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DM648 LOOPBACK

Eric Sun
Intellectual 300 points

Other Parts Discussed in Thread: TMS320DM647

Hi,All

   I have some problems with my platform of DM648.According to the EVMDM648 I designed my own PCB，but the Ethernet does't work！I try to run the example of climet.pjt  with NDK 2.0.0 and try to ping my board。but no data return.so，I want to do loopback test ，but the TMS320DM647/DM648 DSP 3 Port Switch (3PSW) Ethernet Subsystem User's Guide doesn't indicate how to do loopback test ！who can help me？Thanks a lot！

Best Regards！

  • 0
    Expert 1160 points

    Hi Eric,

    I also tried to do a loopback test and failed so far. I made some modifications based on PHY documentation and source code analysis. Now I see that packets are transmitted but nothing is received. Maybe the switch drops the responses.

    However, Krishna in his post (http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/99/p/231590/855167.aspx#855167) mentioned a loopback test, so it should be possible.

    Victor