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[Core] Serial-protocol: always clear receive queue on main half of split keyboard #18419

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merged 1 commit into from
Oct 3, 2022

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KarlK90
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@KarlK90 KarlK90 commented Sep 19, 2022

Description

...in order to flush out any spurious bytes or traffic that belongs to failed transactions send by the secondary half. This is save todo as the main half initiates every transaction and must never receive any data before sending a handshake.

Tested with RP2040 and GD32VF103 splits.

Types of Changes

  • Core
  • Bugfix
  • New feature
  • Enhancement/optimization
  • Keyboard (addition or update)
  • Keymap/layout/userspace (addition or update)
  • Documentation

Issues Fixed or Closed by This PR

Checklist

  • My code follows the code style of this project: C, Python
  • I have read the PR Checklist document and have made the appropriate changes.
  • My change requires a change to the documentation.
  • I have updated the documentation accordingly.
  • I have read the CONTRIBUTING document.
  • I have added tests to cover my changes.
  • I have tested the changes and verified that they work and don't break anything (as well as I can manage).

...in order to flush out any spurious bytes or traffic that belongs to failed
transactions send by the secondary half. This is save todo as the main half
initiates every transaction and must never receive any data before sending a
handshake.
@github-actions github-actions bot added the core label Sep 19, 2022
@KarlK90 KarlK90 changed the title [Core] Serial-protocol: always clear receive queue [Core] Serial-protocol: always clear receive queue on main half of split keyboard Sep 19, 2022
@KarlK90 KarlK90 requested a review from a team September 19, 2022 12:27
@tzarc tzarc requested a review from a team October 3, 2022 05:55
@KarlK90 KarlK90 merged commit 6bbcabe into qmk:develop Oct 3, 2022
@KarlK90 KarlK90 deleted the fix/always-clear-receive-queue branch October 3, 2022 16:23
@mike1808
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mike1808 commented Oct 3, 2022

My serial communication stopped working with this change. KB2040, full duplex

@KarlK90
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KarlK90 commented Oct 3, 2022

Thanks for reporting this, I did try this out on rp2040s half-duplex and gd32vf103 in full-duplex operation. Obviously that was not enough, I'll investigate tomorrow as this is a problem with the PIO driver.

@KarlK90
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KarlK90 commented Oct 3, 2022

@mike1808 I have a theory what could cause the problem. Can you try to remove this line and see if this fixes the issue?
https://github.com/qmk/qmk_firmware/blob/master/platforms/chibios/drivers/vendor/RP/RP2040/serial_vendor.c#L193

@mike1808
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mike1808 commented Oct 3, 2022

@KarlK90 that was it! It fixed it.

ramonimbao pushed a commit to ramonimbao/qmk_firmware that referenced this pull request Nov 28, 2022
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3 participants