83 lines
2.6 KiB
Rust
83 lines
2.6 KiB
Rust
use core::slice::{from_raw_parts, from_raw_parts_mut};
|
|
use embedded_hal::digital::v2::{InputPin, OutputPin};
|
|
|
|
pub trait Gpio where Self: Sized {
|
|
fn into_output(self) -> GpioOutput<Self>;
|
|
fn into_input(self) -> GpioInput<Self>;
|
|
}
|
|
|
|
pub struct GpioInput<PIN>(PIN);
|
|
pub struct GpioOutput<PIN>(PIN);
|
|
|
|
macro_rules! def_gpio {
|
|
($PORT: tt, $PIN: tt, $idx: expr) => (
|
|
impl $PIN {
|
|
fn data(&self) -> &u32 {
|
|
let gpio = tm4c129x::$PORT::ptr();
|
|
let data = unsafe { from_raw_parts(gpio as *const _ as *mut u32, 0x100) };
|
|
&data[(1 << $idx) as usize]
|
|
}
|
|
|
|
fn data_mut(&mut self) -> &mut u32 {
|
|
let gpio = tm4c129x::$PORT::ptr();
|
|
let data = unsafe { from_raw_parts_mut(gpio as *const _ as *mut u32, 0x100) };
|
|
&mut data[(1 << $idx) as usize]
|
|
}
|
|
}
|
|
|
|
impl Gpio for $PIN {
|
|
fn into_output(self) -> GpioOutput<Self> {
|
|
let gpio = unsafe { &*tm4c129x::$PORT::ptr() };
|
|
gpio.dir.modify(|r, w| w.dir().bits(r.dir().bits() | (1 << $idx)));
|
|
gpio.den.modify(|r, w| w.den().bits(r.den().bits() | (1 << $idx)));
|
|
GpioOutput(self)
|
|
}
|
|
fn into_input(self) -> GpioInput<Self> {
|
|
let gpio = unsafe { &*tm4c129x::$PORT::ptr() };
|
|
gpio.dir.modify(|r, w| w.dir().bits(r.dir().bits() & !(1 << $idx)));
|
|
gpio.den.modify(|r, w| w.den().bits(r.den().bits() | (1 << $idx)));
|
|
GpioInput(self)
|
|
}
|
|
}
|
|
|
|
impl InputPin for GpioInput<$PIN> {
|
|
type Error = ();
|
|
fn is_high(&self) -> Result<bool, Self::Error> {
|
|
Ok(*self.0.data() != 0)
|
|
}
|
|
fn is_low(&self) -> Result<bool, Self::Error> {
|
|
Ok(*self.0.data() == 0)
|
|
}
|
|
}
|
|
|
|
impl OutputPin for GpioOutput<$PIN> {
|
|
type Error = ();
|
|
fn set_low(&mut self) -> Result<(), Self::Error> {
|
|
*self.0.data_mut() = 0;
|
|
Ok(())
|
|
}
|
|
fn set_high(&mut self) -> Result<(), Self::Error> {
|
|
*self.0.data_mut() = 0xFF;
|
|
Ok(())
|
|
}
|
|
}
|
|
)
|
|
}
|
|
|
|
pub struct PB4;
|
|
def_gpio!(GPIO_PORTB_AHB, PB4, 4);
|
|
pub struct PB5;
|
|
def_gpio!(GPIO_PORTB_AHB, PB5, 5);
|
|
pub struct PE4;
|
|
def_gpio!(GPIO_PORTE_AHB, PE4, 4);
|
|
pub struct PE5;
|
|
def_gpio!(GPIO_PORTE_AHB, PE5, 5);
|
|
pub struct PK1;
|
|
def_gpio!(GPIO_PORTK, PK1, 1);
|
|
pub struct PP2;
|
|
def_gpio!(GPIO_PORTP, PP2, 2);
|
|
pub struct PP3;
|
|
def_gpio!(GPIO_PORTP, PP3, 3);
|
|
pub struct PQ4;
|
|
def_gpio!(GPIO_PORTQ, PQ4, 4);
|