2 * Copyright (c) 2019 Tilman Sauerbeck (tilman at code-monkey de)
4 * Permission is hereby granted, free of charge, to any person obtaining
5 * a copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sublicense, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
19 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
20 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
21 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 #![crate_type="staticlib"]
26 #[link(name="libcommon.rlib")]
38 use common::usb_serial;
40 type Reg32 = register::Register<u32>;
43 fn enable_interrupts();
44 fn disable_interrupts();
46 fn jump_to_application(address: u32);
49 #[cfg(bootloader_type = "intermediate")]
50 const APPLICATION_ADDR: u32 = 0x0;
52 #[cfg(bootloader_type = "final")]
53 const APPLICATION_ADDR: u32 = 0x8000;
55 #[cfg(bootloader_type = "intermediate")]
56 const USB_PID: u16 = 0x635b;
58 #[cfg(bootloader_type = "final")]
59 const USB_PID: u16 = 0x635c;
61 unsafe fn application_missing() -> bool {
62 let first_app_word = Reg32::new(APPLICATION_ADDR);
64 first_app_word.read() == 0xffffffff
67 fn bootloader_requested() -> bool {
68 let start_ticks = systick::now();
70 while !systick::has_timeout_ms(start_ticks, 3000) {
71 if (gpio::get(gpio::GPIOE) & (1 << 24)) == 0 {
80 pub unsafe extern fn main() {
85 // Configure lower left push button.
86 gpio::set_direction(gpio::GPIOE, 1 << 24, gpio::Direction::Input);
87 port::set_af(port::PORTE, 24, 1);
88 port::set_pull(port::PORTE, 24, port::Pull::Up);
92 if application_missing() || bootloader_requested() {
93 usb_serial::init(0xf055, USB_PID);
95 let mut b = bootloader::Bootloader::new();
97 while b.run() || application_missing() {
100 usb_serial::shutdown();
103 disable_interrupts();
105 jump_to_application(APPLICATION_ADDR);