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#![no_std]
#![no_main]
use core::cell::RefCell;
use cortex_m_rt::{entry, exception};
#[cfg(feature = "defmt")]
use defmt_rtt as _;
use embassy_boot_stm32::*;
use embassy_stm32::flash::{Flash, BANK1_REGION, WRITE_SIZE};
use embassy_stm32::rcc::WPAN_DEFAULT;
use embassy_stm32::usb::Driver;
use embassy_stm32::{bind_interrupts, peripherals, usb};
use embassy_sync::blocking_mutex::Mutex;
use embassy_usb::Builder;
use embassy_usb_dfu::consts::DfuAttributes;
use embassy_usb_dfu::{usb_dfu, Control, ResetImmediate};
bind_interrupts!(struct Irqs {
USB_LP => usb::InterruptHandler<peripherals::USB>;
});
#[entry]
fn main() -> ! {
let mut config = embassy_stm32::Config::default();
config.rcc = WPAN_DEFAULT;
let p = embassy_stm32::init(config);
// Prevent a hard fault when accessing flash 'too early' after boot.
#[cfg(feature = "defmt")]
for _ in 0..10000000 {
cortex_m::asm::nop();
}
let layout = Flash::new_blocking(p.FLASH).into_blocking_regions();
let flash = Mutex::new(RefCell::new(layout.bank1_region));
let config = BootLoaderConfig::from_linkerfile_blocking(&flash);
let active_offset = config.active.offset();
let bl = BootLoader::prepare::<_, _, _, 2048>(config);
if bl.state == State::DfuDetach {
let driver = Driver::new(p.USB, Irqs, p.PA12, p.PA11);
let mut config = embassy_usb::Config::new(0xc0de, 0xcafe);
config.manufacturer = Some("Embassy");
config.product = Some("USB-DFU Bootloader example");
config.serial_number = Some("1235678");
let fw_config = FirmwareUpdaterConfig::from_linkerfile_blocking(&flash);
let mut buffer = AlignedBuffer([0; WRITE_SIZE]);
let updater = BlockingFirmwareUpdater::new(fw_config, &mut buffer.0[..]);
let mut device_descriptor = [0; 256];
let mut config_descriptor = [0; 256];
let mut bos_descriptor = [0; 256];
let mut control_buf = [0; 4096];
let mut state = Control::new(updater, DfuAttributes::CAN_DOWNLOAD);
let mut builder = Builder::new(
driver,
config,
&mut device_descriptor,
&mut config_descriptor,
&mut bos_descriptor,
&mut [],
&mut control_buf,
);
usb_dfu::<_, _, _, ResetImmediate, 4096>(&mut builder, &mut state);
let mut dev = builder.build();
embassy_futures::block_on(dev.run());
}
unsafe { bl.load(BANK1_REGION.base + active_offset) }
}
#[no_mangle]
#[cfg_attr(target_os = "none", link_section = ".HardFault.user")]
unsafe extern "C" fn HardFault() {
cortex_m::peripheral::SCB::sys_reset();
}
#[exception]
unsafe fn DefaultHandler(_: i16) -> ! {
const SCB_ICSR: *const u32 = 0xE000_ED04 as *const u32;
let irqn = core::ptr::read_volatile(SCB_ICSR) as u8 as i16 - 16;
panic!("DefaultHandler #{:?}", irqn);
}
#[panic_handler]
fn panic(_info: &core::panic::PanicInfo) -> ! {
cortex_m::asm::udf();
}
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