tengo un problema con el RTC1302 al momento de ejecutar el programa al principio si me dice la fecha y hora actual pero ya despues de unos segundos se me resetea y me marca la fecha hora del 01/01/2000 00:00:00 y la verdad ya he visto tutoriales pero no se me soluciona nada en el monitor serial. Al principio me dice la fecha y la hora actual y despues me arroja el siguiente mensaje "RTC is older than compile time! (Updating DateTime)"
y se me resetea. Utilizo la libreria de <RtcDS1302.h> y <ThreeWire.h> tambien he utilizando la libreria de virtualbox pero igual se me resetea este es el codigo y espero que me puedan ayudar.
// CONNECTIONS:
// DS1302 CLK/SCLK --> 5
// DS1302 DAT/IO --> 4
// DS1302 RST/CE --> 2
// DS1302 VCC --> 3.3v - 5v
// DS1302 GND --> GND
#include <ThreeWire.h>
#include <RtcDS1302.h>
ThreeWire myWire(4,5,2); // IO, SCLK, CE
RtcDS1302<ThreeWire> Rtc(myWire);
#define countof(a) (sizeof(a) / sizeof(a[0]))
const char data[] = "what time is it";
void setup ()
{
Serial.begin(57600);
Serial.print("compiled: ");
Serial.print(__DATE__);
Serial.println(__TIME__);
Rtc.Begin();
RtcDateTime compiled = RtcDateTime(__DATE__,__TIME__);
printDateTime(compiled);
Serial.println();
if (!Rtc.IsDateTimeValid())
{
Serial.println("RTC lost confidence in the DateTime!");
Rtc.SetDateTime(compiled);
}
if (Rtc.GetIsWriteProtected())
{
Serial.println("RTC was write protected, enabling writing now");
Rtc.SetIsWriteProtected(false);
}
if (!Rtc.GetIsRunning())
{
Serial.println("RTC was not actively running, starting now");
Rtc.SetIsRunning(true);
}
RtcDateTime now = Rtc.GetDateTime();
if (now < compiled)
{
Serial.println("RTC is older than compile time! (Updating DateTime)");
Rtc.SetDateTime(compiled);
}
/* comment out on a second run to see that the info is stored long term */
// Store something in memory on the RTC
uint8_t count = sizeof(data);
uint8_t written = Rtc.SetMemory((const uint8_t*)data, count); // this includes a null terminator for the string
if (written != count)
{
Serial.print("something didn't match, count = ");
Serial.print(count, DEC);
Serial.print(", written = ");
Serial.print(written, DEC);
Serial.println();
}
/* end of comment out section */
}
void loop ()
{
RtcDateTime now =Rtc.GetDateTime();
printDateTime(now);
Serial.println(" +");
if (!now.IsValid())
{
// Common Causes:
// 1) the battery on the device is low or even missing and the power line was disconnected
Serial.println("RTC lost confidence in the DateTime!");
}
delay(5000);
// read data
uint8_t buff[20];
const uint8_t count = sizeof(buff);
// get our data
uint8_t gotten = Rtc.GetMemory(buff, count);
if (gotten != count)
{
Serial.print("something didn't match, count = ");
Serial.print(count, DEC);
Serial.print(", gotten = ");
Serial.print(gotten, DEC);
Serial.println();
}
Serial.print("data read (");
Serial.print(gotten);
Serial.print(") = \"");
// print the string, but terminate if we get a null
for (uint8_t ch = 0; ch < gotten && buff[ch]; ch++)
{
Serial.print((char)buff[ch]);
}
Serial.println("\"");
delay(5000);
}
void printDateTime(const RtcDateTime& dt)
{
char datestring[20];
snprintf_P(datestring,
countof(datestring),
PSTR("%02u/%02u/%04u %02u:%02u:%02u"),
dt.Month(),
dt.Day(),
dt.Year(),
dt.Hour(),
dt.Minute(),
dt.Second() );
Serial.print(datestring);
}