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use 4/5/6 as new firmware for better understanding
This commit is contained in:
ZhangYong 2024-03-24 18:25:04 +08:00
parent 1171e11655
commit 9bc00e68fa
1 changed files with 12 additions and 12 deletions
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24
embassy-boot/src/boot_loader.rs
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@ -183,29 +183,29 @@ impl<ACTIVE: NorFlash, DFU: NorFlash, STATE: NorFlash> BootLoader<ACTIVE, DFU, S
/// | Partition | Swap Index | Page 0 | Page 1 | Page 3 | Page 4 |
/// |-----------|------------|--------|--------|--------|--------|
/// | Active | 0 | 1 | 2 | 3 | - |
/// | DFU | 0 | 3 | 2 | 1 | X |
/// | DFU | 0 | 4 | 5 | 6 | X |
///
/// The algorithm starts by copying 'backwards', and after the first step, the layout is
/// as follows:
///
/// | Partition | Swap Index | Page 0 | Page 1 | Page 3 | Page 4 |
/// |-----------|------------|--------|--------|--------|--------|
/// | Active | 1 | 1 | 2 | 1 | - |
/// | DFU | 1 | 3 | 2 | 1 | 3 |
/// | Active | 1 | 1 | 2 | 6 | - |
/// | DFU | 1 | 4 | 5 | 6 | 3 |
///
/// The next iteration performs the same steps
///
/// | Partition | Swap Index | Page 0 | Page 1 | Page 3 | Page 4 |
/// |-----------|------------|--------|--------|--------|--------|
/// | Active | 2 | 1 | 2 | 1 | - |
/// | DFU | 2 | 3 | 2 | 2 | 3 |
/// | Active | 2 | 1 | 5 | 6 | - |
/// | DFU | 2 | 4 | 5 | 2 | 3 |
///
/// And again until we're done
///
/// | Partition | Swap Index | Page 0 | Page 1 | Page 3 | Page 4 |
/// |-----------|------------|--------|--------|--------|--------|
/// | Active | 3 | 3 | 2 | 1 | - |
/// | DFU | 3 | 3 | 1 | 2 | 3 |
/// | Active | 3 | 4 | 5 | 6 | - |
/// | DFU | 3 | 4 | 1 | 2 | 3 |
///
/// ## REVERTING
///
@ -220,19 +220,19 @@ impl<ACTIVE: NorFlash, DFU: NorFlash, STATE: NorFlash> BootLoader<ACTIVE, DFU, S
///
/// | Partition | Revert Index | Page 0 | Page 1 | Page 3 | Page 4 |
/// |-----------|--------------|--------|--------|--------|--------|
/// | Active | 3 | 1 | 2 | 1 | - |
/// | DFU | 3 | 3 | 1 | 2 | 3 |
/// | Active | 3 | 1 | 5 | 6 | - |
/// | DFU | 3 | 4 | 1 | 2 | 3 |
///
///
/// | Partition | Revert Index | Page 0 | Page 1 | Page 3 | Page 4 |
/// |-----------|--------------|--------|--------|--------|--------|
/// | Active | 3 | 1 | 2 | 1 | - |
/// | DFU | 3 | 3 | 2 | 2 | 3 |
/// | Active | 3 | 1 | 2 | 6 | - |
/// | DFU | 3 | 4 | 5 | 2 | 3 |
///
/// | Partition | Revert Index | Page 0 | Page 1 | Page 3 | Page 4 |
/// |-----------|--------------|--------|--------|--------|--------|
/// | Active | 3 | 1 | 2 | 3 | - |
/// | DFU | 3 | 3 | 2 | 1 | 3 |
/// | DFU | 3 | 4 | 5 | 6 | 3 |
///
pub fn prepare_boot(&mut self, aligned_buf: &mut [u8]) -> Result<State, BootError> {
// Ensure we have enough progress pages to store copy progress