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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::{BANK1_REGION, Flash};
use embassy_sync::blocking_mutex::Mutex;
#[entry]
fn main() -> ! {
let p = embassy_stm32::init(Default::default());
// Uncomment this if you are debugging the bootloader with debugger/RTT attached,
// as it prevents a hard fault when accessing flash 'too early' after boot.
/*
for i 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, &flash, &flash);
let active_offset = config.active.offset();
let bl = BootLoader::prepare::<_, _, _, 2048>(config);
unsafe { bl.load(BANK1_REGION.base + active_offset) }
}
#[unsafe(no_mangle)]
#[cfg_attr(target_os = "none", unsafe(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 = unsafe { 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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