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30 lines
1.1 KiB
Plaintext
30 lines
1.1 KiB
Plaintext
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SPI Ethernet
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------------
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(Added: 2024/02)
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As mentioned above, these SPI based Ethernet interfaces require the SPI interface to be configured.
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The SPI bus can be shared, but the SPI Ethernet chips are a bit specific about the used frequency.
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Currently the default SPI frequency of 20 MHz is used, so not all other SPI devices may work together with SPI Ethernet.
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Some boards like the ETH01-EVO (ESP32-C3 based) do not even have the SPI bus pins made accesible.
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.. note:: Switching to ECO mode can sometimes result in an unreachable node when using SPI Ethernet. After a reboot the node works just fine again (in ECO mode). This is currently being investigated.
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GPIO Configuration
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^^^^^^^^^^^^^^^^^^
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* CS pin: Just as any SPI device, it needs a CS pin to tell the device it is being addressed.
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* IRQ/INT pin: Allows the Ethernet chip to signal the ESP about new data. (Optional for W5500)
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* RST pin: ESP will try to reset the Ethernet adapter during boot. Not all boards may have this wired.
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SPI Ethernet ESP32 Boards
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^^^^^^^^^^^^^^^^^^^^^^^^^
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.. include:: ../Reference/SPI_Ethernet_ESP32_boards.rst
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