RT-Thread / RT-Thread/rt-thread
Using ymodem on the M0 kernel will cause hardfault problems
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proposal
- Dominant language
- C
- Stars
- 12.2k
- Forks
- 5.4k
- Avg merge
- 4d 12h
- Merged PRs (30d)
- 40
Description
Because M0 kernel MCU does not support non aligned access, when receiving data to write to on-chip memory, if using 32-bit pointer to access buffer, it will cause failure.
Solution: when the buffer pointer is passed, copy the data to the aligned buffer and pass it again.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by locating the YMODEM receive path and the code that writes received data to on-chip memory on the M0 kernel. Reproduce the hardfault with a non-aligned buffer, then verify that the receive path uses an aligned buffer before passing data onward and that the fault no longer occurs.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- c
- Domain
- embedded-iot, operating-systems
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100