpage.  If you go through the information and tutorials, then you will be ready to explore the reference designs and the examples that utilize the reference designs.

The Getting Started section of the webpage will allow you to become familiar with the hardware and the tools that you will use if you ever want to deviate from the Reference Bitstreams in the release. 

If you are only going to use the Reference Bitstreams, you should still familiarize yourself with the WARP v3 hardware.  After that you can use the WARPLab Quick Start guide and then dig in to the WARPLab Examples.

Hi,
     I am trying to configure WARP v3 FPGA with the WARPLab 7 reference design. for node 0,I set up the dip switch as 0000
but after programming the node the right Hex display showing the value 1.same way for dip switch configuration 0001 hex display showing 2.I am not getting how to solve this problem.as a result when I tried to run the following command in matlab

N = 2;
nodes = wl_initNodes(N);
wl_nodeCmd(nodes,'identify');
disp(nodes)

it shows the following error

Error in node 1 with ID = 0:
ME =

  MException

  Properties:
    identifier: 'wl_transport_eth_mex:send:noReply'
       message: 'maximum number of retransmissions met without reply from node'
         cause: {0x1 cell}
         stack: [6x1 struct]

  Methods

Error message follows:
maximum number of retransmissions met without reply from node

??? Error using ==> wl_initNodes at 162
The following nodes with IDs = [ 0 ] are not responding. Please ensure that the nodes have been configured with the
WARPLab bitstream.

Last edited by kanchan (2015-Mar-23 05:43:49)

Hi welsh,
    thanks you for your reply.the problem solved. initially I connect the nodes  with 100Mbps Ethernet switch.I change it to 1Gbps and now it working correctly.