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55 lines
2.1 KiB
Plaintext
55 lines
2.1 KiB
Plaintext
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# Copyright (c) 2023 Gunar Schorcht
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#
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# This file is subject to the terms and conditions of the GNU Lesser
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# General Public License v2.1. See the file LICENSE in the top level
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# directory for more details.
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#
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menuconfig MODULE_ESP_LCD
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bool "Enable LCD low-level parallel interface driver"
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depends on MODULE_LCD
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default y if HAVE_LCD_PARALLEL_LL_MCU
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help
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Enabe the MCU-driven low-level MCU 8080 8-/16-bit parallel interface
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driver.
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if MODULE_ESP_LCD
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config MODULE_ESP_LCD_GPIO
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bool "GPIO-driven low-level parallel interface driver"
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depends on !CPU_FAM_ESP32 && !CPU_FAM_ESP32S2 && !CPU_FAM_ESP32S3
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default y
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help
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The ESP32x SoC variant used does not have a peripheral for the parallel
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low-level interface. However, it can be emulated with special low-level
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GPIO operations. It is faster than the GPIO-driven 8-/16-bit parallel
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interface implemented in the LCD driver, but requires 4 kByte RAM for
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8-bit data bus width and 8 kByte RAM for 16-bit data bus width.
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config LCD_WRITE_CLOCK_MHZ
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int "LCD write clock rate in MHz"
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range 1 80
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depends on CPU_FAM_ESP32 || CPU_FAM_ESP32S2 || CPU_FAM_ESP32S3
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default 10 if CPU_FAM_ESP32
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default 40 if CPU_FAM_ESP32S2
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default 20 if CPU_FAM_ESP32S3
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help
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Defines the clock rate that is used for the LCD write signal. It
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depends on used ESP32x SoC variant and used display interface.
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config LCD_DATA_BUF_SIZE
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int "LCD data buffer size in byte"
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depends on CPU_FAM_ESP32 || CPU_FAM_ESP32S2 || CPU_FAM_ESP32S3
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default 512
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help
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Defines the size of the buffers used to write data to the LCD
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screen. Since double buffering is used, there are two buffers
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of this size. One buffer is used first by the LCD driver to
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write the data that needs to be transferred to the LCD, and
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one buffer from which the DMA then transfers the data to the
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LCD peripherals. This allows data to be written before the
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DMA transfer is complete. The larger the buffers, the better
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the performance, but the higher the memory requirements.
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endif
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