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AFE7900EVM: Chip version issue with Latte script

Patrice LEROY
Prodigy 10 points
Part Number: AFE7900EVM
Other Parts Discussed in Thread: AFE7900, AFE7950

Hi,

I try to initiate AFE7900EVM with TSW14J57.

I use AFE79xxEVM_TSW14J57_BringupGuides package and AFE7900+TSW14J57.pptx. When I try to run script S1_OnboardClk_RX250M_TX_FB_500M.py with Latte as defined in slide 7, I get message: "Mismatch between entered (0x20) and evice Read Chip version (0x12 or 0x13). Please select correct chip version. Do you want to continue?". And so I get 1 error and 1 warning

This value is defined in setup.py at line 13: "chipVersion=0x20    #change to 0x20 for AFE7900EVM".

What is wrong?

Thanks for your support.

Regards,

Patrice

  • 0
    Prodigy 10 points

    Hi,

    I change chipVersion to 0x12 and 0x13 in setup_ini.py script. When I run S1_OnboardClk_RX250M_TX_FB_500M.py, I get 4 errors and 1st one is "chip version currently selected does not support x NCO lower than 600 MHz"

    Thanks for your support

  • 0 in reply to Patrice LEROY
    TI__Genius 10865 points

    Hi Patrice,

    Can you keep the chipVersion in setup.py to 0x13 and update '[500,500]' lines 24 and 35 of S1_OnboardClk_RX_250M_TX_FB_500M.py to '[700,700]' and check?

    On a few AFE7900EVMs, AFE7950 parts were assembled by mistake. Once we make sure this is the issue, we can discuss how to resolve this. 

    Regards,

    Vijay

  • 0 in reply to Vijayendra Varma Siddamsetty
    Prodigy 10 points

    Hi Vijay,

    You are right. Your fix solves current issue and allow me to go deeper in AFE79xxEVM_TSW14J57_BringupGuides package / AFE7900+TSW14J57.pptx.

    And so for Tx is OK ie I am able to measure RF signal at all Tx output (A to D). But I am now stopped at Rx part. I only succeed to get a spectrum with a fondamental at 59.07 MHz with -68 dBFs level.

    On screenshot, the printed ADC Output Data rate is 245.76 and not 245.76M. So I wonder if there is another trick ?

    regards,

    Patrice

  • 0 in reply to Patrice LEROY
    Prodigy 10 points

    Hi Vijay,

    After a full reboot (EVM + PC), everything is operating as expected.

    Consider issue as solved.

    Thanks for your support.

    regards.

    Patrice