fft_led/light_ws2812_AVR/Examples/Chained_writes.c

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2024-02-27 12:12:18 +00:00
/*
* ATTENTION: This example uses the old v1.0 interface.
*
* Light_WS2812 library example - Chained Writes
*
* This example shows how to use multiple calls without issuing a reset
* in between, allowing to send the same buffer to the string
* multiple times. This technique can be useful to conserve memory
* or to calculate LED colors on-the-fly.
*
* Please make sure to set your configuration in "WS2812_config.h" first
*
*/
#include <util/delay.h>
#include <avr/io.h>
#include <avr/interrupt.h>
#include "light_ws2812.h"
struct cRGB led[2];
int main(void)
{
uint8_t pos=0;
uint8_t direction=1;
uint8_t i;
#ifdef __AVR_ATtiny10__
CCP=0xD8; // configuration change protection, write signature
CLKPSR=0; // set cpu clock prescaler =1 (8Mhz) (attiny 4/5/9/10)
#endif
led[0].r=16;led[0].g=00;led[0].b=00; // LED 0 is red
led[1].r=16;led[1].g=16;led[1].b=16; // LED 1 is White
while(1)
{
for (i=0; i<pos; i++)
ws2812_sendarray((uint8_t *)&led[0],3); // Repeatedly send "red" to the led string.
// No more than 1-2<>s should pass between calls
// to avoid issuing a reset condition.
for (i=0; i<(16-pos); i++)
ws2812_sendarray((uint8_t *)&led[1],3); // white
_delay_ms(50); // Issue reset and wait for 50 ms.
pos+=direction;
if ((pos==16)||(pos==0)) direction=-direction;
}
}