bootloader.rs

#[export_name = "_reset"]
pub unsafe extern "C" fn reset() -> ! {
    asm!("
        cpsie i\n
        movw r0, 0xd800\n
        movt r0, 0x1fff\n
        ldr r0, [r0]\n
        msr MSP, r0" ::: "r0" : "volatile");
    let f = 0x1FFFD804u32 as *const fn();
    (*f)();
    loop {}
}