X-Git-Url: http://git.code-monkey.de/?a=blobdiff_plain;f=src%2Fbootloader%2Fmain.rs;h=d81da1532baa5b0b41f3a05f5f1adc7e1cf3d084;hb=819a110096caba3d31533649fc9e007bd93af302;hp=0f863fc4af6338c033edb1df7f847c7465196ce1;hpb=dbda961b1cc62d8bbc155bd53d74a1fb52fed654;p=gps-watch.git

diff --git a/src/bootloader/main.rs b/src/bootloader/main.rs
index 0f863fc..d81da15 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 {
@@ -40,12 +42,29 @@ extern {
 
 const APPLICATION_ADDR: u32 = 0x0;
 
+fn bootloader_requested() -> bool {
+    let start_ticks = systick::now();
+
+    while !systick::has_timeout_ms(start_ticks, 3000) {
+        if (gpio::get(gpio::GPIOE) & (1 << 24)) == 0 {
+            return true;
+        }
+    }
+
+    false
+}
+
 #[no_mangle]
 pub unsafe extern fn main() {
     clock::configure();
     systick::init();
 
-    if true {
+    // 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 bootloader_requested() {
         usb_serial::init(0xf055, 0x635c);
 
         let mut b = bootloader::Bootloader::new();
@@ -54,5 +73,5 @@ pub unsafe extern fn main() {
         }
     }
 
-    jump_to_application(__application_addr);
+    jump_to_application(APPLICATION_ADDR);
 }