Repository navigation
host/dfu: don't sleep bwPollTimeout after the first DNBUSY - #69
Merged
Merged
Conversation
The STM32 ROM bootloaders perform the erase/program inside the GETSTATUS that follows a DNLOAD, so sleeping the reported poll timeout first only adds latency: on an STM32F4 every 2 KB write chunk took 104 ms, of which ~33 ms was the programming. Poll again at once and sleep only if the device is still busy. Measured on an F4 (lynxpdu) and an H7 (pmd): the image write drops from 12.7 s to 4.4 s and from 3.4 s to 1.3 s. Co-Authored-By: Claude <noreply@anthropic.com>
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
The STM32 ROM bootloaders perform the erase/program inside the GETSTATUS that follows a DNLOAD, so sleeping the reported poll timeout first only adds latency: on an STM32F4 every 2 KB write chunk took 104 ms, of which ~33 ms was the programming. Poll again at once and sleep only if the device is still busy. Measured on an F4 (lynxpdu) and an H7 (pmd): the image write drops from 12.7 s to 4.4 s and from 3.4 s to 1.3 s.