#include <SD.h>
#include <SPI.h>


//card detection
int detectPin = 2;
bool card = false;

//data I/O
int datInPin = 11;
int datOutPin = 12;

//files
File myFile;


void setup() {
  // Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
  ; // wait for serial port to connect. Needed for native USB port only
}
Serial.print("Initializing SD card...");
if (!SD.begin(10)) {
  Serial.println("initialization failed!");
  while (1);
}
Serial.println("initialization done.");
// open the file. note that only one file can be open at a time,
// so you have to close this one before opening another.
myFile = SD.open("test.txt", FILE_WRITE);
// if the file opened okay, write to it:
if (myFile) {
  Serial.print("Writing to test.txt...");
  myFile.println("This is a test file");
  myFile.println("testing 1, 2, 3.");
  for (int i = 0; i < 20; i++) {
  myFile.println(i);
}
  // close the file:
  myFile.close();
  Serial.println("done.");
} else {
  // if the file didn't open, print an error:
  Serial.println("error opening test.txt");
}
}

void loop() {
  

}