/* * LED_fading_02.c * with 10bit valuetable and phasecorrect pwm * Controller: ATmega88 @ 8MHz */ #include <avr/io.h> #include <util/delay.h> const unsigned int pwm_table_10[64] = { 0, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 4, 4, 5, 5, 6, 6, 7, 8, 9, 10, 11, 12, 13, 15, 17, 19, 21, 23, 26, 29, 32, 36, 40, 44, 49, 55, 61, 68, 76, 85, 94, 105, 117, 131, 146, 162, 181, 202, 225, 250, 279, 311, 346, 386, 430, 479, 534, 595, 663, 739, 824, 918, 1023 }; int main(void) { DDRB |= (1<<PB1); // OC1A = output ICR1 = 1023; // ICR1 = Top Value // Mode 10: PWM, Phase Correct, Prescaler = 1, Clear OC1A on compare match TCCR1A = (1 << COM1A1) + (1 << WGM11); TCCR1B = (1 << WGM13) + (1 << CS10); while(1) { for(int i=0; i<=63; i++) // PWM inkrementieren { OCR1A = pwm_table_10[i]; // Tabellenwert i dem OCR1A zuweisen _delay_ms(50); } for(int i=63; i>= 1; i--) // PWM dekrementieren { OCR1A = pwm_table_10[i]; // Tabellenwert i dem OCR1A zuweisen _delay_ms(50); } } }