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Altera_Forum's avatar
Altera_Forum
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8 years ago

HPS SPI remapped to FPGA cause system hangup

Hi all!

Up untill now I've successfully used SPI master remapped to FPGA pins with CS pin via PIO. In my u-boot.scr I had such coded: 


fatload mmc 0:2 $fpgadata UniDAS.rbf;
fpga load 0 $fpgadata $filesize
mw $axibridge ${axibridge_handoff};
mw $l3remap ${l3remap_handoff}

Now I'm trying to enable FPGA to HPS SDRAM bridge so I change code to this: 


fatload mmc 0:2 $fpgadata UniDAS.rbf;
fpga load 0 $fpgadata $filesize
run bridge_enable_handoff;

With system console and JTAG-to-AvalonMM I verified that bridge is working fine. But! Now when I try to send data over SPI (via Linux spidev) Linux hangs and reboot. U-Boot and Preloader are both updated to match firmware.

Connections:

https://alteraforum.com/forum/attachment.php?attachmentid=15439&stc=1

Maybe any one has clues what it may be?

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    8 years ago

    I've replaced u-boot.scr code with this: 

    
fatload mmc 0:2 $fpgadata UniDAS.rbf;
fpga load 0 $fpgadata $filesize
mw $axibridge ${axibridge_handoff};
mw $l3remap ${l3remap_handoff}
mw $fpga2sdram ${fpga2sdram_handoff};

    and verify that JTAG master can read system memory and SPI do not hang the system. But I do not know why this is happening.