You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
79 lines
1.8 KiB
C++
79 lines
1.8 KiB
C++
/*
|
|
* TimeRTC.pde
|
|
* example code illustrating Time library with Real Time Clock.
|
|
*
|
|
*/
|
|
|
|
#include <TimeLib.h>
|
|
|
|
void setup() {
|
|
// set the Time library to use Teensy 3.0's RTC to keep time
|
|
setSyncProvider(getTeensy3Time);
|
|
|
|
Serial.begin(115200);
|
|
while (!Serial); // Wait for Arduino Serial Monitor to open
|
|
delay(100);
|
|
if (timeStatus()!= timeSet) {
|
|
Serial.println("Unable to sync with the RTC");
|
|
} else {
|
|
Serial.println("RTC has set the system time");
|
|
}
|
|
}
|
|
|
|
void loop() {
|
|
if (Serial.available()) {
|
|
time_t t = processSyncMessage();
|
|
if (t != 0) {
|
|
Teensy3Clock.set(t); // set the RTC
|
|
setTime(t);
|
|
}
|
|
}
|
|
digitalClockDisplay();
|
|
delay(1000);
|
|
}
|
|
|
|
void digitalClockDisplay() {
|
|
// digital clock display of the time
|
|
Serial.print(hour());
|
|
printDigits(minute());
|
|
printDigits(second());
|
|
Serial.print(" ");
|
|
Serial.print(day());
|
|
Serial.print(" ");
|
|
Serial.print(month());
|
|
Serial.print(" ");
|
|
Serial.print(year());
|
|
Serial.println();
|
|
}
|
|
|
|
time_t getTeensy3Time()
|
|
{
|
|
return Teensy3Clock.get();
|
|
}
|
|
|
|
/* code to process time sync messages from the serial port */
|
|
#define TIME_HEADER "T" // Header tag for serial time sync message
|
|
|
|
unsigned long processSyncMessage() {
|
|
unsigned long pctime = 0L;
|
|
const unsigned long DEFAULT_TIME = 1357041600; // Jan 1 2013
|
|
|
|
if(Serial.find(TIME_HEADER)) {
|
|
pctime = Serial.parseInt();
|
|
return pctime;
|
|
if( pctime < DEFAULT_TIME) { // check the value is a valid time (greater than Jan 1 2013)
|
|
pctime = 0L; // return 0 to indicate that the time is not valid
|
|
}
|
|
}
|
|
return pctime;
|
|
}
|
|
|
|
void printDigits(int digits){
|
|
// utility function for digital clock display: prints preceding colon and leading 0
|
|
Serial.print(":");
|
|
if(digits < 10)
|
|
Serial.print('0');
|
|
Serial.print(digits);
|
|
}
|
|
|