Datasheet

Serial.begin(9600);

Serial.println();

#if WAIT_TO_START

Serial.println("Type any character to start");

while (!Serial.available());

#endif //WAIT_TO_START

K now we are onto the code. We begin by initializing the Serial port at 9600 baud. If we set

WAIT_TO_START to anything but 0, the Arduino will wait until the user types something in.

Otherwise it goes ahead to the next part

// initialize the SD card

Serial.print("Initializing SD card...");

// make sure that the default chip select pin is set to

// output, even if you don't use it:

pinMode(10, OUTPUT);

// see if the card is present and can be initialized:

if (!SD.begin(chipSelect)) {

Serial.println("Card failed, or not present");

// don't do anything more:

return;

}

Serial.println("card initialized.");

// create a new file

char filename[] = "LOGGER00.CSV";

for (uint8_t i = 0; i < 100; i++) {

filename[6] = i/10 + '0';

filename[7] = i%10 + '0';

if (! SD.exists(filename)) {

// only open a new file if it doesn't exist

logfile = SD.open(filename, FILE_WRITE);

break; // leave the loop!

}

if (! logfile) {

error("couldnt create file");

}

Serial.print("Logging to: ");

Serial.println(filename);

Now the code starts to talk to the SD card, it tries to initialize the card and find a

FAT16/FAT32 partition.

Next it will try to make a logfile. We do a little tricky thing here, we basically want the files to

be called something like LOGGERnn.csv where nn is a number. By starting out trying to