/*
 * light weight WS2812 lib include
 *
 * Version 2.3  - Nev 29th 2015
 * Author: Tim (cpldcpu@gmail.com) 
 *
 * Please do not change this file! All configuration is handled in "ws2812_config.h"
 *
 * License: GNU GPL v2 (see License.txt)
 +
 */ 

#ifndef LIGHT_WS2812_H_
	#define LIGHT_WS2812_H_

	#include <avr/io.h>
	#include <avr/interrupt.h>
	#include "ws2812_config.h"

	/*
	 *  Structure of the LED array
	 *
	 * cRGB:     RGB  for WS2812S/B/C/D, SK6812, SK6812Mini, SK6812WWA, APA104, APA106
	 * cRGBW:    RGBW for SK6812RGBW
	 */

	struct cRGB  { uint8_t g; uint8_t r; uint8_t b; };
	struct cRGBW { uint8_t g; uint8_t r; uint8_t b; uint8_t w;};



	/* User Interface
	 * 
	 * Input:
	 *         ledarray:           An array of GRB data describing the LED colors
	 *         number_of_leds:     The number of LEDs to write
	 *         pinmask (optional): Bitmask describing the output bin. e.g. _BV(PB0)
	 *
	 * The functions will perform the following actions:
	 *         - Set the data-out pin as output
	 *         - Send out the LED data 
	 *         - Wait 50µs to reset the LEDs
	 */

	void ws2812_setleds     (struct cRGB  *ledarray, uint16_t number_of_leds);
	void ws2812_setleds_pin (struct cRGB  *ledarray, uint16_t number_of_leds,uint8_t pinmask);
	void ws2812_setleds_rgbw(struct cRGBW *ledarray, uint16_t number_of_leds);

	/* 
	 * Old interface / Internal functions
	 *
	 * The functions take a byte-array and send to the data output as WS2812 bitstream.
	 * The length is the number of bytes to send - three per LED.
	 */

	void ws2812_sendarray     (uint8_t *array,uint16_t length);
	void ws2812_sendarray_mask(uint8_t *array,uint16_t length, uint8_t pinmask);


	/*
	 * Internal defines
	 */

	#define CONCAT(a, b)            a ## b
	#define CONCAT_EXP(a, b)   CONCAT(a, b)

	#define ws2812_PORTREG  CONCAT_EXP(PORT,ws2812_port)
	#define ws2812_DDRREG   CONCAT_EXP(DDR,ws2812_port)

#endif /* LIGHT_WS2812_H_ */
