• State TI Thinks Resolved
  • Locked Locked
  • Replies 2 replies
  • Answers 1 answer
  • Subscribers 102 subscribers
  • Views 949 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Why EMAC module does not work with L2 Memory

Nguyen Quoc Viet
Prodigy 150 points

I am working with C6472 DSP and I am using EMAC module to transfer data with other PC and I configured EMAC module in Gigabit mode.

As I read in datasheet and EMAC user guide, we can configure packet buffer descriptor to L2 memory in stead of EMAC local mem.

So I defined a area in L2 Memory from 00800000

then I changed ecfg.EMACCoreConfig.DescBase =EMAC_DESC_BASE_L2 (I am using CSL lib)


but EMAC module does not work.

with same source code, I just change ecfg.EMACCoreConfig.DescBase =EMAC_DESC_BASE_CPPI. The EMAC module work correctly.

it seems that, I am missing to configure something. 

anyone can help me this issue?

Thanks

  • 0
    TI__Guru* 81335 points
    I hope you are using SYS/BIOS. Please ensure to allocate memory for EMAC descriptor in bios configuration file(.cfg) before assigning address. Also refer the .map generated for address map. Thank you.
  • 0
    TI__Guru** 116100 points
    Are you using "CSL_EMAC_DSC_BASE_ADDR_L2" corresponding base address ?

    if (localDev.Config.DescBase == EMAC_DESC_BASE_CPPI) {
    pDesc = (EMAC_Desc *)CSL_EMAC_DSC_BASE_ADDR;
    }else if (localDev.Config.DescBase == EMAC_DESC_BASE_L2) {
    pDesc = (EMAC_Desc *)CSL_EMAC_DSC_BASE_ADDR_L2;
    }else if (localDev.Config.DescBase == EMAC_DESC_BASE_DDR){
    pDesc = (EMAC_Desc *)CSL_EMAC_DSC_BASE_ADDR_DDR;
    }else {
    return (CPSW3G_INVALID_PARAM);
    }

    Please refer to similar post.
    e2e.ti.com/.../148073