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feat(lcd): add configurable timeout for lcd i2c panel

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Closes https://github.com/espressif/esp-idf/issues/18542
Closes https://github.com/espressif/esp-idf/pull/18543
This commit is contained in:
Chen Chen
2026-05-12 15:01:03 +08:00
parent a766a22659
commit 08ca9fcab3
8 changed files with 15 additions and 4 deletions
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docs/en/api-reference/peripherals/lcd/i2c_lcd.rst
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@@ -23,6 +23,7 @@ I2C Interfaced LCD
- :cpp:member:`esp_lcd_panel_io_i2c_config_t::dev_addr` sets the I2C device address of the LCD controller chip. The LCD driver uses this address to communicate with the LCD controller chip.
- :cpp:member:`esp_lcd_panel_io_i2c_config_t::scl_speed_hz` sets the I2C clock frequency in Hz. The value should not exceed the range recommended in the LCD spec.
- :cpp:member:`esp_lcd_panel_io_i2c_config_t::lcd_cmd_bits` and :cpp:member:`esp_lcd_panel_io_i2c_config_t::lcd_param_bits` set the bit width of the command and parameter 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_i2c_config_t::transaction_timeout_ms` sets the timeout (in milliseconds) for each underlying I2C transfer. Setting this to 0 or -1 means to wait indefinitely. If a positive value is specified, panel IO calls will return ``ESP_ERR_TIMEOUT`` when the timeout is reached. This is useful for cases like shared buses or when a slave device could potentially hang the bus.
.. code-block:: c