This example will create the file "TEST_SD.TXT" with creation time and date from the DS1307.
Code: Select all
#include <SD.h>
#include <Wire.h>
#include <RTClib.h>
File file; // test file
const uint8_t SD_CS = 10; // SD chip select
RTC_DS1307 RTC; // define the Real Time Clock object
//------------------------------------------------------------------------------
// call back for file timestamps
void dateTime(uint16_t* date, uint16_t* time) {
DateTime now = RTC.now();
// return date using FAT_DATE macro to format fields
*date = FAT_DATE(now.year(), now.month(), now.day());
// return time using FAT_TIME macro to format fields
*time = FAT_TIME(now.hour(), now.minute(), now.second());
}
//------------------------------------------------------------------------------
void setup() {
Serial.begin(9600);
Wire.begin();
if (!RTC.begin()) {
Serial.println("RTC failed");
while(1);
};
// set date time callback function
SdFile::dateTimeCallback(dateTime);
if (!SD.begin(SD_CS)) {
Serial.println("SD.begin failed");
while(1);
}
file = SD.open("TEST_SD.TXT", FILE_WRITE);
file.close();
Serial.println("Done");
}
//------------------------------------------------------------------------------
void loop() {}