62 lines
1.1 KiB
ReStructuredText
62 lines
1.1 KiB
ReStructuredText
.. _gowin:
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Gowin notes
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###########
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GOWIN GW1N
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==========
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.. NOTE::
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* Trenz TEC0117
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* Sipeed Tang Nano
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* Sipeed Tang Nano 4K
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* Honeycomb
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* RUNBER
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``.fs`` file is the default format generated by *Gowin IDE*, so nothing special must be done to generates this file.
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Since the same file is used for SRAM and Flash a CLI argument is used to specify the destination.
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Flash SRAM
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----------
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with ``-m``:
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.. code-block:: bash
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openFPGALoader -m -b BOARD_NAME impl/pnr/*.fs
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where ``BOARD_NAME`` is:
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* ``tec0117``
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* ``tangnano``
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* ``tangnano4k``
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* ``tangnano9k``
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* ``runber``
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Flash
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-----
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.. ATTENTION::
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Only with Trenz TEC0117 and runber.
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with ``-f``, file load:
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.. code-block:: bash
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openFPGALoader -f -b BOARD_NAME impl/pnr/*.fs
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where ``BOARD_NAME`` is:
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* ``tec0117``
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* ``runber``
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It's possible to flash external SPI Flash (connected to MSPI) in bscan mode by using ``--external-flash`` instead of
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``-f``.
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.. NOTE::
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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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