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A1Keyer 0.1.0 (Cardputer ADV)

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@fritzsche fritzsche released this 14 Jun 01:15
· 61 commits to main since this release
v0.1.0
3f97827

A1Keyer 0.1.0 — first public release (Cardputer ADV)

Low-latency Morse code trainer firmware for the M5Stack Cardputer ADV.

Target: M5Stack Cardputer ADV (ESP32-S3 @ 240 MHz, NS4168 I2S amp,
1.14" 240×135 ST7789V2, 56-key matrix + Button A + GPIO paddle).

Note: This is a 0.x release while the feature set stabilises on real
hardware. v1.0.0 will follow once it has had more time.

The Tab5 (ESP32-P4) target compiles but is not yet considered
release-ready and will follow in a later release.

Features

  • Iambic B keyer — dual-paddle squeeze keying with proper SWAP /
    AUTOREPEAT / END-OF-CHAR logic and 7-dit word-space detection.
  • Straight key — single-contact keying with bounce-guard verification
    and adaptive DIT/DAH classification based on a rolling median.
  • CW decoder — turns paddle activity into text via a lock-free ring
    buffer and a 200-character circular display buffer.
  • Text playback (encoder) — playText("…") renders typed text as CW
    through the same audio path.
  • Sub-3 ms audio latency end-to-end.

Flashing

Flash a1keyer-cardputer-v0.1.0.bin to the Cardputer ADV with esptool.py
or the M5Stack burner:

esptool.py --chip esp32s3 -p /dev/tty.usbserial-* \
    --baud 1500000 write_flash 0x0 a1keyer-cardputer-v0.1.0.bin

Verification

SHA256: 672fc9255cd58ddde670481037e0e8dda7587e27cc03a2fc7f02d0c2fd3711bf
Size:   601,392 bytes (587 KB)

Webflasher

The webflasher should hit GitHub's built-in "latest release" endpoint,
which always resolves to the most recent published release:

GET https://api.github.com/repos/fritzsche/A1Keyer/releases/latest

The response's assets[].browser_download_url is the direct download URL
of the current Cardputer binary. When v0.2.0 ships, the same API call
returns the new binary — no webflasher changes needed.

(The repository also carries a floating latest git tag pointing at the
most recent release commit. That tag is auto-moved on every push of a
vX.Y.Z tag by the
Update latest tag
workflow — so you can also clone or check it out with
git clone --branch latest. Pre-release tags like v0.2.0-rc1 are
intentionally excluded.)

License

MIT — see LICENSE
in the source tree.

Changelog

See CHANGELOG.md
for the full list of changes.

Assets 4
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