Lanbon L10: TCA9554 I2C GPIO, RGB panel, LEDC, HTTP/async; user setup

[thirug010]

Lanbon L10 — Pull request summary

Suggested PR title: Lanbon L10: TCA9554 + GC9503V RGB panel, I2C GPIO/backlight, HTTP/async updates

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Summary

Adds support for the Lanbon L10 (ESP32-S3, GC9503V 480×854 RGB via 3-wire SPI through a TCA9554 expander, FT5x06 touch). Introduces I2C GPIO plumbing for the expander, TCA9554-backed SW SPI for the panel, I2C/LEDC backlight handling, and updates HTTP / async HTTP. Includes a PlatformIO environment in user_setups/esp32s3/lanbon_l10.ini and extends the RGB panel Arduino mod library.

Stats (vs bfc56dfa): commit fa6befd8, 26 files, +1748 / −26 lines.

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Hardware / build

Item	Detail
Board	Lanbon L10 — L10_HS_CB_V1.7, ESP32-S3-WROOM-1U
Display	GC9503V 480×854, RGB, SPI3Wire + TCA9554
Touch	FT5x06 / FT6x36 @ 0x38 (I2C)
Build	[env:lanbon_l10] in user_setups/esp32s3/lanbon_l10.ini — arduino_esp32s3_v2, 16 MB flash, OPI PSRAM, flags such as HASP_LANBON_L10_TCA9554_GC9503V, HASP_USE_EXPANDER, HASP_USE_I2C_GPIO, expander pin defines, HASP_ESP32_DEVICE_I2C_BACKLIGHT, etc.

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Changes by area

1. TCA9554 SW SPI (RGB) — Arduino_TCA9554SWSPI.*, hooks in tft_driver_arduinogfx.cpp and Arduino_PCA9535SWSPI.h.
2. RGB panel mod — lib/Arduino_RPi_DPI_RGBPanel_mod/Arduino_RGB_Display_mod.{cpp,h}.
3. I2C GPIO — i2c_gpio_bus.*, Lanbon-specific i2c_gpio_stc_l10.* (STC-style expander @ 0x20).
4. Devices / backlight — esp32_i2c_ledc.*, esp32.cpp / esp32.h; hasp_gpio.* for I2C-routed pins.
5. Core — hasp.cpp, hasp_gui.*, hasp_dispatch.cpp, hasp_config.h, hasp_debug.*.
6. HTTP — hasp_http.cpp, hasp_http_async.cpp (worth extra review on non-L10 boards).

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Testing checklist

• pio run -e lanbon_l10
• On L10: display, touch, backlight, expander GPIO
• Optional: one non-L10 environment still builds

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Review focus

• HTTP / async paths for regressions on boards without I2C GPIO / expander.
• hasp_gpio.cpp conditional paths and pin routing.
• RGB panel mod vs other GC9503V / RGB setups.