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Problem about c6678 PCIE !!!

RWTH
Intellectual 345 points

Hi all :

         Recently i'm using C6678 (EP)to communicate with  dm8168(RC),but now i find that the Lane 0 of C6678  has some problem so that DM8168 could not connected with it .NOW i want to use single Lane (Lane 1)in X1mode.And i try to modify the two registers about Gen2 Register (PL_GEN2)'s LN_EN to enable X1 mode and Port Link Control Register (PL_LINK_CTRL)'s LNK_MODE,so do i modify the Dm8168 side.BUT it is still not working .what my question is ,could i use the mode of X1with Lane 1? if  it's possable ,where should I  modify to use that mode ? 

thx ahead !

  • 0
    TI__Guru* 95265 points

    For 6678, the PCIe module has a single port (link) with x2 lanes. This enables use of one lane (Lane 0) or two lanes (both Lane 0 and Lane 1, which doubles the throughput).

    With X1, you can't use Lane 1. "but now i find that the Lane 0 of C6678  has some problem" -----> what is the problem? We need to resolve this.

    Regards, Eric

  • 0 in reply to lding
    Intellectual 345 points

    Hi Eric

     thanks for your reply ！

     Our problem is that when we got the PCB board of c6678， we found that the resistance between  Lane 0 and the ground  about 2 Ω，so we want to use Lane 1 with X1 mode!