52 lines
1.8 KiB
Rust
52 lines
1.8 KiB
Rust
#![no_std]
|
|
#![warn(missing_docs)]
|
|
#![doc = include_str!("../README.md")]
|
|
mod fmt;
|
|
|
|
pub use embassy_boot::{
|
|
AlignedBuffer, BlockingFirmwareState, BlockingFirmwareUpdater, BootError, BootLoaderConfig, FirmwareState,
|
|
FirmwareUpdater, FirmwareUpdaterConfig, State,
|
|
};
|
|
use embedded_storage::nor_flash::NorFlash;
|
|
|
|
/// A bootloader for STM32 devices.
|
|
pub struct BootLoader {
|
|
/// The reported state of the bootloader after preparing for boot
|
|
pub state: State,
|
|
}
|
|
|
|
impl BootLoader {
|
|
/// Inspect the bootloader state and perform actions required before booting, such as swapping firmware
|
|
pub fn prepare<ACTIVE: NorFlash, DFU: NorFlash, STATE: NorFlash, const BUFFER_SIZE: usize>(
|
|
config: BootLoaderConfig<ACTIVE, DFU, STATE>,
|
|
) -> Self {
|
|
Self::try_prepare::<ACTIVE, DFU, STATE, BUFFER_SIZE>(config).expect("Boot prepare error")
|
|
}
|
|
|
|
/// Inspect the bootloader state and perform actions required before booting, such as swapping firmware
|
|
pub fn try_prepare<ACTIVE: NorFlash, DFU: NorFlash, STATE: NorFlash, const BUFFER_SIZE: usize>(
|
|
config: BootLoaderConfig<ACTIVE, DFU, STATE>,
|
|
) -> Result<Self, BootError> {
|
|
let mut aligned_buf = AlignedBuffer([0; BUFFER_SIZE]);
|
|
let mut boot = embassy_boot::BootLoader::new(config);
|
|
let state = boot.prepare_boot(aligned_buf.as_mut())?;
|
|
Ok(Self { state })
|
|
}
|
|
|
|
/// Boots the application.
|
|
///
|
|
/// # Safety
|
|
///
|
|
/// This modifies the stack pointer and reset vector and will run code placed in the active partition.
|
|
pub unsafe fn load(self, start: u32) -> ! {
|
|
trace!("Loading app at 0x{:x}", start);
|
|
#[allow(unused_mut)]
|
|
let mut p = cortex_m::Peripherals::steal();
|
|
#[cfg(not(armv6m))]
|
|
p.SCB.invalidate_icache();
|
|
p.SCB.vtor.write(start);
|
|
|
|
cortex_m::asm::bootload(start as *const u32)
|
|
}
|
|
}
|