Trying to mirror GPIO 1 to GPIO 40

[zachleedogg]

Using a ESP32-S3-1 WROOM. Custom circuit board.

I designed a pcb to work with a 3.5" TFT display over 8bit parallel interface. I failed to notice that the firmware driver for this display requires many IO to be in range 0-31.

Two of my IO do not meet the requirement.

I wonder if it is possible to map GPIO states over the mux. For example, when setting GPIO1/2, i want GPIO40/41 to follow.

I have tried this but it does not work:

gpio_iomux_out(GPIO_NUM_40, SIG_GPIO_OUT_IDX + 1, false);
gpio_iomux_out(GPIO_NUM_41, SIG_GPIO_OUT_IDX + 2, false);

Any suggestions on how to do this? Is it even possible?