From 8483f69a801c3424943842ea2b3ccd7a7a2be3af Mon Sep 17 00:00:00 2001
From: Tilman Sauerbeck <tilman@code-monkey.de>
Date: Sun, 7 Jul 2019 20:29:05 +0200
Subject: [PATCH] bootloader: configure PTE24 for push button use.

---
 src/bootloader/main.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/bootloader/main.rs b/src/bootloader/main.rs
index 0f863fc..2e43b67 100644
--- a/src/bootloader/main.rs
+++ b/src/bootloader/main.rs
@@ -32,6 +32,8 @@ mod bootloader;
 
 use common::clock;
 use common::systick;
+use common::port;
+use common::gpio;
 use common::usb_serial;
 
 extern {
@@ -45,6 +47,11 @@ pub unsafe extern fn main() {
     clock::configure();
     systick::init();
 
+    // Configure lower left push button.
+    gpio::set_direction(gpio::GPIOE, 1 << 24, gpio::Direction::Input);
+    port::set_af(port::PORTE, 24, 1);
+    port::set_pull(port::PORTE, 24, port::Pull::Up);
+
     if true {
         usb_serial::init(0xf055, 0x635c);
 
-- 
2.30.2