Mongoose OS driver for the WS2812B (aka NeoPixel) RGB LED strip.

This driver enables control of the WS2812B (aka NeoPixel) RGB LED strip on Mongoose OS.

1. Copy the ws2812b directory into the firmware's src directory and add it to the sources section of mos.yml
2. Include the header "ws2812b/ws2812b.h" in the appropriate places.

The ws2812b struct represents an instance of an LED strip and once initialized is used for controlling the LEDs.

struct ws2812b strip = {
	// GPIO pin for the LED strip
	.pin = 0,
	// Total number of LEDs
	.count = 8,
	// Colour order of the LED: RGB, GRB, or BGR
	.order = WS2812B_ORDER_GRB
};

ws2812b_init(&strip);

// Set each LED colour to 0 red, 0 green, 0 blue (off)
ws2812b_clear(&strip);

// Show the updated colours
ws2812b_show(&strip);

// LED number to set
uint16_t led = 0;

// RGB colour value
uint8_t r = 0xFF;
uint8_t g = 0xFF;
uint8_t b = 0xFF;

ws2812b_set_led(&strip, led, r, g, b);

// Refresh the LEDs
ws2812b_show(&strip);

Once finished with the device, allocated memory for the data member of the ws2812b struct must be freed accordingly.

ws2812b_free(&strip);