led-strip/main.c

//#pragma GCC push_options
//#pragma GCC optimize ("O0")
#define F_CPU 8000000UL
#include <util/delay.h>
#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/power.h>

#define PATTERN_COUNT 4
#define attiny45

typedef struct
{
	unsigned char r;
	unsigned char g;
	unsigned char b;
	int time_hold;
}rgbval;

volatile uint16_t ms;
volatile uint16_t counts;

void InitTimer0(void);
void InitTimer1(void);
void setrgb(unsigned int r,unsigned int g, unsigned int b);
void InitInterrupts(void);

void count(void)
{
	//counts=0;//0..65535 
	counts++;
	if(counts>3)	//1m	//1ms
	{
			counts=0;
			if(ms<60000)//1 minute
			{
					ms++;
			}
			else
			{
					ms=0;
			}
	}
}
ISR(TIMER0_OVF_vect)
{
		count();
}
int main (void)
{
rgbval pattern[6][PATTERN_COUNT]={	{{0,0,0,100},		{0,0,0,100},	{0,0,0,100},		{0,0,0,100}},
										{{1,1,1,10},		{1,1,153,20}, 	{200,50,39,10}, 	{204,255,153,20}},
										{{1,50,50,10},		{10,255,0,10},	{80,200,0,20},		{200,200,1,20}},
										{{1,1,5,10},		{1,1,255,10},	{1,1,5,10},			{1,1,255,10}},
										{{252,102,3,10},	{161,67,47,10},	{118,120,74,10},	{83,120,74,20}},
										{{87,119,122,10}, 	{95,87,122,10},	{52, 69, 56,10},	{83, 84, 72,10}}};
int i=0,i2=0,i3=0;
int r,g,b = 0;
int set=0;
int input=0;
uint16_t pre_delay=0;
ms =0;
counts = 0;	 
//disable prescaler	
//	CLKPR = (1<<CLKPR); maybe optimization removes this
//	CLKPR = 0x00;
clock_prescale_set(clock_div_1);//replaces above 2 lines
//#######OC0A auf ausgang
DDRB = (1 << PB0 )|(1<<PB1)|(1<<PB4);//data directions - output
PORTB |= (1<<PB2);					//pullups
cli();								//DISABLE Global Interrupts
InitTimer0();
InitTimer1();
InitInterrupts();
sei();								//ENABLE Global Interrupts
	while(1)
	{
				for(i=0;i<PATTERN_COUNT;i++)
				{
						r = pattern[i2][i].r;
						g = pattern[i2][i].g;
						b = pattern[i2][i].b;
						if(i==(PATTERN_COUNT-1)) {i= 0;}
						while(1)
						{
							input=PINB;
							if(((input & (1<<PB2)) == 0 && set==0))
							{
									set=1;
										i=0;
										i2++;
										if(i2==6)
										{
												i2=0;
										}
				//Visual feedback "mode change"
										for(i3=0;i3<i2;i3++)
										{
												setrgb(0,0,0);			
												pre_delay = ms;		
												while((ms-pre_delay) < 200);
												setrgb(0,200,0);
												pre_delay = ms;		
												while((ms-pre_delay) < 200){};
										}
							}
							else if(((input & (1<<PB2)) != 0))
							{
									set=0;
							}
				//iterate throught pattern to the next ones
							if(r < pattern[i2][i+1].r) {r++;}
							if(r > pattern[i2][i+1].r) {r--;}	
							if(g < pattern[i2][i+1].g) {g++;}
							if(g > pattern[i2][i+1].g) {g--;}	
							if(b < pattern[i2][i+1].b) {b++;}
							if(b > pattern[i2][i+1].b) {b--;}	
							setrgb(r,g,b);		
				//read timer evaluate time since read in 1ms steps
							//pre_delay = ms;		
							//while((ms-pre_delay) <1000);
							_delay_ms(30);
							if(r == pattern[i2][i+1].r && g == pattern[i2][i+1].g && b == pattern[i2][i+1].b) break;
						}
				}
	} 
return 0;                 
}
void InitTimer0(void)
{
//#######Timer0-setup#####			|Phase correct pwm
	TCCR0A = (2<<COM0A0)|(2<<COM0B0)|(1<<WGM00)|(1<<WGM01);	//mode fast pwm (1/Fcpu)*prescaler*(max+1) = 
			//prescaler /64 gives 0...255 0.002048s = 2.0ms 1mhz-> /8 
	TCCR0B = (1<<CS01);//|(1<<CS01)/256;
}	
void InitTimer1(void)
{
//######Timer1-setup
	PLLCSR &= ~(1<<PCKE);
	TCCR1 = (1<<COM1A0)|(1<<COM1A1)|(1<<CS12)|(1<<CS10)|(1<<CS11);//(1<<CS10)|(1<<CS12);//|(1<<CS13);	//frequencyi //inverting PWM because 0 dtc not possible
	GTCCR = (1<<PWM1B)|(1<<COM1B1);	//mode + overrun clear, Set on compare match
	OCR1C = 255; // clear timer at 255	
}
void setrgb(unsigned int r,unsigned int g,unsigned int b)
{
		//depends on timer0
		OCR0A = g;//green
		OCR0B = r;//red
		//depends on Timer1
		OCR1B = b;//blue
}
void InitInterrupts(void)
{
		TIMSK |= (1<<TOIE0);//interrupt on overflow = one timer cycle
		TIFR |= (1<<TOV0);
		TCNT0 = 0;
}
//#pragma GCC pop_options