RTC โมดูลนาฬิกา DS3231 I2C SNP-00028

1#include <Wire.h>
2
3#define DS1307_I2C_ADDRESS 0x68 // the I2C address of Tiny RTC
4
5// Declare variables for storing time data
6byte second, minute, hour, dayOfWeek, dayOfMonth, month, year;
7
8// Convert normal decimal numbers to binary coded decimal
9byte decToBcd(byte val) {
10    return ((val / 10 * 16) + (val % 10));
11}
12
13// Convert binary coded decimal to normal decimal numbers
14byte bcdToDec(byte val) {
15    return ((val / 16 * 10) + (val % 16));
16}
17
18// Function to set the current time
19void setDateDs1307() {
20    // Set your current time here
21    second = 0;        // Seconds
22    minute = 30;       // Minutes
23    hour = 10;         // Hours (24-hour format)
24    dayOfWeek = 5;     // Day of week (1=Sunday, 2=Monday, ..., 7=Saturday)
25    dayOfMonth = 1;    // Day of month
26    month = 8;         // Month
27    year = 24;         // Year (20xx)
28
29    Wire.beginTransmission(DS1307_I2C_ADDRESS);
30    Wire.write(0); // Reset register pointer
31    Wire.write(decToBcd(second) & 0x7F); // 0 to bit 7 starts the clock
32    Wire.write(decToBcd(minute));
33    Wire.write(decToBcd(hour));
34    Wire.write(decToBcd(dayOfWeek));
35    Wire.write(decToBcd(dayOfMonth));
36    Wire.write(decToBcd(month));
37    Wire.write(decToBcd(year));
38    Wire.endTransmission();
39}
40
41// Function to get the date and time from the DS1307
42void getDateDs1307() {
43    // Reset the register pointer
44    Wire.beginTransmission(DS1307_I2C_ADDRESS);
45    Wire.write(0);
46    Wire.endTransmission();
47
48    Wire.requestFrom(DS1307_I2C_ADDRESS, 7);
49
50    // Read the data
51    second = bcdToDec(Wire.read() & 0x7F);
52    minute = bcdToDec(Wire.read());
53    hour = bcdToDec(Wire.read() & 0x3F);
54    dayOfWeek = bcdToDec(Wire.read());
55    dayOfMonth = bcdToDec(Wire.read());
56    month = bcdToDec(Wire.read());
57    year = bcdToDec(Wire.read());
58
59    // Print the time and date
60    Serial.print(hour, DEC);
61    Serial.print(":");
62    Serial.print(minute, DEC);
63    Serial.print(":");
64    Serial.print(second, DEC);
65    Serial.print(" ");
66    Serial.print(month, DEC);
67    Serial.print("/");
68    Serial.print(dayOfMonth, DEC);
69    Serial.print("/");
70    Serial.print(year, DEC);
71    Serial.print(" ");
72    Serial.println();
73}
74
75void setup() {
76    Wire.begin();
77    Serial.begin(9600);
78
79    setDateDs1307(); // Set the current time; comment this out after setting
80}
81
82void loop() {
83    delay(2000);
84    getDateDs1307(); // Get the time data from the RTC and print it
85}
86

1#include <Wire.h>
2
3#define DS1307_I2C_ADDRESS 0x68 // the I2C address of Tiny RTC
4
5// Declare variables for storing time data
6byte second, minute, hour, dayOfWeek, dayOfMonth, month, year;
7
8// Convert normal decimal numbers to binary coded decimal
9byte decToBcd(byte val) {
10    return ((val / 10 * 16) + (val % 10));
11}
12
13// Convert binary coded decimal to normal decimal numbers
14byte bcdToDec(byte val) {
15    return ((val / 16 * 10) + (val % 16));
16}
17
18// Function to get the date and time from the DS1307
19void getDateDs1307() {
20    // Reset the register pointer
21    Wire.beginTransmission(DS1307_I2C_ADDRESS);
22    Wire.write(0);
23    Wire.endTransmission();
24
25    Wire.requestFrom(DS1307_I2C_ADDRESS, 7);
26
27    // Read the data
28    second = bcdToDec(Wire.read() & 0x7F);
29    minute = bcdToDec(Wire.read());
30    hour = bcdToDec(Wire.read() & 0x3F);
31    dayOfWeek = bcdToDec(Wire.read());
32    dayOfMonth = bcdToDec(Wire.read());
33    month = bcdToDec(Wire.read());
34    year = bcdToDec(Wire.read());
35
36    // Print the time and date
37    Serial.print(hour, DEC);
38    Serial.print(":");
39    Serial.print(minute, DEC);
40    Serial.print(":");
41    Serial.print(second, DEC);
42    Serial.print(" ");
43    Serial.print(month, DEC);
44    Serial.print("/");
45    Serial.print(dayOfMonth, DEC);
46    Serial.print("/");
47    Serial.print(year, DEC);
48    Serial.print(" ");
49    Serial.println();
50}
51
52void setup() {
53    Wire.begin();
54    Serial.begin(9600);
55}
56
57void loop() {
58    delay(2000);
59    getDateDs1307(); // Get the time data from the RTC and print it
60}
61