54 lines
1.8 KiB
Rust
54 lines
1.8 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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#[cfg(feature = "nightly")]
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pub use embassy_boot::FirmwareUpdater;
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pub use embassy_boot::{AlignedBuffer, BlockingFirmwareUpdater, BootLoaderConfig, FirmwareUpdaterConfig, State};
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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<ACTIVE: NorFlash, DFU: NorFlash, STATE: NorFlash, const BUFFER_SIZE: usize> {
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boot: embassy_boot::BootLoader<ACTIVE, DFU, STATE>,
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aligned_buf: AlignedBuffer<BUFFER_SIZE>,
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}
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impl<ACTIVE: NorFlash, DFU: NorFlash, STATE: NorFlash, const BUFFER_SIZE: usize>
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BootLoader<ACTIVE, DFU, STATE, BUFFER_SIZE>
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{
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/// Create a new bootloader instance using the supplied partitions for active, dfu and state.
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pub fn new(config: BootLoaderConfig<ACTIVE, DFU, STATE>) -> Self {
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Self {
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boot: embassy_boot::BootLoader::new(config),
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aligned_buf: AlignedBuffer([0; BUFFER_SIZE]),
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}
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}
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/// Inspect the bootloader state and perform actions required before booting, such as swapping
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/// firmware.
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pub fn prepare(&mut self) {
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self.boot
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.prepare_boot(self.aligned_buf.as_mut())
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.expect("Boot prepare error");
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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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core::mem::drop(self.boot);
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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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