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

File myFile;
const int chipSelect = 53;




void setup() {
  Serial.begin(115200);
  
   Serial.begin(9600);
   while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }
  
  Serial.print("Initializing SD card...");
  // On the Ethernet Shield, CS is pin 4. It's set as an output by default.
  // Note that even if it's not used as the CS pin, the hardware SS pin 
  // (10 on most Arduino boards, 53 on the Mega) must be left as an output 
  // or the SD library functions will not work. 
  pinMode(SS, OUTPUT);

  if (!SD.begin(chipSelect)) {
    Serial.println("initialization failed!");
    return;
  }
  Serial.println("initialization done.");
  
  check_for_file("p001", "per");
  
  
 


}


void loop() {


}//end loop


void check_for_file(String filename, String extension){
  String str = filename + '.' + extension;
  char* buf = NULL;
  str.toCharArray(buf, str.length() + 1);
  
  if (SD.exists("p001.per")) {
    Serial.println(str + " exists.");
  }
  else {
    Serial.println(str + " doesn't exist.");
  }
}