ca. 15-20 WS2812B mit Atmega8 steuern

/*

 * Light_WS2812 library example - RGB_blinky

 *

 * cycles one LED through red, green, blue

 *

 * This example is configured for a ATtiny85 with PLL clock fuse set and 

 * the WS2812 string connected to PB4. 

 */ 

#define F_CPU 16000000

#include <util/delay.h>

#include <avr/io.h>

#include <avr/interrupt.h>

#include "light_ws2812.h"

struct CRGB { uint8_t g; uint8_t r; uint8_t b; };

struct CRGB led[2]; //NEU NEU NEU

int main(void)

{

        uint8_t mask;

        #ifdef __AVR_ATtiny10__

                CCP=0xD8;                // configuration change protection, write signature

                CLKPSR=1;                // set cpu clock prescaler =1 (8Mhz) (attiny 4/5/9/10)

                mask=_BV(PB2);

        #else

                CLKPR=_BV(CLKPCE);

                CLKPR=0;                        // set clock prescaler to 1 (attiny 25/45/85/24/44/84/13/13A)                

                mask=_BV(PB0);

        #endif

                DDRB|=mask;

        while(1)

    {

                led[0].r=255;led[0].g=00;led[0].b=0;                // Write red to array

                ws2812_sendarray((uint8_t *)&led[0],3);                // Send array to WS2812 LED. The output pin is low after send.

                led[1].r=0;led[0].g=255;led[0].b=0;                // green LED1 NEU NEU NEU

                ws2812_sendarray((uint8_t *)&led[1],3);    // NEU NEU NEU

                _delay_ms(500);                                                                // Issue reset and wait for 500ms.

                led[0].r=0;led[0].g=255;led[0].b=0;                        // green

                ws2812_sendarray((uint8_t *)&led[0],3);

                _delay_ms(500);

                led[0].r=0;led[0].g=00;led[0].b=255;                // blue

                ws2812_sendarray((uint8_t *)&led[0],3);

                _delay_ms(500);        

    }

}

led[0].r=0;led[0].g=00;led[0].b=255;                // blue

led[1].r=0;led[1].g=00;led[1].b=255;                // blue

ws2812_sendarray((uint8_t *)&led[0],3*2);

// Kann man reduzieren, auf die Resetdauer, stweht irgendwo im Datenblatt 

//ich glaube 50 oder sowas. Kann man aber auch weglassen, wenn dazwischen 

// genug Code ist, das die Zeit auf jeden fall reicht.

// Wichtig ist nur, das der Pegel auf dem Ausgang in dieser Zeit auf 0 ist.

_delay_ms(500);