Koryuu firmware version 1.1

Version 1.1

Notes:

• Official release version.
• Will be shipped on new Koryuu units.

Changes:

• Made "-ntp" firmware variants disable free-run mode statically.

Version 1.1-RC3

Notes:

• Third release candidate.
• Intended as the firmware the second Koryuu batch ships with.

Fixes:

• Fully setup encoder on change of free-run status.
  • One user reported that -RC2 sometimes failed to wake up from sleep if an input was activated after a period of having no active input.

Version 1.1-RC2

Notes:

• Second release candidate.
• Intended as the firmware the second Koryuu batch ships with.

Fixes:

• Attempt to make the "-ntp" firmware more robust.
  • There was a bug report for 1.1-test1 and 1.1-RC1 where the test pattern was shown when nothing is connected to the CVBS/S-Video inputs. Have been unable to reproduce, but trying to see if consolidating control of the output settings for both the decoder and the encoder will resolve this by eliminating potential corner cases.

Version 1.1-RC1

Notes:

• First release candidate.
• Intended as the firmware the second Koryuu batch ships with.

Fixes:

• Do not automatically overwrite existing settings on EEPROM on startup if they are from a newer firmware version.
  • The user can still explicitly trigger the current settings to be written by pressing the OPT and INPUT CHANGE buttons simultaneously.

Version 1.1-test1

Notes:

• A public test version. May have bugs.
• Continuing to ask for community feedback, especially regarding the following issues:
  • NTSC interlaced mode field reversal issue (does it still occur?),
  • Any problems with flickering color or color picture turning into monochrome,
  • Sync loss issues on bright flashes on screen.

Fixes:

• Reduced the maximum stack frame size (must not waste RAM)
• Properly track changes to input video standard, re-initialize the encoder chip more thoroughly on change.
• Use 700mV output level both for both luma and chroma output, regardless of input video standard.
• Improve handling of settings
  • Better validation
  • Improved forward compatibility
  • Settings are now marked dirty when loading existing settings with a different version, so that the settings are rewritten to EEPROM at the first opportunity.

Not yet fixed:

• The smoothing continues to be ugly. :(

Other changes/improvements:

• The version of the firmware is now embedded in the firmware image.
• Some build fixes, partly courtesy of clang's stricter interpretation of certain aspects of the C++14 standard than avr-g++.

New features:

• None. Hoping to stabilize for next official firmware version.

Version 1.1-test0

Notes:

• A public test version. May have bugs.
• Asking for community feedback, especially regarding the NTSC interlaced mode field reversal issue some users were experiencing.

Fixes:

• Improved power-up sequence for the video chips.
• Made transitions between interlaced and progressive modes more robust. The OSSC getting confused by Koryuu's output should no longer happen, as long as the OSSC firmware version is up-to-date (tested with OSSC firmware version 0.86).
• Hopefully fixed field reversal in NTSC interlaced mode.
  • Feedback from those suffering from this problem with the release firmware is more than welcome.

Not yet fixed:

• The smoothing is still ugly, thus not very usable. :(

General improvements:

• Code cleanups and refactoring with no user-visible functional change.

New features:

• Separate firmware image (with the "_ntp" suffix), which disables video output when no input is detected.
• Settings can now be saved and are automatically restored on power-up.
  • Uses the on-chip EEPROM.
  • Checksummed and versioned to allow firmware updates without losing current settings.
  • Saved settings:
    • Default input (Composite/S-Video)
    • Default input pedestal setting (on/off, corresponding to NTSC-M/J)
    • Smoothing (on/off)
    • Disable output when no input is detected (on/off)
      • Off by default (test pattern shown when no input).
      • Currently, changing this setting is not exposed, except by the separate firmware image.
  • To save current settings, press the INPUT_CHANGE and OPT buttons simultaneously.
    • This is a bit timing-sensitive, which has been mitigated by requiring the buttons to be pressed a bit longer than before, but this requires careful balancing, as making the buttons any "laggier" may make the buttons feel unresponsive in other contexts. Any feedback regarding the "feel" of the buttons is welcome.
    • After hitting the button combo successfully, LEDs flash a few times.
    • On failure to hit the button combo, the input/pedestal setting and/or the smoothing setting changes, as if one or both of the buttons had been hit separately.

Koryuu firmware test version 1.1-test1

Version 1.1-test1

Notes:

• A public test version. May have bugs.
• Continuing to ask for community feedback, especially regarding the
  following issues:
  • NTSC interlaced mode field reversal issue (does it still occur?),
  • Any problems with flickering color or color picture turning into monochrome,
  • Sync loss issues on bright flashes on screen.

Fixes:

• Reduced the maximum stack frame size (must not waste RAM)
• Properly track changes to input video standard, re-initialize the encoder chip more thoroughly on change.
• Use 700mV output level both for both luma and chroma output, regardless of input video standard.
• Improve handling of settings
  • Better validation
  • Improved forward compatibility
  • Settings are now marked dirty when loading existing settings with a different version, so that the settings are rewritten to EEPROM at the first opportunity.

Not yet fixed:

• The smoothing continues to be ugly. :(

Other changes/improvements:

• The version of the firmware is now embedded in the firmware image.
• Some build fixes, partly courtesy of clang's stricter interpretation of certain aspects of the C++14 standard than avr-g++.

New features:

• None. Hoping to stabilize for next official firmware version.

Koryuu firmware test version 1.1-test0

Version 1.1-test0

Notes:

• A public test version. May have bugs.
• Asking for community feedback, especially regarding the NTSC interlaced mode field reversal issue some users were experiencing.

Fixes:

• Improved power-up sequence for the video chips.
• Made transitions between interlaced and progressive modes more robust. The OSSC getting confused by Koryuu's output should no longer happen, as long as the OSSC firmware version is up-to-date (tested with OSSC firmware version 0.86).
• Hopefully fixed field reversal in NTSC interlaced mode.
  • Feedback from those suffering from this problem with the release firmware is more than welcome.

Not yet fixed:

• The smoothing is still ugly, thus not very usable. :(

General improvements:

• Code cleanups and refactoring with no user-visible functional change.

New features:

• Separate firmware image (with the "_ntp" suffix), which disables video output when no input is detected.
• Settings can now be saved and are automatically restored on power-up.
  • Uses the on-chip EEPROM.
  • Checksummed and versioned to allow firmware updates without losing current settings.
  • Saved settings:
    • Default input (Composite/S-Video)
    • Default input pedestal setting (on/off, corresponding to NTSC-M/J)
    • Smoothing (on/off)
    • Disable output when no input is detected (on/off)
      • Off by default (test pattern shown when no input).
      • Currently, changing this setting is not exposed, except by the separate firmware image.
  • To save current settings, press the INPUT_CHANGE and OPT buttons simultaneously.
    • This is a bit timing-sensitive, which has been mitigated by requiring the buttons to be pressed a bit longer than before, but this requires careful balancing, as making the buttons any "laggier" may make the buttons feel unresponsive in other contexts. Any feedback regarding the "feel" of the buttons is welcome.
    • After hitting the button combo successfully, LEDs flash a few times.
    • On failure to hit the button combo, the input/pedestal setting and/or the smoothing setting changes, as if one or both of the buttons had been hit separately.

Koryuu release firmware

Version 1.0

This is the first official firmware version. All units manufactured to date have this version installed.