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spi_master: add dummy check when both mosi and miso are set

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Closes https://github.com/espressif/esp-idf/issues/2715
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Armando
2020-06-30 14:26:43 +08:00
parent 9d1c5df7ab
commit fc6010c959
2 changed files with 16 additions and 12 deletions
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3
docs/en/api-reference/peripherals/spi_master.rst
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@@ -520,8 +520,7 @@ Known Issues
This can prohibit you from transmitting and receiving data longer than 64 bytes.
3. Try using the command and address fields to replace the write phase.
2. Full-duplex transactions are not compatible with the *dummy bit workaround*, hence the frequency is limited. See :ref:`dummy
bit speed-up workaround <dummy_bit_workaround>`.
2. Full-duplex transactions are not compatible with the *dummy bit workaround*, hence the frequency is limited. See :ref:`dummy bit speed-up workaround <dummy_bit_workaround>`.
3. ``dummy_bits`` in :cpp:type:`spi_device_interface_config_t` and :cpp:type:`spi_transaction_ext_t` are not available when SPI read and write phases are both enabled (regardless of full duplex or half duplex mode).