atmega-demo/src/main.c

#include <util/delay.h>
#include "iopins.h"
#include "color.h"
#include "wsrgb.h"

#define BUTTON1 D6
#define BUTTON2 D7
#define BUZZER  D10
#define BLINK  D13

void beep(uint8_t tone) {
    for (uint16_t i = 0; i < 50; i++) {
        toggle_pin(BUZZER);
        for(int j = 0; j < tone; j++) {
            _delay_us(10);
        }
        toggle_pin(BUZZER);
        for(int j = 0; j < tone; j++) {
            _delay_us(10);
        }
    }
}

xrgb_t colors[30];

void clear_strip() {
    for (int i = 0; i < 30; i++) {
        colors[i].r = 0;
        colors[i].g = 0;
        colors[i].b = 0;
    }
}


void main()
{
    // Buttons
    as_input_pu(BUTTON1);
    as_input_pu(BUTTON2);

    // Buzzer
    as_output(BUZZER);

    // Neopixels
    ws_init();


    clear_strip();

    hsl_t cursor = {
        .h = 0,
        .s = 255,
        .l = 255,
    };

    int8_t dir = 1;

    int cnt = 0;
    while (1) {
        if (cnt++ == 15) {
            toggle_pin(BLINK);
            cnt = 0;
        }

        if (is_low(BUTTON1)) {
            if (dir != 1) {
                dir = 1;
                beep(80);
                clear_strip();
            }
        } else if (is_low(BUTTON2)) {
            if (dir != 8) {
                dir = 8;
                beep(50);
                clear_strip();
            }
        }

        cursor.h = (uint8_t) ((int8_t)cursor.h +  dir);

        // shift all
        for (int i = 29; i >= 1; i--) {
            colors[i] = colors[i - 1];
        }

        // set first
        colors[0] = hsl_xrgb(cursor);


        // show
        for (int i = 0; i < 30; i++) {
            ws_send_xrgb(colors[i]);
        }
        ws_show();

        _delay_ms(25);

    }
}