fl::third_party::ezWS2812 Class Reference

Detailed Description

ezWS2812 SPI driver for WS2812 LEDs

This driver uses the SPI peripheral to generate WS2812 timing signals. Each WS2812 bit is encoded as 8 SPI bits to achieve the required timing.

Hardware Requirements:

• Consumes one SPI peripheral
• Requires SPI clock of 3.2MHz for proper WS2812 timing
• SPI MOSI pin must be connected to LED data line

Usage:

ezWS2812 leds(60);  // 60 LEDs
leds.begin();
leds.set_all(255, 0, 0);  // All red
leds.end_transfer();

Definition at line 56 of file ezWS2812.h.

#include <ezWS2812.h>

Public Member Functions
	ezWS2812 (uint16_t num_leds, SPIClass &spi=SPI)
	Constructor.
void	begin ()
	Initialize SPI communication.
void	end ()
	End SPI communication.
void	end_transfer ()
	Complete LED data transfer Sends reset signal to latch data into LEDs.
void	set_all (uint8_t red, uint8_t green, uint8_t blue)
	Set all LEDs to the same color.
void	set_brightness (uint8_t brightness)
	Set brightness (0-100%)
void	set_pixel (uint8_t red, uint8_t green, uint8_t blue, uint16_t count=1)
	Set color for specific number of LEDs.

Private Member Functions
void	color_to_spi (uint8_t color, uint8_t *buffer) const
	Convert color byte to SPI bit pattern.
uint8_t	one () const
	Convert color bit to SPI signal for '1' bit.
uint8_t	zero () const
	Convert color bit to SPI signal for '0' bit.

Private Attributes
uint8_t	brightness_
uint16_t	num_leds_
SPIClass *	spi_

Static Private Attributes
static constexpr uint8_t	kResetByte = 0x00
static constexpr uint8_t	kResetBytes = 32
static constexpr uint16_t	kResetTimeUs = 80
static constexpr uint32_t	kSpiClockHz = 6400000

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The documentation for this class was generated from the following file:

• third_party/ezws2812/ezWS2812.h