/*

https://github.com/Treboada/Ds1302
A C/C++ library to use DS1302 RTC chip.

https://github.com/avishorp/TM1637
Arduino library for TM1637 (LED Driver)

*/

#include <Ds1302.h>
#include "TM1637Display.h"

#define CLK1 9
#define DIO1 10
#define CLK2 11
#define DIO2 12
#define DS1302_RAMSIZE 31

Ds1302 rtc(5, 7, 6);
TM1637Display display1(CLK1, DIO1);
TM1637Display display2(CLK2, DIO2);

uint8_t prev_second;
const char data[] = "Hello World";

const static char* WeekDays[] =
{
    "Monday",
    "Tuesday",
    "Wednesday",
    "Thursday",
    "Friday",
    "Saturday",
    "Sunday"
};

void setup()
{
    Serial.begin(115200);
    display1.setBrightness(7);
    display2.setBrightness(7);

    rtc.init();

    Ds1302::DateTime dt = {
        .year = 22,
        .month = Ds1302::MONTH_NOV,
        .day = 27,
        .hour = 2,
        .minute = 15,
        .second = 30,
        .dow = Ds1302::DOW_SUN
    };

    rtc.setDateTime(&dt);

    for (int i = 0; i < 11; ++i)
    {
        pinMode(6, OUTPUT);
        shiftOut(6, 7, LSBFIRST, 0xC0 + 2 * i);
        shiftOut(6, 7, LSBFIRST, data[i]);
    }
}

uint8_t readByte() 
{
    pinMode(6, INPUT);
    uint8_t value = 0;
    for (uint8_t i = 0; i < 8; ++i) 
    {
        uint8_t bit = digitalRead(6);
        value |= (bit << i);
        digitalWrite(7, HIGH);
        digitalWrite(7, LOW);
    }
    return value;
}

void printTime(Ds1302::DateTime &now)
{
    Serial.print("20");
    Serial.print(now.year);
    Serial.print('-');

    if (now.month < 10) 
    {
        Serial.print('0');
    }

    Serial.print(now.month);
    Serial.print('-');

    if (now.day < 10) 
    {
        Serial.print('0');
    }

    Serial.print(now.day);
    Serial.print(' ');
    Serial.print(WeekDays[now.dow - 1]);
    Serial.print(' ');

    if (now.hour < 10) 
    {
        Serial.print('0');
    }

    Serial.print(now.hour);
    Serial.print(':');

    if (now.minute < 10) 
    {
        Serial.print('0');
    }

    Serial.print(now.minute);
    Serial.print(':');

    if (now.second < 10) 
    {
        Serial.print('0');
    }

    Serial.print(now.second);
    Serial.println();
}

void loop()
{
    Ds1302::DateTime now;
    rtc.getDateTime(&now);

    if (now.second != prev_second)
    {
        prev_second = now.second;
        uint8_t ram[DS1302_RAMSIZE];

        for (int i = 0; i < 11; ++i)
        {
            pinMode(6, OUTPUT);
            shiftOut(6, 7, LSBFIRST, 0xC1 + 2 * i);
            ram[i] = readByte();
        }
        
        Serial.print((const char*)ram);
        Serial.print(' ');
        printTime(now);
    }

    display1.showNumberDec(now.hour, 0x80, 2, 2);
    display2.showNumberDecEx(now.minute, 0x80, 2, 2);
    display2.showNumberDecEx(now.second, 0x80, true, 2, 2);

    delay(100);
}