From 693177ec27600f71c70f6089ff19d3f6a2a13755 Mon Sep 17 00:00:00 2001
From: Michael Beaumont <mjboamail@gmail.com>
Date: Sun, 14 Mar 2021 23:28:29 +0100
Subject: [PATCH] Add embedded_hal::digital::v2::* for ExtiPin

---
 embassy-stm32f4/src/exti.rs | 47 +++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)

diff --git a/embassy-stm32f4/src/exti.rs b/embassy-stm32f4/src/exti.rs
index 52cf5a294..d9a68daf7 100644
--- a/embassy-stm32f4/src/exti.rs
+++ b/embassy-stm32f4/src/exti.rs
@@ -10,6 +10,7 @@ use crate::hal::gpio;
 use crate::hal::gpio::{Edge, ExtiPin as HalExtiPin};
 use crate::hal::syscfg::SysCfg;
 use crate::pac::EXTI;
+use embedded_hal::digital::v2 as digital;
 
 use crate::interrupt;
 
@@ -42,6 +43,52 @@ pub struct ExtiPin<T: HalExtiPin + WithInterrupt> {
     _mgr: &'static ExtiManager,
 }
 
+impl<T: HalExtiPin + WithInterrupt + digital::OutputPin> digital::OutputPin for ExtiPin<T> {
+    type Error = T::Error;
+
+    fn set_low(&mut self) -> Result<(), Self::Error> {
+        self.pin.set_low()
+    }
+
+    fn set_high(&mut self) -> Result<(), Self::Error> {
+        self.pin.set_high()
+    }
+}
+
+impl<T: HalExtiPin + WithInterrupt + digital::StatefulOutputPin> digital::StatefulOutputPin
+    for ExtiPin<T>
+{
+    fn is_set_low(&self) -> Result<bool, Self::Error> {
+        self.pin.is_set_low()
+    }
+
+    fn is_set_high(&self) -> Result<bool, Self::Error> {
+        self.pin.is_set_high()
+    }
+}
+
+impl<T: HalExtiPin + WithInterrupt + digital::ToggleableOutputPin> digital::ToggleableOutputPin
+    for ExtiPin<T>
+{
+    type Error = T::Error;
+
+    fn toggle(&mut self) -> Result<(), Self::Error> {
+        self.pin.toggle()
+    }
+}
+
+impl<T: HalExtiPin + WithInterrupt + digital::InputPin> digital::InputPin for ExtiPin<T> {
+    type Error = T::Error;
+
+    fn is_high(&self) -> Result<bool, Self::Error> {
+        self.pin.is_high()
+    }
+
+    fn is_low(&self) -> Result<bool, Self::Error> {
+        self.pin.is_low()
+    }
+}
+
 /*
     Irq	Handler	Description
     EXTI0_IRQn	EXTI0_IRQHandler	Handler for pins connected to line 0