forked from PAWPAW-Mirror/lib_xua
37 lines
1.0 KiB
ReStructuredText
37 lines
1.0 KiB
ReStructuredText
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PDM Microphones
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===============
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The codebase supports input from up to 8 PDM microphones.
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PDM microphone support is provided via ``lib_mic_array``. Settings for PDM microphones are controlled
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via the defines in :ref:`opt_pdm_defines`.
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.. _opt_pdm_defines:
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.. list-table:: PDM defines
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:header-rows: 1
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:widths: 20 80 20
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* - Define
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- Description
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- Default
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* - ``XUA_NUM_PDM_MICS``
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- The number of mics to enable (0 for disabled)
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- ``0`` (disabled)
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* - ``PDM_MIC_INDEX``
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- Defines which input channel the mics map to
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- ``0``
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The codebase expects 1-bit ports to be defined in the application XN file for ``PORT_PDM_CLK`` and ``PORT_PDM_MCLK``.
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An 8-bit port is expected for ``PORT_PDM_DATA``. For example::
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<Tile Number="0" Reference="tile[0]">
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<!-- Mic related ports -->
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<Port Location="XS1_PORT_1E" Name="PORT_PDM_CLK"/>
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<Port Location="XS1_PORT_8B" Name="PORT_PDM_DATA"/>
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<Port Location="XS1_PORT_1F" Name="PORT_PDM_MCLK"/>
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</Tile>
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