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| /* |
| 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 <SD.h> |
| |
| |
| // On the Ethernet Shield, CS is pin 4. Note that even if it's not |
| // used as the CS pin, the hardware CS pin (10 on most Arduino boards, |
| // 53 on the Mega) must be left as an output or the SD library |
| // functions will not work. |
| const int chipSelect = 4; |
| int led = 5; |
| unsigned int n = 0; |
| char inChar; |
| String dataString = ""; |
| String filename = "log.csv"; |
| int coll = 0; |
| |
| void setup() |
| { |
| // Open serial communications and wait for port to open: |
| Serial.begin(9600); |
| while (!Serial) { |
| ; // wait for serial port to connect. Needed for Leonardo only |
| } |
| |
| |
| Serial.print("Initializing SD card..."); |
| // make sure that the default chip select pin is set to |
| // output, even if you don't use it: |
| pinMode(10, OUTPUT); |
| pinMode(led, OUTPUT); |
| |
| // 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; |
| } |
| Serial.println("card initialized."); |
| |
| ReadGPS(); |
| // filename = dataString.substring(0,5) + dataString.substring(dataString.length()-5,dataString.length()) + filename; |
| int len = dataString.length()-1; |
| filename = dataString.substring(len-2,len) + dataString.substring(len-4,len-2) + dataString.substring(len-6,len-4) + dataString.substring(0,2) + ".CSV "; |
| } |
| |
| void loop() |
| { |
| ReadGPS(); |
| |
| digitalWrite(led, HIGH); // turn the LED on (HIGH is the voltage level) |
| delay(20); // wait for a second |
| digitalWrite(led, LOW); // turn the LED off by making the voltage LOW |
| delay(20); // wait for a second |
| |
| // make a string for assembling the data to log: |
| // String dataString = ""; |
| |
| dataString += String(n++); |
| dataString += ","; |
| |
| // read three sensors and append to the string: |
| for (int analogPin = 0; analogPin < 2; analogPin++) |
| { |
| int sensor = analogRead(analogPin); |
| dataString += String(sensor); |
| if (analogPin < 1) |
| { |
| dataString += ","; |
| } |
| } |
| |
| char fileNameCharArray[filename.length()]; |
| filename.toCharArray(fileNameCharArray, filename.length()); |
| File dataFile = SD.open(fileNameCharArray, FILE_WRITE); |
| // 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(filename, 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); |
| } |
| // if the file isn't open, pop up an error: |
| else { |
| Serial.println("error opening datalog.txt"); |
| } |
| } |
| |
| |
| void ReadGPS() |
| { |
| dataString = ""; |
| coll = 0; |
| |
| while(1) |
| { |
| // get incoming byte: |
| while (!Serial.available()); |
| if (Serial.read() != '$') continue; |
| while (!Serial.available()); |
| if (Serial.read() != 'G') continue; |
| while (!Serial.available()); |
| if (Serial.read() != 'P') continue; |
| while (!Serial.available()); |
| if (Serial.read() != 'R') continue; |
| while (!Serial.available()); |
| if (Serial.read() != 'M') continue; |
| while (!Serial.available()); |
| if (Serial.read() != 'C') continue; |
| while (!Serial.available()); |
| if (Serial.read() != ',') continue; |
| break; |
| } |
| |
| do |
| { |
| while (!Serial.available()); |
| inChar = (char)Serial.read(); |
| if (inChar == ',') coll++; |
| dataString += inChar; |
| } |
| while (coll < 9); |
| } |
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