There's an ino file in the download section. But I've looked at it and not quite understanding the detail mainly because I've not used tiny RTC before. I want to know what change would i need to make to convert from 24 hours format to 12 hours format.
Please post the program here and tell us which part you are having difficulty understanding.
...R
#include <SPI.h>
#include <Wire.h>
#include "RTClib.h"
RTC_DS3231 rtc;
int SPI_CS = 10;
byte segment_array[][3] =
{
// row 0 row 1 row 2
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
// row 0 row 1 row 2
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
// row 0 row 1 row 2
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
// row 0 row 1 row 2
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
// row 0 row 1 row 2
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
// row 0 row 1 row 2
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
{ 0b00000000, 0b00000000, 0b00000000,},
};
void putPixel(byte x, byte y, byte thebyte)
{
byte bx = x*8;
byte by = y;
int row = 1;
if(by >= 8 && by <= 15){
by = by-8;
row = 2;
}
if(by >= 16 && by <= 24){
by = by-16;
row = 3;
}
segment_array[bx+by][row] = thebyte;
}
void addPixel(byte x, byte y, byte thebyte)
{
byte bx = x*8;
byte by = y;
int row = 1;
if(by >= 8 && by <= 15){
by = by-8;
row = 2;
}
if(by >= 16 && by <= 24){
by = by-16;
row = 3;
}
segment_array[bx+by][row] |= thebyte;
}
void fillPixel(byte x1, byte y1, byte x2, byte y2, byte thebyte)
{
for(int i=x1; i<=(x2); i++){
for(int j=y1; j<=(y2); j++){
putPixel(i, j, thebyte);
}
}
}
void ClearSegmentArray()
{
fillPixel(0, 0, 5, 23, 0x00);
}
void DisplaySegmentArray(){
for(int i=1; i<9; i++){
MAX7219Send(
i, segment_array[i-1+40][3], i, segment_array[i-1+40][2], i, segment_array[i-1+40][1],
i, segment_array[i-1+32][3], i, segment_array[i-1+32][2], i, segment_array[i-1+32][1],
i, segment_array[i-1+24][3], i, segment_array[i-1+24][2], i, segment_array[i-1+24][1],
i, segment_array[i-1+16][3], i, segment_array[i-1+16][2], i, segment_array[i-1+16][1],
i, segment_array[i-1+8][3], i, segment_array[i-1+8][2], i, segment_array[i-1+8][1],
i, segment_array[i-1][3], i, segment_array[i-1][2], i, segment_array[i-1][1]);
}
}
void MAX7219Send(
uint8_t address, uint8_t value,
uint8_t addressb, uint8_t valueb,
uint8_t addressc, uint8_t valuec,
uint8_t addressd, uint8_t valued,
uint8_t addresse, uint8_t valuee,
uint8_t addressf, uint8_t valuef,
uint8_t addressg, uint8_t valueg,
uint8_t addressh, uint8_t valueh,
uint8_t addressi, uint8_t valuei,
uint8_t addressj, uint8_t valuej,
uint8_t addressk, uint8_t valuek,
uint8_t addressl, uint8_t valuel,
uint8_t addressm, uint8_t valuem,
uint8_t addressn, uint8_t valuen,
uint8_t addresso, uint8_t valueo,
uint8_t addressp, uint8_t valuep,
uint8_t addressq, uint8_t valueq,
uint8_t addressr, uint8_t valuer){
digitalWrite(SPI_CS, LOW);
SPI.transfer(address);
SPI.transfer(value);
