79 lines
3.8 KiB
ReStructuredText
79 lines
3.8 KiB
ReStructuredText
.. _troubleshooting:
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Troubleshooting
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###############
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I installed openFPGALoader but it says `command not found` when I try to launch it
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==================================================================================
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The correct spelling of the program is *openFPGALoader* with FPGA and the "L" of "Loader" in uppercase.
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Ensure the spelling of the program is correct.
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Gowin device could not communicate since last bitstream flashed. (issue `#206 <https://github.com/trabucayre/openFPGALoader/issues/206>`_)
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==========================================================================================================================================
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Gowin's FPGA may fails to be detected if **JTAGSEL_N** (pin 08 for *GW1N-4K*) is used as a GPIO.
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To recover you have to pull down this pin (before power up) to recover JTAG interface (*UG292 - JTAGSELL_N section*).
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JTAG init failed
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================
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Avoid using USB hubs and connect it directly to your PC USB port.
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Tang Primer 20k program slow and stucked (issue `#250 <https://github.com/trabucayre/openFPGALoader/issues/250>`_)
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==================================================================================================================
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Check your openFPGALoader version:
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.. code:: bash
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openFPGALoader -V
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If it is older than release then v0.9.0, install the most recent version (from commit `f5b89bff68a5e2147404a895c075773884077438 <https://github.com/trabucayre/openFPGALoader/commit/fe259fb78d185b3113661d04cd7efa9ae0232425>`_ or later).
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Cannot flash Tang Nano 20k (issue `#251 <https://github.com/trabucayre/openFPGALoader/issues/511>`_)
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====================================================================================================
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Some firmware version cannot be flashed on Linux-based systems. Version 2024122312 is such an example. It seems this version was not published on the `SiPeed website <https://api.dl.sipeed.com/TANG/Debugger/onboard/BL616/>`_, however some boards sold have this firmware.
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The cause of the problem is the debugger on the Tang Nano, specifically the firmware of this debugger. This firmware can be easily updated by following `these <https://wiki.sipeed.com/hardware/en/tang/common-doc/update_debugger.html>`_ steps.
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Cannot flash Tang Nano 9k (issue `#251 <https://github.com/trabucayre/openFPGALoader/issues/251>`_)
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===================================================================================================
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This is a device issue, erase its Embedded Flash using Official GoWin Programmer (preferentially in Windows) and SRAM too, then you can use openFPGALoader again.
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Unable to open FTDI device: -4 (usb_open() failed) (issue `#245 <https://github.com/trabucayre/openFPGALoader/issues/245>`_)
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============================================================================================================================
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Edit your `/etc/udev/rules.d/99-ftdi.rules` file exchanging your programming device permissions.
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For more information, check the udev section from `this guide <install.rst>`_
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Converter cannot be opened: `fails to open device` (issue `#626 <https://github.com/trabucayre/openFPGALoader/issues/626>`_)
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============================================================================================================================
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This is usually a permissions issue on Linux.
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Check your current groups:
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.. code:: bash
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id $USER
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Verify device node access rights:
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.. code:: bash
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ls -l /dev/ttyUSB* /dev/ttyACM*
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Then verify udev rules are installed correctly (``70-openfpgaloader.rules`` or
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``99-openfpgaloader.rules``), and that your user is in the expected group
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(``dialout`` or ``plugdev``).
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After changing groups or rules, reload udev rules, then unplug/replug the
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converter and log out/login again.
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Reference: `install guide (udev rules section) <https://trabucayre.github.io/openFPGALoader/guide/install.html#udev-rules>`_.
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