FastLED Platform: Arduino GIGA (STM32H747)

Support for Arduino GIGA R1 based on STM32H747.

Files (quick pass)

• fastled_arm_giga.h: Aggregator; includes fastpin_arm_giga.h, clockless_arm_giga.h.
• fastpin_arm_giga.h: Pin helpers for GIGA.
• led_sysdef_arm_giga.h: System defines (interrupts, PROGMEM policy, F_CPU, cli/sei aliases).
• clockless_arm_giga.h: Clockless WS281x driver for GIGA.
• armpin.h: ARM-style pin template utilities.

Notes:

• Uses ARM irq enable/disable wrappers for timing-critical sections.
• led_sysdef_arm_giga.h sets FASTLED_USE_PROGMEM=0, enables interrupts, and defines F_CPU (e.g., 480MHz) for timing math.

Optional feature defines

• FASTLED_USE_PROGMEM: Default 0.
• FASTLED_ALLOW_INTERRUPTS: Default 1. Enables FASTLED_ACCURATE_CLOCK when 1.
• FASTLED_NO_PINMAP: Indicates pin maps are not stored in PROGMEM.

Define before including FastLED.h.