WS2812B

Example usage:

char outbuffer[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
WS2812OutBuffer( outbuffer, 6 ); //Initialize the output.

ws2812b.h

#ifndef _WS2812_H
	#define _WS2812_H
	#define WSGPIO 5
	#include "c_types.h"
	#include "user_interface.h"
	#include "ets_sys.h"

	void WS2812OutBuffer( uint8_t * buffer, uint16_t length);
#endif

ws2812b.c

#include "ws2812.h"
#include "ets_sys.h"
#include "eagle_soc.h"
#include "osapi.h"
#include "gpio.h"
#include "config.h"
#include "espmissingincludes.h"


void __attribute__((optimize("O2"))) send_ws_0(uint8_t gpio){
	uint8_t i;
	i = 4; while (i--) GPIO_REG_WRITE(GPIO_OUT_W1TS_ADDRESS, 1 << gpio);
	i = 9; while (i--) GPIO_REG_WRITE(GPIO_OUT_W1TC_ADDRESS, 1 << gpio);
}
void __attribute__((optimize("O2"))) send_ws_1(uint8_t gpio){
	uint8_t i;
	i = 8; while (i--) GPIO_REG_WRITE(GPIO_OUT_W1TS_ADDRESS, 1 << gpio);
	i = 6; while (i--) GPIO_REG_WRITE(GPIO_OUT_W1TC_ADDRESS, 1 << gpio);
}


void WS2812OutBuffer( uint8_t * buffer, uint16_t length)
{
	uint16_t i;
	GPIO_OUTPUT_SET(GPIO_ID_PIN(WSGPIO), 0);
	for( i = 0; i < length; i++ )
	{
		system_soft_wdt_feed();

		uint8_t byte = buffer[i];
		if( byte & 0x80 ) send_ws_1(WSGPIO); else send_ws_0(WSGPIO);
		if( byte & 0x40 ) send_ws_1(WSGPIO); else send_ws_0(WSGPIO);
		if( byte & 0x20 ) send_ws_1(WSGPIO); else send_ws_0(WSGPIO);
		if( byte & 0x10 ) send_ws_1(WSGPIO); else send_ws_0(WSGPIO);
		if( byte & 0x08 ) send_ws_1(WSGPIO); else send_ws_0(WSGPIO);
		if( byte & 0x04 ) send_ws_1(WSGPIO); else send_ws_0(WSGPIO);
		if( byte & 0x02 ) send_ws_1(WSGPIO); else send_ws_0(WSGPIO);
		if( byte & 0x01 ) send_ws_1(WSGPIO); else send_ws_0(WSGPIO);
	}
}