コード例 #1
0
void logInit() {
    // initialize the SD card
    if (!card.init()) { 
        Serial.print("Error initializing card - ");
        Serial.println(card.errorCode, HEX);
        return;
    }
    
    // initialize a FAT16 volume
    if (!Fat16::init(&card)) {
        Serial.println("Can't initialize volume.");
        return;
    }
    
    // create a new file
    char name[] = "LOGGER00.TXT";
    for (uint8_t i = 0; i < 100; i++) {
        name[6] = i/10 + '0';
        name[7] = i%10 + '0';
        // O_CREAT - create the file if it does not exist
        // O_EXCL - fail if the file exists
        // O_WRITE - open for write only
        if (file.open(name, O_CREAT | O_EXCL | O_WRITE)) break;
    }

    if (!file.isOpen()) {
        Serial.println("Error creating log file.");
        return;
    }
    
    Serial.print("Logging to: ");
    Serial.println(name);

    // write data header
    
    // clear write error
    file.writeError = false;
    file.println("Started log.");
    file.sync();
    
    fileReady = 1;
}
コード例 #2
0
void log(char *fmt, ... ) {
    char buf[128]; // resulting string limited to 128 chars
    va_list args;
    va_start (args, fmt );
    vsnprintf(buf, 128, fmt, args);
    va_end (args);

    if (serial_logging) {
      Serial.print(gps_time);
      Serial.print(':');
      Serial.print(millis());
      Serial.print(' ');
      Serial.print(buf);
    }
    
    if (fileReady) {
        file.print(gps_time);
        file.print(':');
        file.print(millis());
        file.print(' ');
        file.print(buf);
        file.sync();
    }
}