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.
26 #[link(name="libcommon.rlib")]
39 use common::usb_serial;
41 type Reg32 = register::Register<u32>;
44 fn enable_interrupts();
45 fn disable_interrupts();
47 fn jump_to_application(address: u32) -> !;
50 #[cfg(bootloader_type = "intermediate")]
51 const APPLICATION_ADDR: u32 = 0x0;
53 #[cfg(bootloader_type = "final")]
54 const APPLICATION_ADDR: u32 = 0x8000;
56 #[cfg(bootloader_type = "intermediate")]
57 const USB_PID: u16 = 0x635b;
59 #[cfg(bootloader_type = "final")]
60 const USB_PID: u16 = 0x635c;
62 unsafe fn application_missing() -> bool {
63 let first_app_word = Reg32::new(APPLICATION_ADDR);
65 first_app_word.read() == 0xffffffff
68 #[cfg(bootloader_type = "intermediate")]
69 fn bootloader_requested() -> bool {
73 #[cfg(bootloader_type = "final")]
74 fn bootloader_requested() -> bool {
75 let start_ticks = systick::now();
77 while !systick::has_timeout_ms(start_ticks, 3000) {
78 if (gpio::get(gpio::GPIOE) & (1 << 31)) == 0 {
88 fn panic(_info: &core::panic::PanicInfo) -> ! {
94 pub unsafe extern "C" fn _start() -> ! {
100 // Configure middle left push button.
101 gpio::set_direction(gpio::GPIOE, 1 << 31, gpio::Direction::Input);
102 port::set_af(port::PORTE, 31, 1);
103 port::set_pull(port::PORTE, 31, port::Pull::Up);
107 if application_missing() || bootloader_requested() {
108 usb_serial::init(0xf055, USB_PID);
110 let mut b = bootloader::Bootloader::new();
112 while b.run() || application_missing() {
115 usb_serial::shutdown();
118 disable_interrupts();
122 jump_to_application(APPLICATION_ADDR);