Arduino Due and Sd shield

Hardware Arduino Due
2

Very important!!!

The Due's SPI is on the 6 pin ICSP header, not shared with the I/O pins as on the Uno etc. From that pinout you should be able to connect wires to the correct places on whatever shield you use, just not plugged directly. Personally I build my own shield once I noticed the Due and my SD shields were not compatible, soldered some wires to a micro SD to SD adapter and was rolling.

ALSO VERY IMPORTANT!!!

While the Arduino Due is 3.3v, the VCC pin on the ICSP is 5V!!! The Sd card is 3.3v so do not connect to that pin...

Here is a simple data logger, with some write error reporting...let us know how it goes!!!

#include <SdFat.h>

const int chipSelect = 8;

SdFat sd;
SdFile myFile;

void setup(){
  Serial2.begin(115200);
  pinMode(8, OUTPUT);
  sd.begin(chipSelect, SPI_FULL_SPEED);
  if(!myFile.open("test.txt", O_RDWR | O_CREAT | O_AT_END))  //To print an error message when boot up and it can't write to the SD file
    Serial.println("AHHHHHHHHHH File open ERRORRRR!");
  else{
    String x = "Loggin Started";
    Serial.print(x);
    for(int i=0;i<x.length();i++)  //Writes to text file
      myFile.write(x[i]);
    myFile.sync();  //Actual write command from write buffer
    if(!myFile.getWriteError()){  //Check for writes error
      digitalWrite(13, LOW);  //Goes Low when no error
    }
    else if(myFile.getWriteError()){  //If write error, turn LED on and Write Error message
      myFile.clearWriteError();  //clear error flag
      digitalWrite(13, HIGH);  //Goes high if error LED onboard
    }
  }
}

void loop(){
  while(Serial2.available() > 0){  //The source of Data to be logged
    char tempChar = Serial2.read(); //The source of Data to be logged
    String inputString = "";
    inputString += tempChar;
    if(tempChar == 10){   
      for(int i=0;i<inputString.length();i++)  //Writes bytes of Serial String to buffer
          myFile.write(inputString[i]);
      myFile.sync();   //Writes to File
      if(!myFile.getWriteError()){  //Check for writes error
        digitalWrite(13, LOW);  //Use onboard LED for Error clear
      }
      else if(myFile.getWriteError()){  //If write error, turn LED
        myFile.clearWriteError();  //Clear error flag
        digitalWrite(13, HIGH);  //Use onboard LED for Error Flag
        sd.begin(chipSelect, SPI_FULL_SPEED);   //Re-initiallize SD after an error
        myFile.open("test.txt", O_RDWR | O_CREAT | O_AT_END);   //Reopen file after a write error
      }
      inputString = "";  //Clear the buffer string 
    }
  }
}