X-Git-Url: http://git.code-monkey.de/?a=blobdiff_plain;f=src%2Fbootloader%2Fmain.rs;h=a5fe9832d30a7cf6d18ed9ca3e130e5477818163;hb=b7095b94fad1391e712a0030a47f2e52c2ae5f2b;hp=fbd3aa0c01c03d6bbe34352e97b5349920f1a6ad;hpb=7204b4504475d3b1d26e26ad4b608127946d34fd;p=gps-watch.git

diff --git a/src/bootloader/main.rs b/src/bootloader/main.rs
index fbd3aa0..a5fe983 100644
--- a/src/bootloader/main.rs
+++ b/src/bootloader/main.rs
@@ -27,17 +27,90 @@
 
 extern crate common;
 
+mod flash;
+mod bootloader;
+
+use common::register;
 use common::clock;
+use common::systick;
+use common::port;
+use common::gpio;
+use common::watchdog;
 use common::usb_serial;
 
+type Reg32 = register::Register<u32>;
+
+extern {
+    fn enable_interrupts();
+    fn disable_interrupts();
+
+    fn jump_to_application(address: u32);
+}
+
+#[cfg(bootloader_type = "intermediate")]
+const APPLICATION_ADDR: u32 = 0x0;
+
+#[cfg(bootloader_type = "final")]
+const APPLICATION_ADDR: u32 = 0x8000;
+
+#[cfg(bootloader_type = "intermediate")]
+const USB_PID: u16 = 0x635b;
+
+#[cfg(bootloader_type = "final")]
+const USB_PID: u16 = 0x635c;
+
+unsafe fn application_missing() -> bool {
+    let first_app_word = Reg32::new(APPLICATION_ADDR);
+
+    first_app_word.read() == 0xffffffff
+}
+
+#[cfg(bootloader_type = "intermediate")]
+fn bootloader_requested() -> bool {
+    true
+}
+
+#[cfg(bootloader_type = "final")]
+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() {
+    watchdog::disable();
     clock::configure();
+    systick::init();
+    port::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();
+    enable_interrupts();
 
-        loop {
+    if application_missing() || bootloader_requested() {
+        usb_serial::init(0xf055, USB_PID);
+
+        let mut b = bootloader::Bootloader::new();
+
+        while b.run() || application_missing() {
         }
+
+        usb_serial::shutdown();
     }
+
+    disable_interrupts();
+
+    clock::reset();
+
+    jump_to_application(APPLICATION_ADDR);
 }