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AFE7950EVM: RESET FPGA POP UP Latte Tool Error

Shivaprasad H S
Prodigy 50 points
Part Number: AFE7950EVM
Other Parts Discussed in Thread: DAC39RF10EVM, , AFE7950

We want to interface AFE7950EVM to our custom hardware. FMC connector on our board matches the one on KCU105, we use Kintex Ultrascale 40. We use our own JESD204 core, which worked fully with TI DAC39RF10EVM. With Latte tool, setup.py runs. Next one gives errors telling reset FPGA (which we did too), UI pop-up comes up, but nothing more. It seems to expect FPGA generate commands to program something (AFE or LMK. However, LMK is not connected to FMC as per AFE7950EVM schematic). How to proceed

  • +1
    TI__Mastermind 18001 points

    Hi Shivaprasad,

    This error is expected when not using the TI TSW14J58 capture board. This error can be ignored and you can continue with the bring up as usual. Please note that when using the Latte software the programming of the AFE and LMK are done through the USB/FTDI so there is no need for the SPI through FMC. Can you confirm that you are following the steps given in the AFE79xx Bringup Guides to bring up the AFE (This includes running setup and devInit followed by the bringup script? 

    Regards,

    David Chaparro 

  • 0 in reply to David Chaparro
    Prodigy 50 points

    Hi David,

    tried interfacing the AFE7950. But not fully successful. Need help

    1. I am able to get the UI popup after setup and devinit. In UI I am configuring the interface for 24410 [Mode5] as well as 44210 [mode4]. In the first one the lane speed was 9830.4 Mbps and for the 2nd one 4915.2Mbps. I have configured my FPGA GTP for this speed and I am getting cclockout from GTP as expected.

    2. However, receive pattern is not the K28.5 [tried several tens of times with different bit files]. Similarly, SYNC [SYNCBOUTP0 pair] is not responding for the K28.5  [it stays LOW] transmitted out [Tried count of 4 and multiples]. 

    3. Receive GTP out [there are 8 outputs each of 40 bits. Expected K28.5 characters in 10B format, but what comes out is total junk]. As I think, AFE7950 is not getting configured at all. Only clock [LMK] is getting configured [as I am getting all clocks correct, including Sysref].

    Please suggest where/what to look at. 

    [Tried attaching screenshots, but it is not taking it]

    with Regards

    Shivaprasad / Vinayak Bhat