riffle_0.96_SDtest.ino

/*
  SD card datalogger

 This example shows how to log data from three analog sensors
 to an SD card using the SD library.

 The circuit:
 * analog sensors on analog ins 0, 1, and 2
 * SD card attached to SPI bus as follows:
 ** MOSI - pin 11
 ** MISO - pin 12
 ** CLK - pin 13
 ** CS - pin 4

 created  24 Nov 2010
 modified 9 Apr 2012
 by Tom Igoe

 This example code is in the public domain.

 */

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


int led = 9;

const int chipSelect = 7;
int SDpower = 6;


void setup()
{
  

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

  
 // Serial.println("card initialized.");
  
   pinMode(SDpower,OUTPUT);
    digitalWrite(SDpower,LOW);
   delay(1000);
   
   // 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;
  }
   
}

void loop()
{
  // make a string for assembling the data to log:
  String dataString = "";

  // read three sensors and append to the string:
  for (int analogPin = 0; analogPin < 3; analogPin++) {
    int sensor = analogRead(analogPin);
    dataString += String(sensor);
    if (analogPin < 2) {
      dataString += ",";
    }
  }

  // open the file. note that only one file can be open at a time,
  // so you have to close this one before opening another.
  File dataFile = SD.open("datalog.txt", FILE_WRITE);

  // if the file is available, write to it:
  if (dataFile) {
    dataFile.println(dataString);
    dataFile.close();
    // print to the serial port too:
   // Serial.println(dataString);
     digitalWrite(led, LOW);
  delay(1000);
  digitalWrite(led, HIGH);   
  delay(1000);
  
  }
  // if the file isn't open, pop up an error:
  else {
    //Serial.println("error opening datalog.txt");
  }
  

}