SPI.transfer(addressb);
SPI.transfer(valueb);
SPI.transfer(addressc);
SPI.transfer(valuec);
SPI.transfer(addressd);
SPI.transfer(valued);
SPI.transfer(addresse);
SPI.transfer(valuee);
SPI.transfer(addressf);
SPI.transfer(valuef);
SPI.transfer(addressg);
SPI.transfer(valueg);
SPI.transfer(addressh);
SPI.transfer(valueh);
SPI.transfer(addressi);
SPI.transfer(valuei);
SPI.transfer(addressj);
SPI.transfer(valuej);
SPI.transfer(addressk);
SPI.transfer(valuek);
SPI.transfer(addressl);
SPI.transfer(valuel);
SPI.transfer(addressm);
SPI.transfer(valuem);
SPI.transfer(addressn);
SPI.transfer(valuen);
SPI.transfer(addresso);
SPI.transfer(valueo);
SPI.transfer(addressp);
SPI.transfer(valuep);
SPI.transfer(addressq);
SPI.transfer(valueq);
SPI.transfer(addressr);
SPI.transfer(valuer);
digitalWrite(SPI_CS, HIGH);
}
void setup() {
pinMode(SPI_CS, OUTPUT);
SPI.begin();
MAX7219Send(
0x0F, 0x00, 0x0F, 0x00, 0x0F, 0x00, 0x0F, 0x00, 0x0F, 0x00, 0x0F, 0x00,
0x0F, 0x00, 0x0F, 0x00, 0x0F, 0x00, 0x0F, 0x00, 0x0F, 0x00, 0x0F, 0x00,
0x0F, 0x00, 0x0F, 0x00, 0x0F, 0x00, 0x0F, 0x00, 0x0F, 0x00, 0x0F, 0x00);
MAX7219Send(
0x09, 0x00, 0x09, 0x00, 0x09, 0x00, 0x09, 0x00, 0x09, 0x00, 0x09, 0x00,
0x09, 0x00, 0x09, 0x00, 0x09, 0x00, 0x09, 0x00, 0x09, 0x00, 0x09, 0x00,
0x09, 0x00, 0x09, 0x00, 0x09, 0x00, 0x09, 0x00, 0x09, 0x00, 0x09, 0x00);
MAX7219Send(
0x0B, 0x07, 0x0B, 0x07, 0x0B, 0x07, 0x0B, 0x07, 0x0B, 0x07, 0x0B, 0x07,
0x0B, 0x07, 0x0B, 0x07, 0x0B, 0x07, 0x0B, 0x07, 0x0B, 0x07, 0x0B, 0x07,
0x0B, 0x07, 0x0B, 0x07, 0x0B, 0x07, 0x0B, 0x07, 0x0B, 0x07, 0x0B, 0x07);
MAX7219Send(
0x0C, 0x01, 0x0C, 0x01, 0x0C, 0x01, 0x0C, 0x01, 0x0C, 0x01, 0x0C, 0x01,
0x0C, 0x01, 0x0C, 0x01, 0x0C, 0x01, 0x0C, 0x01, 0x0C, 0x01, 0x0C, 0x01,
0x0C, 0x01, 0x0C, 0x01, 0x0C, 0x01, 0x0C, 0x01, 0x0C, 0x01, 0x0C, 0x01);
MAX7219Send(
0x0A, 0x13, 0x0A, 0x13, 0x0A, 0x13, 0x0A, 0x13, 0x0A, 0x13, 0x0A, 0x13,
0x0A, 0x13, 0x0A, 0x13, 0x0A, 0x13, 0x0A, 0x13, 0x0A, 0x13, 0x0A, 0x13,
0x0A, 0x13, 0x0A, 0x13, 0x0A, 0x13, 0x0A, 0x13, 0x0A, 0x13, 0x0A, 0x13);
for (int y=0; y<=8; y++) {
MAX7219Send(
y, 0x00, y, 0x00, y, 0x00, y, 0x00, y, 0x00, y, 0x00,
y, 0x00, y, 0x00, y, 0x00, y, 0x00, y, 0x00, y, 0x00,
y, 0x00, y, 0x00, y, 0x00, y, 0x00, y, 0x00, y, 0x00);
}
Serial.begin(9600);
if (! rtc.begin()) {
Serial.println("Couldn't find RTC");
while(1);
}
if (rtc.lostPower()) {
Serial.println("RTC lost power, lets set the time!");
rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
}
}
(cut due to 9000 char limit)
void loop() {
DateTime now = rtc.now();
ClearSegmentArray();
digits(0, (now.hour()/10)%10);
digits(5, now.hour()%10);
digits(13, (now.minute()/10)%10);
digits(18, now.minute()%10);
putPixel(1, 12, 0b00011101);
putPixel(4, 11, 0b00011101);
DisplaySegmentArray();
delay(600);
putPixel(1, 12, 0b00000000);
putPixel(4, 11, 0b00000000);
DisplaySegmentArray();
delay(800);
putPixel(1, 12, 0b00011101);
putPixel(4, 11, 0b00011101);
DisplaySegmentArray();
