Macros
GPIO drive strength flags
The drive strength flags are a Zephyr specific extension of the standard GPIO flags specified by the Linux GPIO binding. Only applicable for Espressif ESP32 SoCs. The interface supports two different drive strengths: `DFLT` - The lowest drive strength supported by the HW `ALT` - The highest drive strength supported by the HW
#define	ESP32_GPIO_DS_DFLT (0x0U << ESP32_GPIO_DS_POS)
	Default drive strength.

#define	ESP32_GPIO_DS_ALT (0x3U << ESP32_GPIO_DS_POS)
	Alternative drive strength.

GPIO pin input/output enable flags
These flags allow configuring a pin as input or output while keeping untouched its complementary configuration. By instance, if we configure a GPIO pin as an input and pass the flag ESP32_GPIO_PIN_OUT_EN, the driver will not disable the pin's output buffer. This functionality can be useful to render a pin both an input and output, for diagnose or testing purposes.
#define	ESP32_GPIO_PIN_OUT_EN (1 << 12)
	Keep GPIO pin enabled as output.

#define	ESP32_GPIO_PIN_IN_EN (1 << 13)
	Keep GPIO pin enabled as input.

Macro Definition Documentation

◆ ESP32_GPIO_DS_ALT

#define ESP32_GPIO_DS_ALT (0x3U << ESP32_GPIO_DS_POS)

Alternative drive strength.

#define ESP32_GPIO_DS_DFLT (0x0U << ESP32_GPIO_DS_POS)

Default drive strength.

#define ESP32_GPIO_PIN_IN_EN (1 << 13)

Keep GPIO pin enabled as input.

#define ESP32_GPIO_PIN_OUT_EN (1 << 12)

Keep GPIO pin enabled as output.