Module tm4c123x_hal::gpio

General Purpose Input / Output

This module makes heavy use of types to try and ensure you can't have a pin in a mode you didn't expect.

Most pins start in the Tristate state. You can call methods to convert them to inputs, outputs or put them into Alternate Function mode (e.g. to use with a UART).

Some of the modes require extra information, and for that we use the so- called 'Turbo Fishsyntax, which looks likemethod::`.

If the operation is non-atomic, then you need to pass a mut-reference to the port's control structure. This ensures you can't change two pins in two threads at the same time. If the operation is fully atomic (using the chip's bit-banding feature) then this argument is not required.

Here's an example:

let p = Peripherals::take().unwrap();
let mut sc = p.SYSCTL.constrain();
let mut portb = p.GPIO_PORTB.split(&sc.power_control);
let timer_output_pin = portb.pb0.into_af_push_pull::<gpio::AF7>(&mut portb.control);
let uart_tx_pin = portb.pb1.into_af_open_drain::<gpio::AF1, gpio::PullUp>(&mut portb.control);
let blue_led = portb.pb2.into_push_pull_output();
let button = portb.pb3.into_pull_up_input();

Modules

gpioa	GPIO
gpiob	GPIO
gpioc	GPIO
gpiod	GPIO
gpioe	GPIO
gpiof	GPIO

Structs

AF1	Alternate function 1 (type state)
AF2	Alternate function 2 (type state)
AF3	Alternate function 3 (type state)
AF4	Alternate function 4 (type state)
AF5	Alternate function 5 (type state)
AF6	Alternate function 6 (type state)
AF7	Alternate function 7 (type state)
AF8	Alternate function 8 (type state)
AF9	Alternate function 9 (type state)
AF14	Alternate function 14 (type state)
AlternateFunction	AlternateFunction mode (type state for a GPIO pin)
Floating	Sub-mode of Input: Floating input (type state)
Input	Input mode (type state)
Locked	Pin is locked through the GPIOCR register
OpenDrain	Sub-mode of Output/AlternateFunction: Open drain output (type state for Output)
Output	Output mode (type state)
PullDown	Sub-mode of Input: Pulled down input (type state)
PullUp	Sub-mode of Input: Pulled up input (type state)
PushPull	Sub-mode of Output/AlternateFunction: Push pull output (type state for Output)
Tristate	Tri-state

Enums

InterruptMode

Sets when a GPIO pin triggers an interrupt.

Traits

AlternateFunctionChoice	All the different Alternate Functions you can choose implement this
GpioExt	Extension trait to split a GPIO peripheral in independent pins and registers
InputMode	All input modes implement this
IsUnlocked	All unlocked pin modes implement this
OpenDrainMode	OpenDrain modes implement this
OutputMode	All output modes implement this