Log Data Whilst SD In

hi all,

i'm trying seemingly simple following error every time insert card.

- initialization failed!
- couldn't create file...

the line below gives me 1 when inserted 0 when isn't.

code: [select]

reading = digitalread(sdinpin);

what doing wrong?

thanks in advance,
charles

code: [select]

#include <spi.h>
#include <sd.h>

// --------- general -----------

int sampletime = 10;
long int previous = 0;
long int starttime = 0;
int sdinpin = 2;
boolean starting = true;
boolean reading = false;

file datafile;
const int chipselect = 8;

void setup() {
  serial.begin(115200);
}


void loop() {

  reading = digitalread(sdinpin);

  if (reading) {

    if (starting) {
      serial.print("starting: ");
      serial.println(starting);
      loadsd();
      starttime = millis();
      starting = false;

    }

    if (millis() - previous > sampletime) {

      string datastring = "";

      // add data datastring

      serial.println(datastring);
      datafile.println(datastring);
      datafile.flush();

      previous = millis();
    }
  } else if (starting == false) {
    starting = true;
  }

}

void loadsd() {

  pinmode(ss, output);

  if (!sd.begin()) {
    serial.println("initialization failed!");
  }

  // create new numbered file

  char filename[] = "pheet00.csv";
  for (uint8_t = 0; < 100; i++) {
    filename[5] = / 10 + '0';
    filename[6] = % 10 + '0';
    if (! sd.exists(filename)) {
      // open new file if doesn't exist
      datafile = sd.open(filename, file_write);
      break;  // leave loop!
    }
  }

  datafile = sd.open(filename, file_write);

  if (!datafile) {
    serial.println("couldn't create file...");
  }
}

code: [select]

//mux control pins
int sr0 = 9;
int sr1 = 10;
int sr2 = 11;
int sr3 = 12;


what arduino using? how have wired sd module?
pin 11 mosi , pin 12 miso on spi bus. think pin 10 may need reserved output sd library.

Arduino Forum > Using Arduino > Programming Questions > Log Data Whilst SD In

arduino