*/
#![no_std]
-#![crate_type="staticlib"]
+#![no_main]
#[link(name="libcommon.rlib")]
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 jump_to_application(address: u32);
+ 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
+}
+
+#[inline(never)]
+#[panic_handler]
+fn panic(_info: &core::panic::PanicInfo) -> ! {
+ loop {
+ }
+}
+
#[no_mangle]
-pub unsafe extern fn main() {
+pub unsafe extern "C" fn _start() -> ! {
+ 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);
+
+ enable_interrupts();
- if true {
- usb_serial::init(0xf055, 0x635c);
+ if application_missing() || bootloader_requested() {
+ usb_serial::init(0xf055, USB_PID);
let mut b = bootloader::Bootloader::new();
- while b.run() {
+ while b.run() || application_missing() {
}
+
+ usb_serial::shutdown();
}
- jump_to_application(__application_addr);
+ disable_interrupts();
+
+ clock::reset();
+
+ jump_to_application(APPLICATION_ADDR);
}