delay(200);
}
void digits(byte place, byte value){
switch (value) {
case 0:
putPixel(0, place+2, 0b00011000);
putPixel(0, place+3, 0b00111101);
putPixel(0, place+4, 0b01111111);
putPixel(0, place+5, 0b00011111);
putPixel(1, place+1, 0b00010000);
fillPixel(1, place+2, 1, place+5, 0b01111111);
putPixel(1, place+3, 0b01100111);
putPixel(1, place+4, 0b01111011);
putPixel(2, place+2, 0b01101111);
putPixel(2, place+5, 0b01001111);
putPixel(2, place+1, 0b01111101);
putPixel(2, place+4, 0b00110000);
fillPixel(3, place+1, 3, place+4, 0b01111111);
putPixel(3, place+3, 0b00010000);
putPixel(3, place+2, 0b00000110);
addPixel(3, place+5, 0b00000110);
fillPixel(4, place+1, 4, place+3, 0b01111111);
putPixel(4, place+2, 0b00011111);
putPixel(4, place+4, 0b01000111);
putPixel(5, place+1, 0b01110011);
putPixel(5, place+2, 0b01111111);
putPixel(5, place+3, 0b01100111);
break;
case 1:
putPixel(0, place+3, 0b00010000);
putPixel(0, place+4, 0b01111111);
putPixel(0, place+5, 0b00011111);
fillPixel(1, place+3, 1, place+4, 0b01111111);
putPixel(1, place+5, 0b00000110);
putPixel(2, place+2, 0b00111101);
putPixel(2, place+3, 0b01111111);
putPixel(2, place+4, 0b01001111);
fillPixel(3, place+2, 3, place+3, 0b01111111);
putPixel(3, place+1, 0b00110000);
putPixel(3, place+4, 0b00000110);
fillPixel(4, place+1, 4, place+2, 0b01111111);
putPixel(4, place+3, 0b01000110);
putPixel(5, place, 0b00100000);
putPixel(5, place+1, 0b01111111);
putPixel(5, place+2, 0b01111111);
putPixel(5, place+3, 0b00000000);
break;
case 2:
putPixel(0, place+2, 0b00011000);
putPixel(0, place+3, 0b00111101);
putPixel(0, place+4, 0b01111111);
putPixel(0, place+5, 0b00011111);
putPixel(1, place+1, 0b00110000);
putPixel(1, place+2, 0b01111111);
putPixel(1, place+3, 0b01100010);
putPixel(1, place+4, 0b01111011);
putPixel(1, place+5, 0b01111111);
putPixel(2, place+3, 0b00111000);
putPixel(2, place+4, 0b01111111);
putPixel(2, place+5, 0b01000110);
putPixel(3, place+2, 0b00111101);
putPixel(3, place+3, 0b01111111);
putPixel(3, place+4, 0b01000110);
addPixel(4, place, 0b00010000);
fillPixel(4, place+1, 4, place+2, 0b01111111);
putPixel(4, place+3, 0b01000110);
putPixel(5, place, 0b00100000);
putPixel(5, place+1, 0b01110011);
fillPixel(5, place+2, 5, place+3, 0b01111111);
putPixel(5, place+4, 0b01100111);
break;
case 3:
putPixel(0, place+2, 0b00011000);
fillPixel(0, place+3, 0, place+4, 0b01111111);
putPixel(0, place+5, 0b00011111);
putPixel(1, place+1, 0b00100000);
putPixel(1, place+2, 0b01111111);
putPixel(1, place+3, 0b01100010);
putPixel(1, place+4, 0b01111011);
putPixel(1, place+5, 0b01111111);
putPixel(2, place+2, 0b00011000);
fillPixel(2, place+3, 4, place+4, 0b01111111);
putPixel(2, place+3, 0b00111101);
putPixel(2, place+5, 0b01000110);
putPixel(3, place+2, 0b01100000);
putPixel(3, place+3, 0b01110011);
putPixel(3, place+5, 0b00000100);
putPixel(4, place+2, 0b00011101);
putPixel(4, place+1, 0b00011000);
