173 lines
2.8 KiB
C
173 lines
2.8 KiB
C
#include <inttypes.h>
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include <util/delay.h>
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#include <stdlib.h>
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#include "main.h"
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#include "synth.h"
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#include "usart.h"
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uint16_t sw_v = 0;
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uint16_t darkness = 0;
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uint16_t darkval = 0;
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uint16_t last_darkval = 0;
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static void init_sampletimer(void)
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{
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/*
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* Timer 0
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*/
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/* set timer0 to CTC & prescaler 64 → 125kHz increment */
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TCCR0A = (1 << WGM01);
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TCCR0B = (1 << CS00) | (1 << CS01);
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OCR0A = 6; /* TOP */
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TCNT0 = 0;
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/*enable interrupt*/
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TIMSK0 |= (1<<OCIE0A);
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}
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static inline void init_pwm(void)
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{
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/* set PB2 as output (buzzer pwm port):*/
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DDRB |= (1 << PORTB2);
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/* analog value preselection :*/
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OCR1B = 0x007F;
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/* Top value. Timer overflows here. Thus we have a resulting 8bit pwm */
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ICR1 = 0x00FF;
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/* only b-chan , fastpwm (mode 14), no prescale */
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TCCR1A = (1 << COM1B1) | (1 << WGM11);
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TCCR1B = (1 << WGM13 ) | (1 << WGM12) | (1 << CS10);
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return;
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}
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static void init_leds(void)
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{
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/* enable LED channels as output */
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DDRC |= (1 << PORTC0) | (1 << PORTC2) |
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(1 << PORTC3) | (1 << PORTC1) ;
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/* initially one led is on */
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PORTC = 0b00000101;
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/*
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* Timer 2
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*/
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/* set timer2 to CTC & prescaler 64 → ???125kHz increment */
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TCCR2A = (1 << WGM21);
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TCCR2B = (1 << CS20)|(1 << CS21);
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OCR2A = 255; /* TOP */
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TCNT2 = 0;
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/*enable interrupt*/
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TIMSK2 |= (1<<OCIE2A);
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return;
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}
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inline void setleds(uint8_t state)
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{
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/* set leds according to */
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PORTC |= (state | 0b00001111);
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PORTC &= ~(state | 0b11110000);
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return;
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}
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static void init_motor(void)
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{
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/* vibration motor on B1, initially off: */
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DDRB |= (1 << PORTB1);
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PORTB &= ~( 1<<PORTB1);
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}
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int main(void)
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{
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/* hardware initialisation: */
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init_leds();
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USART0_Init();
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// init_motor();
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init_pwm();
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init_sampletimer();
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/* syntesizer initialisation */
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synth_init();
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/* here the show begins:*/
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sei();
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for(;;) /* ever */ {
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//do something
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if (10 == 1){
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uint16_t out = darkval;
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USART0_put_uint16(out);
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USART0_crlf();
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//last_darkval=darkval;
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};
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//USART0_put_uint16(0xA09F);
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//USART0_crlf();
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};
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/* never */ return 0;
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}
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ISR(TIMER0_COMPA_vect)
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{
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/* calculate next analog sample value in synth mixer:*/
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OCR1B = synth_mix();
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}
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ISR(TIMER2_COMPA_vect)
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{
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darkval++;
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switch(sw_v){
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case 0 : // Set PC0 to 1 and PC1 to 0 - charge LED
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DDRC = 0b00000011;
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PORTC = 0b00000010;
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darkness = 0;
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sw_v++;
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break;
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case 10 : // set PC0 to 0 and PC1 as input
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DDRC = 0b00000001;
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PORTC = 0b00000000;
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sw_v++;
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break;
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case 5000 : sw_v = 0;
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//darkval = darkness;
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//darkval = 1234;
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break;
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default : //measure if PC1 falls to LOW
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if ((darkness==0) && ((PINC && 0b00000010)==0)){
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darkness = sw_v;
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};
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sw_v++;
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}; //end switch
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//PORTC ^= 0b00001111; //toggle C0, C1, C2,C3
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//PORTC = 0;
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}
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