Yukihiro "Matz" Matsumoto 2b5a389de3 hw-uart: add UART peripheral gems for embedded platforms ...

Add three new gems for UART serial communication:
- hw-uart: common Ruby API, C bindings, ring buffer, and HAL header
- hw-esp32-uart: ESP32 HAL using ESP-IDF UART driver with FreeRTOS
  RX task
- hw-rp2040-uart: RP2040 HAL using Pico SDK with IRQ-driven RX

Co-authored-by: Claude <noreply@anthropic.com>

2026-04-23 19:25:36 +09:00

..

uart.h

hw-uart: add UART peripheral gems for embedded platforms

2026-04-23 19:25:36 +09:00