133709 SD Card Module Slot Socket Reader For Arduino ARM MCU




 * SD Card Module Slot Socket Reader For Arduino ARM MCU (test OK)
 * un autre moins cher mais pas testé

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 * Library for Arduino https://github.com/adafruit/SD
 * http://profmason.com/?p=1956
 * http://www.jeremyblum.com/2011/04/05/tutorial-11-for-arduino-sd-cards-and-datalogging/

Arduino sketch
/* * Log the value of the analog inputs in a data file * * Requires the SD library from the Adafruit website :https://github.com/adafruit/SD * * * SD card attached MOSI - pin 11, MISO - pin 12, CLK - pin 13, CS - pin 10 * GND to GND pin - +5 to 5V * * @from http://profmason.com/?p=1956 */ const int chipSelect = 10; const int NBLINE_BEFORE_FLUSH = 50;
 * 1) include 

const int PERIOD = 10; // period in ms between 2 acquisitions


 * 1) define LOGFILE_NAME "LOGGER00.CSV"

File dataFile; void setup { // Open serial communications and wait for port to open: Serial.begin(57600); 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(SS, 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: while (1) ; } Serial.println("card initialized."); // Open up the file we're going to log to! // create a new file char filename[] = LOGFILE_NAME; for (uint8_t i = 0; i < 100; i++) { filename[6] = i/10 + '0'; filename[7] = i%10 + '0'; if (! SD.exists(filename)) { // only open a new file if it doesn't exist dataFile = SD.open(filename, FILE_WRITE); break; // leave the loop! } }  if (! dataFile) { Serial.println("couldnt create file"); } Serial.print("Logging to: "); Serial.println(filename); } int i = 0; //Use this for the counter 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 < 6; analogPin++) { int sensor = analogRead(analogPin); dataString += String(sensor); if (analogPin < 5) { dataString += ","; } }  dataFile.println(dataString); // print to the serial port too: //Serial.println(' '); // The line dataFile.flush will 'save' the file to the SD card after every // line of data - this will use more power and slow down how much data // you can read but it's safer! // If you want to speed up the system, call flush less often and it // will save the file only when called and every 512 bytes - every time a sector on the // SD card is filled with data. However, don't depend on the automatic flush! i++; if (i>NBLINE_BEFORE_FLUSH){ //Call every NBLINE_BEFORE_FLUSH times dataFile.flush; i = 0; } // Take 1 measurement every PERIOD milliseconds delay(PERIOD); }