Help¶

When shifted out at the configured clock frequency, this must generate a pulse whose width fits within the chipset specifications for T0H, and whose interpulse timing meets low times. It is recommended that the first and last bits in the frame be zero; this “encourages” SPI IPs to leave MOSI low between frames.

Direct dependencies¶

WS2812_STRIP && LED_STRIP

(Includes any dependencies from ifs and menus.)

Defaults¶

0x60 if SOC_SERIES_STM32F4X
0x40 if SOC_FAMILY_NRF

Kconfig definition¶

At drivers/led_strip/Kconfig.ws2812:43

Included via Kconfig:8 → Kconfig.zephyr:40 → drivers/Kconfig:68 → drivers/led_strip/Kconfig:32

Menu path: (Top) → Device Drivers → LED strip drivers → Enable WS2812 (and compatible) LED strip driver

config WS2812_STRIP_ZERO_FRAME
    hex "SPI frame to shift out to signal a zero bit"
    default 0x60 if SOC_SERIES_STM32F4X
    default 0x40 if SOC_FAMILY_NRF
    depends on WS2812_STRIP && LED_STRIP
    help
      When shifted out at the configured clock frequency,
      this must generate a pulse whose width fits within the chipset
      specifications for T0H, and whose interpulse timing meets low
      times. It is recommended that the first and last bits in the
      frame be zero; this "encourages" SPI IPs to leave MOSI low
      between frames.

(The ‘depends on’ condition includes propagated dependencies from ifs and menus.)