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