109 lines
3.0 KiB
C++
109 lines
3.0 KiB
C++
/*
|
|
* TimeSerialDateStrings.pde
|
|
* example code illustrating Time library date strings
|
|
*
|
|
* This sketch adds date string functionality to TimeSerial sketch
|
|
* Also shows how to handle different messages
|
|
*
|
|
* A message starting with a time header sets the time
|
|
* A Processing example sketch to automatically send the messages is inclided in the download
|
|
* On Linux, you can use "date +T%s\n > /dev/ttyACM0" (UTC time zone)
|
|
*
|
|
* A message starting with a format header sets the date format
|
|
|
|
* send: Fs\n for short date format
|
|
* send: Fl\n for long date format
|
|
*/
|
|
|
|
#include <TimeLib.h>
|
|
|
|
// single character message tags
|
|
#define TIME_HEADER 'T' // Header tag for serial time sync message
|
|
#define FORMAT_HEADER 'F' // Header tag indicating a date format message
|
|
#define FORMAT_SHORT 's' // short month and day strings
|
|
#define FORMAT_LONG 'l' // (lower case l) long month and day strings
|
|
|
|
#define TIME_REQUEST 7 // ASCII bell character requests a time sync message
|
|
|
|
static boolean isLongFormat = true;
|
|
|
|
void setup() {
|
|
Serial.begin(9600);
|
|
while (!Serial) ; // Needed for Leonardo only
|
|
setSyncProvider( requestSync); //set function to call when sync required
|
|
Serial.println("Waiting for sync message");
|
|
}
|
|
|
|
void loop(){
|
|
if (Serial.available() > 1) { // wait for at least two characters
|
|
char c = Serial.read();
|
|
if( c == TIME_HEADER) {
|
|
processSyncMessage();
|
|
}
|
|
else if( c== FORMAT_HEADER) {
|
|
processFormatMessage();
|
|
}
|
|
}
|
|
if (timeStatus()!= timeNotSet) {
|
|
digitalClockDisplay();
|
|
}
|
|
delay(1000);
|
|
}
|
|
|
|
void digitalClockDisplay() {
|
|
// digital clock display of the time
|
|
Serial.print(hour());
|
|
printDigits(minute());
|
|
printDigits(second());
|
|
Serial.print(" ");
|
|
if(isLongFormat)
|
|
Serial.print(dayStr(weekday()));
|
|
else
|
|
Serial.print(dayShortStr(weekday()));
|
|
Serial.print(" ");
|
|
Serial.print(day());
|
|
Serial.print(" ");
|
|
if(isLongFormat)
|
|
Serial.print(monthStr(month()));
|
|
else
|
|
Serial.print(monthShortStr(month()));
|
|
Serial.print(" ");
|
|
Serial.print(year());
|
|
Serial.println();
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
void processFormatMessage() {
|
|
char c = Serial.read();
|
|
if( c == FORMAT_LONG){
|
|
isLongFormat = true;
|
|
Serial.println(F("Setting long format"));
|
|
}
|
|
else if( c == FORMAT_SHORT) {
|
|
isLongFormat = false;
|
|
Serial.println(F("Setting short format"));
|
|
}
|
|
}
|
|
|
|
void processSyncMessage() {
|
|
unsigned long pctime;
|
|
const unsigned long DEFAULT_TIME = 1357041600; // Jan 1 2013 - paul, perhaps we define in time.h?
|
|
|
|
pctime = Serial.parseInt();
|
|
if( pctime >= DEFAULT_TIME) { // check the integer is a valid time (greater than Jan 1 2013)
|
|
setTime(pctime); // Sync Arduino clock to the time received on the serial port
|
|
}
|
|
}
|
|
|
|
time_t requestSync() {
|
|
Serial.write(TIME_REQUEST);
|
|
return 0; // the time will be sent later in response to serial mesg
|
|
}
|