putPixel(4, place+3, 0b00111101);
addPixel(4, place+5, 0b00000110);
putPixel(5, place, 0b00100000);
putPixel(5, place+1, 0b01110011);
fillPixel(5, place+2, 5, place+3, 0b01111111);
putPixel(5, place+4, 0b01000010);
break;
case 4:
putPixel(0, place+2, 0b00111000);
putPixel(0, place+3, 0b01111111);
putPixel(0, place+4, 0b00010000);
putPixel(0, place+5, 0b01111111);
putPixel(1, place+1, 0b00010000);
fillPixel(1, place+2, 2, place+2, 0b01111111);
putPixel(1, place+3, 0b01000110);
putPixel(1, place+4, 0b01111101);
putPixel(1, place+5, 0b01001111);
putPixel(2, place+1, 0b01111101);
putPixel(2, place+3, 0b00111000);
putPixel(2, place+4, 0b01111111);
putPixel(2, place+5, 0b00000110);
fillPixel(3, place+1, 3, place+4, 0b01111111);
putPixel(3, place+5, 0b00000000);
addPixel(3, place, 0b00010000);
putPixel(4, place+2, 0b00010000);
putPixel(4, place+3, 0b01111111);
putPixel(4, place+4, 0b00000110);
putPixel(5, place+2, 0b01111111);
putPixel(5, place+3, 0b01100111);
break;
case 5:
putPixel(0, place+2, 0b00111101);
fillPixel(0, place+3, 0, place+5, 0b01111111);
putPixel(1, place+1, 0b00110000);
putPixel(1, place+2, 0b01111111);
putPixel(1, place+3, 0b01011111);
putPixel(1, place+4, 0b00001100);
putPixel(2, place+3, 0b01111111);
putPixel(2, place+2, 0b01110011);
putPixel(2, place+4, 0b01111111);
putPixel(2, place+5, 0b00000110);
putPixel(3, place+3, 0b00110000);
fillPixel(3, place+4, 4, place+4, 0b01111111);
putPixel(3, place+5, 0b00000110);
fillPixel(4, place+1, 4, place+2, 0b00011101);
putPixel(4, place+3, 0b00111101);
putPixel(4, place+5, 0b00000010);
putPixel(5, place, 0b00100000);
fillPixel(5, place+1, 5, place+2, 0b01111111);
putPixel(5, place+3, 0b01100111);
putPixel(5, place+4, 0b01000010);
break;
case 6:
putPixel(0, place+3, 0b00011000);
putPixel(0, place+4, 0b01111111);
putPixel(0, place+5, 0b00000110);
fillPixel(1, place+2, 2, place+4, 0b01111111);
putPixel(1, place+2, 0b00111101);
putPixel(1, place+4, 0b01000010);
putPixel(2, place+1, 0b00111000);
putPixel(2, place+5, 0b00000100);
addPixel(3, place, 0b00010000);
fillPixel(3, place+1, 4, place+4, 0b01111111);
putPixel(3, place+2, 0b01000110);
putPixel(3, place+3, 0b01100000);
putPixel(3, place+5, 0b00000110);
addPixel(4, place, 0b00110000);
putPixel(4, place+2, 0b00011111);
putPixel(4, place+3, 0b00111101);
putPixel(5, place+1, 0b01110011);
putPixel(5, place+2, 0b01111111);
putPixel(5, place+3, 0b01100111);
break;
case 7:
putPixel(0, place+1, 0b00110000);
fillPixel(0, place+2, 0, place+4, 0b01111111);
putPixel(0, place+5, 0b00011111);
putPixel(1, place+1, 0b00100000);
putPixel(1, place+2, 0b01100011);
putPixel(1, place+3, 0b01100011);
putPixel(1, place+4, 0b01111111);
putPixel(1, place+5, 0b01111111);
putPixel(2, place+5, 0b01000110);
putPixel(2, place+4, 0b01111111);
putPixel(2, place+3, 0b00111101);
putPixel(3, place+2, 0b00111101);
putPixel(3, place+3, 0b01111111);
putPixel(3, place+4, 0b01100111);
