i have make a clock based on max7219 display and ds1307 rtc to shows tome in 12hr format. it works but when it reach on 12pm it shows 0:00 . i want to make it 12:00 . in midnight 12am it shows 0:00 that's no problem but in noon 12 if it showing 0:00 it is problematic. can any one help me?
#include "Arduino.h"
#include <Wire.h>
#include "RTClib.h"
RTC_DS1307 RTC;
String date;
#define NUM_MAX 4
#define LINE_WIDTH 16
#define ROTATE 90
// for NodeMCU 1.0
#define DIN_PIN 15 // D8
#define CS_PIN 13 // D7
#define CLK_PIN 12 // D6
#include "max7219.h"
#include "fonts.h"
// =======================================================================
// CHANGE YOUR CONFIG HERE:
// =======================================================================
void setup() {
Wire.begin();
RTC.begin();
//RTC.adjust(DateTime(F(__DATE__), F(__TIME__)));
Serial.begin(115200);
initMAX7219();
sendCmdAll(CMD_SHUTDOWN, 1);
Serial.print("Connected to RTC module.");
}
// =======================================================================
#define MAX_DIGITS 16
byte dig[MAX_DIGITS] = {0};
byte digold[MAX_DIGITS] = {0};
byte digtrans[MAX_DIGITS] = {0};
int updCnt = 0;
int dots = 0;
long dotTime = 0;
long clkTime = 0;
int dx = 0;
int dy = 0;
byte del = 0;
int h, m, s;
long localEpoc = 0;
long localMillisAtUpdate = 0;
// =======================================================================
void loop() {
DateTime now = RTC.now();
h = now.hour();
m = now.minute();
s = now.second();
if (updCnt <= 0) { // every 10 scrolls, ~450s=7.5m
updCnt = 10;
Serial.println("Getting DateTime now ...");
//printStringWithShift(" Getting DateTime now", 15);
DateTime now();
Serial.println("DateTime now loaded");
clkTime = millis();
}
if (millis() - clkTime > 20000 && !del && dots) { // clock for 15s, then scrolls for about 30s
//printStringWithShift(date.c_str(), 40);
//delay(7000);
updCnt--;
clkTime = millis();
}
if (millis() - dotTime > 500) {
dotTime = millis();
dots = !dots;
}
updateTime();
showAnimClock();
// Adjusting LED intensity.
// 12am to 6am, lowest intensity 0
if ((h == 0) || ((h >= 1) && (h <= 6))) sendCmdAll(CMD_INTENSITY, 4);
// 6pm to 11pm, intensity = 2
else if ((h >= 18) && (h <= 23)) sendCmdAll(CMD_INTENSITY, 4);
// max brightness during bright daylight
else sendCmdAll(CMD_INTENSITY, 4);
}
// =======================================================================
void showSimpleClock() {
dx = dy = 0;
clr();
// Convert hours to 12-hour format and set AM/PM
int displayHour = h % 12;
int isPM = h >= 12;
showDigit(displayHour / 10, 4, dig6x8);
showDigit(displayHour % 10, 12, dig6x8);
showDigit(m / 10, 21, dig6x8);
showDigit(m % 10, 29, dig6x8);
showDigit(s / 10, 38, dig6x8);
showDigit(s % 10, 46, dig6x8);
setCol(19, dots ? B00100100 : 0);
setCol(36, dots ? B00100100 : 0);
refreshAll();
}
void showAnimClock() {
byte digPos[4] = {1, 8, 17, 25};
int digHt = 12;
int num = 4;
int i;
if (del == 0) {
del = digHt;
for (i = 0; i < num; i++) digold[i] = dig[i];
dig[0] = (h % 12) / 10 ? (h % 12) / 10 : 10;
dig[1] = (h % 12) % 10;
dig[2] = m / 10;
dig[3] = m % 10;
for (i = 0; i < num; i++) digtrans[i] = (dig[i] == digold[i]) ? 0 : digHt;
} else
del--;
clr();
for (i = 0; i < num; i++) {
if (digtrans[i] == 0) {
dy = 0;
showDigit(dig[i], digPos[i], dig6x8);
} else {
dy = digHt - digtrans[i];
showDigit(digold[i], digPos[i], dig6x8);
dy = -digtrans[i];
showDigit(dig[i], digPos[i], dig6x8);
digtrans[i]--;
}
}
dy = 0;
setCol(15, dots ? B00100100 : 0);
refreshAll();
delay(30);
}
// =======================================================================
void showDigit(char ch, int col, const uint8_t *font) {
if (dy < -8 || dy > 8) return;
int len = pgm_read_byte(font);
int w = pgm_read_byte(font + 1 + ch * len);
col += dx;
for (int i = 0; i < w; i++)
if (col + i >= 0 && col + i < 8 * NUM_MAX) {
byte v = pgm_read_byte(font + 1 + ch * len + 1 + i);
if (!dy) scr[col + i] = v;
else scr[col + i] |= dy > 0 ? v >> dy : v << -dy;
}
}
// =======================================================================
void setCol(int col, byte v) {
if (dy < -8 || dy > 8) return;
col += dx;
if (col >= 0 && col < 8 * NUM_MAX)
if (!dy) scr[col] = v;
else scr[col] |= dy > 0 ? v >> dy : v << -dy;
}
// =======================================================================
int showChar(char ch, const uint8_t *font) {
int len = pgm_read_byte(font);
int i, w = pgm_read_byte(font + 1 + ch * len);
for (i = 0; i < w; i++)
scr[NUM_MAX * 8 + i] = pgm_read_byte(font + 1 + ch * len + 1 + i);
scr[NUM_MAX * 8 + i] = 0;
return w;
}
// =======================================================================
void printCharWithShift(unsigned char c, int shiftDelay) {
if (c < ' ' || c > '~' + 25) return;
c -= 32;
int w = showChar(c, font);
for (int i = 0; i < w + 1; i++) {
delay(shiftDelay);
scrollLeft();
refreshAll();
}
}
// =======================================================================
void printStringWithShift(const char *s, int shiftDelay) {
while (*s) {
printCharWithShift(*s, shiftDelay);
s++;
}
}
// =======================================================================
void updateTime() {
}