Re-export gpio::ExtiPin in prelude, update examples

Author: Disasm

examples/analog-stopwatch-with-spi-ssd1306.rs

@@ -13,7 +13,7 @@ extern crate panic_semihosting;
 extern crate stm32f4xx_hal as hal;
 
 use crate::hal::{
-    gpio::{gpioa::PA0, Edge, ExtiPin, Input, PullDown},
+    gpio::{gpioa::PA0, Edge, Input, PullDown},
     interrupt, pac,
     prelude::*,
     rcc::{Clocks, Rcc},

examples/stopwatch-with-ssd1306-and-interrupts.rs

@@ -22,7 +22,7 @@ extern crate stm32f4xx_hal as hal;
 
 use crate::hal::{
     delay::Delay,
-    gpio::{gpioc::PC13, Edge, ExtiPin, Input, PullUp},
+    gpio::{gpioc::PC13, Edge, Input, PullUp},
     i2c::I2c,
     interrupt,
     prelude::*,

src/prelude.rs

@@ -9,6 +9,7 @@ pub use embedded_hal::prelude::*;
     not(any(feature = "stm32f411", feature = "stm32f412", feature = "stm32f401",))
 ))]
 pub use crate::dac::DacExt as _stm32f4xx_hal_dac_DacExt;
+pub use crate::gpio::ExtiPin as _stm32f4xx_hal_gpio_ExtiPin;
 pub use crate::gpio::GpioExt as _stm32f4xx_hal_gpio_GpioExt;
 pub use crate::i2c::Pins as _stm32f4xx_hal_i2c_Pins;
 pub use crate::rcc::RccExt as _stm32f4xx_hal_rcc_RccExt;