https://forum.elecrow.com/index.php?p=/ Wed, 22 Apr 2026 08:28:25 +0000 en 7 inch — ELECROW - FORUM https://forum.elecrow.com/index.php?p=/discussion/27954/strange-error-when-compiling-lesson-4-drawing-board-7-inch-v3-0 Sun, 23 Nov 2025 22:19:20 +0000 Elecrow HMI Display roycejp 27954@/index.php?p=/discussions Hi
I copied the provided PCA9557 file into the Libraries folder.
Now i get this error (7" v3.0):-
.......\libraries\LovyanGFX\src\lgfx\v1\platforms\esp32s3\Bus_RGB.cpp: In function 'void lgfx::v1::_gpio_pin_sig(uint32_t, uint32_t)':
d:\OneDrive\ESP32\libraries\LovyanGFX\src\lgfx\v1\platforms\esp32s3\Bus_RGB.cpp:98:5: error: 'gpio_hal_iomux_func_sel' was not declared in this scope; did you mean 'gpio_hal_func_sel'?
98 | gpio_hal_iomux_func_sel(GPIO_PIN_MUX_REG[pin], PIN_FUNC_GPIO);
| ^~~~~~~
| gpio_hal_func_sel
exit status 1
Compilation error: exit status 1
Please tell what I need to do.

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