2 Commits

Author SHA1 Message Date
8ad00d8718 Fix LCD1602 blank display: HD44780 timing, pinmap switch, contrast hint.
Match LiquidCrystal_I2C init delays; add Map button for alternate PCF8574 wiring; warn about blue contrast pot.

Co-authored-by: Cursor <cursoragent@cursor.com>
2026-10-23 14:30:21 +08:00
a4c7d54d3e Add LCD1602A I2C test with SoftSPI touch and LVGL.
PCF8574 backpack on SDA=GPIO22/SCL=GPIO27, demo/hello/clear/backlight UI, and flashable firmware/cyd package.

Co-authored-by: Cursor <cursoragent@cursor.com>
2026-10-23 14:25:53 +08:00