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Merge pull request #679 from gzalo/add-usb-blaster-passive-serial

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Add Passive Serial mode for USB Blaster (Altera/Intel)
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Gwenhael Goavec-Merou
2026-07-12 14:07:03 +02:00
committed by GitHub
parent d52abf7059 aab38dd51e
commit 36c57a6535
5 changed files with 195 additions and 4 deletions
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doc/vendors/intel.rst
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@@ -199,6 +199,19 @@ default behavior and user must explictly change this by using
* ``--flash-sector UFM1,CFM2`` to erase and update ``UFM1``, ``UFM0``
and ``CFM2`` (equivalent to ``--flash-sector UFM1,UFM0,CFM2``)
USB-Blaster passive serial mode
-------------------------------
USB-Blaster I cables can load a raw RBF directly through the passive
serial pins:
.. code-block:: bash
openFPGALoader -c usb-blaster --passive-serial project_name.rbf
The pin mapping is TCK to DCLK, TDO to CONF_DONE, TMS to nCONFIG, and TDI to
DATA0. RBF bytes are transmitted LSB first.
Intel/Altera (Old Boards)
=========================