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feat(spi_lcd): add spi cs timing parameters

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Some lcd hardware drivers need different CS setup time. Add pretrans
and posttrans parameters to control the CS time.

Closes https://github.com/espressif/esp-idf/issues/13071
This commit is contained in:
Chen Jichang
2024-07-01 19:23:28 +08:00
parent 9bae186123
commit 8d0990806c
4 changed files with 10 additions and 0 deletions
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docs/en/api-reference/peripherals/lcd/spi_lcd.rst
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@@ -25,6 +25,8 @@ SPI Interfaced LCD
- :cpp:member:`esp_lcd_panel_io_spi_config_t::spi_mode` sets the SPI mode. The LCD driver uses this mode to communicate with the LCD. For the meaning of the SPI mode, please refer to the :doc:`SPI Master API doc </api-reference/peripherals/spi_master>`.
- :cpp:member:`esp_lcd_panel_io_spi_config_t::lcd_cmd_bits` and :cpp:member:`esp_lcd_panel_io_spi_config_t::lcd_param_bits` set the bit width of the command and parameter that recognized by the LCD controller chip. This is chip specific, you should refer to your LCD spec in advance.
- :cpp:member:`esp_lcd_panel_io_spi_config_t::trans_queue_depth` sets the depth of the SPI transaction queue. A bigger value means more transactions can be queued up, but it also consumes more memory.
- :cpp:member:`esp_lcd_panel_io_spi_config_t::cs_ena_pretrans` sets the amount of SPI bit-cycles which the cs should be activated before the transmission (0-16).
- :cpp:member:`esp_lcd_panel_io_spi_config_t::cs_ena_posttrans` sets the amount of SPI bit-cycles which the cs should stay active after the transmission (0-16).
.. code-block:: c