FastLED Platform: SAM (Arduino Due)

Atmel/Microchip SAM3X (Arduino Due) support.

Files (quick pass)

• fastled_arm_sam.h: Aggregator; includes pin/SPI and clockless.
• fastpin_arm_sam.h: Pin helpers.
• fastspi_arm_sam.h: SPI backend.
• clockless_arm_sam.h: Clockless driver.
• clockless_block_arm_sam.h: Block/multi-lane clockless driver.
• led_sysdefs_arm_sam.h: System defines for SAM.

Notes:

• Older Cortex-M3; ensure interrupt windows are respected to avoid jitter.
• FASTLED_USE_PROGMEM=0 recommended; long-running ISRs may require reducing strip length or frame rate.

Optional feature defines

• FASTLED_USE_PROGMEM: Default 0.
• FASTLED_ALLOW_INTERRUPTS: Default 1. Enables FASTLED_ACCURATE_CLOCK for correct timing calculations.
• Block/multi‑lane clockless driver is available via clockless_block_arm_sam.h; no user macro toggle required here.

Place defines before including FastLED.h.