putPixel(4, place+1, 0b00111101);
putPixel(4, place+2, 0b01111111);
putPixel(4, place+3, 0b01000110);
fillPixel(5, place+1, 5, place+2, 0b01111111);
putPixel(5, place, 0b00100000);
break;
case 8:
putPixel(0, place+2, 0b00011000);
fillPixel(0, place+3, 0, place+4, 0b01111111);
putPixel(0, place+5, 0b00011111);
putPixel(1, place+1, 0b00110000);
putPixel(1, place+2, 0b01111111);
putPixel(1, place+3, 0b01100010);
putPixel(1, place+4, 0b01111011);
putPixel(1, place+5, 0b01111111);
putPixel(2, place+1, 0b00100000);
putPixel(2, place+2, 0b01111111);
fillPixel(2, place+3, 4, place+4, 0b01111111);
putPixel(2, place+3, 0b00111101);
putPixel(2, place+5, 0b01000110);
putPixel(3, place+1, 0b00111101);
putPixel(3, place+2, 0b01100111);
putPixel(3, place+3, 0b01110011);
putPixel(3, place+5, 0b00000100);
putPixel(4, place+2, 0b00011101);
putPixel(4, place+1, 0b01111111);
putPixel(4, place+3, 0b00111101);
addPixel(4, place+5, 0b00000110);
addPixel(4, place, 0b00110000);
putPixel(5, place+1, 0b01110011);
fillPixel(5, place+2, 5, place+3, 0b01111111);
putPixel(5, place+4, 0b01000010);
break;
case 9:
putPixel(0, place+2, 0b00011101);
putPixel(0, place+3, 0b01111111);
putPixel(0, place+4, 0b00011111);
putPixel(0, place+5, 0b00001100);
fillPixel(1, place+1, 3, place+4, 0b01111111);
putPixel(1, place+1, 0b00111000);
putPixel(1, place+3, 0b01100011);
putPixel(1, place+4, 0b01111011);
putPixel(1, place+5, 0b01111111);
putPixel(2, place+2, 0b01011111);
putPixel(2, place+3, 0b00011100);
putPixel(2, place+5, 0b01001111);
putPixel(3, place+1, 0b01100000);
putPixel(3, place+2, 0b01111011);
putPixel(3, place+5, 0b00000010);
putPixel(4, place+1, 0b00011000);
putPixel(4, place+2, 0b01111111);
putPixel(4, place+3, 0b01100111);
putPixel(5, place, 0b00100000);
putPixel(5, place+1, 0b01111111);
putPixel(5, place+2, 0b01000110);
break;
}
}
I think just at the beginning of main loop, it gets time info and breaks it up into digits but I don't know. I don't have tiny RTC to experiment with.
(deleted)
wilykat:
(cut due to 9000 char limit)
If the program won't fit then post the .ino file as an attachment. I'm not going to try to join parts together in case I introduce an error.
...R
If you have --
this UNO Module:
,
this RTC3231 Module:
,
this Serial Monitor:
,
this 2x16 I2CLCD Module:
,
and this 6-digit CC7SD Module:
,
then begin to develop your own Clock System from scratch. This will be much more enjoyable and rewarding rather than playing with the codes of others which for most of the times make meaning to the original writer.
Tasks:
1. Connect RTC3231 Module with UNO and show time of the day in 12 Hrs format on the Serial Monitor.
2. Connect 2x16 I2LCD Module with UNO and show time of the day in 12 Hrs format on the LCD.
3. Disconnect 2x16 I2C LCD Module from the UNO and connect 6-digit CC7SD display unit with the UNO and then show time of the day in 12 Hrs format on the 7-segment display unit.