Module rtc_io

Available on crate feature unstable only.

RTC IO

Overview

The hardware provides a couple of GPIO pins with low power (LP) capabilities and analog functions.

Configuration

These pins can be controlled by either IO MUX or RTC IO.

If controlled by RTC IO, these pins will bypass IO MUX and GPIO matrix for the use by ULP and peripherals in RTC system.

When configured as RTC GPIOs, the pins can still be controlled by ULP or the peripherals in RTC system during chip Deep-sleep, and wake up the chip from Deep-sleep.

Examples

Configure a ULP Pin as Output

// configure GPIO 1 as ULP output pin
let lp_pin = LowPowerOutput::<'static, 1>::new(peripherals.GPIO1);

Structs

LowPowerInput

A GPIO input pin configured for low power operation

LowPowerOutput

A GPIO output pin configured for low power operation

LowPowerOutputOpenDrain

A GPIO open-drain output pin configured for low power operation