From b7095b94fad1391e712a0030a47f2e52c2ae5f2b Mon Sep 17 00:00:00 2001
From: Tilman Sauerbeck <tilman@code-monkey.de>
Date: Wed, 18 Dec 2019 09:59:12 +0100
Subject: [PATCH 1/1] application: Configure PTA12 for push button use.

---
 src/application/main.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/application/main.rs b/src/application/main.rs
index 5521427..1fdc577 100644
--- a/src/application/main.rs
+++ b/src/application/main.rs
@@ -30,6 +30,8 @@ extern crate common;
 use common::buffer::Buffer;
 use common::clock;
 use common::systick;
+use common::port;
+use common::gpio;
 use common::usb_serial;
 
 extern {
@@ -42,6 +44,12 @@ extern {
 pub unsafe extern fn main() {
     clock::configure();
     systick::init();
+    port::init();
+
+    // Configure upper right push button.
+    gpio::set_direction(gpio::GPIOA, 1 << 12, gpio::Direction::Input);
+    port::set_af(port::PORTA, 12, 1);
+    port::set_pull(port::PORTA, 12, port::Pull::Up);
 
     enable_interrupts();
 
-- 
2.30.2