#include <SPI.h>
#include <SD.h>
 
char s[] = "Farzad Hashemi ([email protected])";
 
#define SD_CS_PIN PA4 
 
//////////////////////////////////////////////////////////////
 
void readFile(const char * path)
{
  Serial.print("Reading file: ");
  Serial.println(path);
 
  File file = SD.open(path);
  if(!file){
    Serial.println("Failed to open file for reading");
    return;
  }
 
  Serial.print("Read from file: ");
  while(file.available()){
    Serial.write(file.read());
  }
  Serial.println();
  file.close();
}
 
//////////////////////////////////////////////////////////////
 
void writeFile(const char * path, const char * message)
{
  Serial.print("Writing file: ");
  Serial.println(path);
 
  File file = SD.open(path, FILE_WRITE);
  if(!file){
    Serial.println("Failed to open file for writing");
    return;
  }
  
  if(file.print(message)){
    Serial.println("File written");
  } else {
    Serial.println("Write failed");
  }
  file.close();
}
 
//////////////////////////////////////////////////////////////
 
void deleteFile(const char * path)
{
  Serial.print("Deleting file: ");
  Serial.println(path);
  
  if(SD.remove(path)){
    Serial.println("File deleted");
  } else {
    Serial.println("Delete failed");
  }
}
 
//////////////////////////////////////////////////////////////
 
void setup()
{
  Serial.begin(115200);
  while (!Serial) 
  { delay(10); }
 
  Serial.println("Initializing SD card...");
 
  if(!SD.begin(SD_CS_PIN))
  {
    Serial.println("Card Mount Failed");
    return;
  }
  Serial.println("Card Initialized successfully.");
 
  writeFile("/Test.txt", s);
  readFile("/Test.txt");
}
 
void loop()
{ 
  delay(10); 
}