matrix4x5.ino

/* Created:   Fri Dec 2 16
 * Processor: ATmega328P
 * Compiler:  Arduino AVR
 */
#define DEBUG                           // Definizione che permette il debug
                                        // Se commentato, nessun debug
#include <TimerOne.h>                   // usato per le temporizzazioni

#define INBTN 2                          // segnale di ingresso
#define TMPRESS 10                      // piedino del suono
#define TIMEOUT 7200000UL               // fine tempo contatore
#define NUMCOLS 4                       // numero di colonne
#define NUMROWS 5                       // numero di righe
#define MAX_LEDS NUMCOLS * NUMROWS      // numero di led
#define BLINKTIME 10

uint8_t data[NUMCOLS];
uint8_t led_count = 0;
uint8_t ticks = 0;
uint32_t period = 0;                        // periodo da contare per 2 ore
uint8_t led_blink = 1;
bool push_btn;

void countdown () {
    period = millis();
            #ifdef DEBUG
            Serial.println("Inizio il conteggio");
            #endif
    while (period < (millis()-TIMEOUT)) {};
    clrmem();
    led_count = 0;
}

void refresh() {
    if (ticks < NUMCOLS-1) ticks++;
    else ticks = 0;
    PORTC = 0;
    PORTB = data[ticks];
    bitWrite(PORTC, ticks, 1);
    delay(23);
}

void clrmem() {
    for (uint8_t x=0; x < NUMCOLS; x++) data[x] = 0;
}

void btn_press() {
    uint8_t col;
    if (pulseIn(INBTN,LOW) > TMPRESS && (led_blink == 1)) {
#ifdef DEBUG
        Serial.print("led_count = ");
        Serial.println(led_count, DEC);
#endif
        push_btn = 1;
    }
    if (push_btn) {
      if (led_blink < 5) {
        led_blink++;
        col = led_count / NUMROWS;
        bitWrite(data[col], led_count % NUMROWS, led_blink % 2);
        delay(BLINKTIME);
      }
      else {
        led_count++;
        led_blink = 1;
        push_btn = 0;
      }
    }
}

void setup(){
    #ifdef DEBUG
    Serial.begin(57600);
    #endif
    for (uint8_t x=8; x < 23; x++) {
        pinMode(x, OUTPUT);
    }
    clrmem();
    pinMode(INBTN, INPUT_PULLUP);
    #ifdef DEBUG
    Serial.println(F("Monitor pronto"));
    #endif
    Timer1.initialize(9761);            // set a timer of length 5 milliseconds
    Timer1.attachInterrupt(refresh);    // attach the service routine here
}

void loop() {
    btn_press();
    if (led_count >= MAX_LEDS) countdown();
}