Implement GPIO input

embassy-stm32-examples/src/bin/blinky.rs

@@ -43,10 +43,10 @@ fn main() -> ! {
     loop {
         info!("high");
         led.set_high().unwrap();
-        cortex_m::asm::delay(1_000_000);
+        cortex_m::asm::delay(10_000_000);
 
         info!("low");
         led.set_low().unwrap();
-        cortex_m::asm::delay(1_000_000);
+        cortex_m::asm::delay(10_000_000);
     }
 }

embassy-stm32-examples/src/bin/button.rs

@@ -0,0 +1,57 @@
+#![no_std]
+#![no_main]
+#![feature(trait_alias)]
+#![feature(min_type_alias_impl_trait)]
+#![feature(impl_trait_in_bindings)]
+#![feature(type_alias_impl_trait)]
+
+#[path = "../example_common.rs"]
+mod example_common;
+use embassy_stm32::gpio::{Input, Level, Output, Pull};
+use embedded_hal::digital::v2::{InputPin, OutputPin};
+use example_common::*;
+
+use cortex_m_rt::entry;
+use stm32f4::stm32f429 as pac;
+
+#[entry]
+fn main() -> ! {
+    info!("Hello World!");
+
+    let pp = pac::Peripherals::take().unwrap();
+
+    pp.DBGMCU.cr.modify(|_, w| {
+        w.dbg_sleep().set_bit();
+        w.dbg_standby().set_bit();
+        w.dbg_stop().set_bit()
+    });
+    pp.RCC.ahb1enr.modify(|_, w| w.dma1en().enabled());
+
+    pp.RCC.ahb1enr.modify(|_, w| {
+        w.gpioaen().enabled();
+        w.gpioben().enabled();
+        w.gpiocen().enabled();
+        w.gpioden().enabled();
+        w.gpioeen().enabled();
+        w.gpiofen().enabled();
+        w
+    });
+
+    let p = embassy_stm32::Peripherals::take().unwrap();
+    let button = Input::new(p.PC13, Pull::Down);
+    let mut led1 = Output::new(p.PB0, Level::High);
+    let _led2 = Output::new(p.PB7, Level::High);
+    let mut led3 = Output::new(p.PB14, Level::High);
+
+    loop {
+        if button.is_high().unwrap() {
+            info!("high");
+            led1.set_high().unwrap();
+            led3.set_low().unwrap();
+        } else {
+            info!("low");
+            led1.set_low().unwrap();
+            led3.set_high().unwrap();
+        }
+    }
+}