Hello everyone,
I am having some problem saving a new file everytime my arduino reboot. I tried using the exact same code below and I manage to save a new file everytime i reboot. For instance, DATA01 … to DATA18 is save into my SD card. However, when i reach DATA19, the file is not save inside my SD card. The file below is my code. please help! thanks in advance
#include "Wire.h" // This library allows you to communicate with I2C devices.
#include <SD.h>
#include <SPI.h>
#include <Time.h>
#define FILE_BASE_NAME "DATA"
File file;
const uint8_t pinCS = 10;
const uint8_t BASE_NAME_SIZE = sizeof(FILE_BASE_NAME) - 1;
char fileName[] = FILE_BASE_NAME "00.csv";
const int MPU_ADDR = 0x68; // I2C address of the MPU-6050. If AD0 pin is set to HIGH, the I2C address will be 0x69.
int16_t accelerometer_x, accelerometer_y, accelerometer_z; // variables for accelerometer raw data
int16_t gyro_x, gyro_y, gyro_z; // variables for gyro raw data
int16_t temperature; // variables for temperature data
char tmp_str[7]; // temporary variable used in convert function
char* convert_int16_to_str(int16_t i) { // converts int16 to string. Moreover, resulting strings will have the same length in the debug monitor.
sprintf(tmp_str, "%6d", i);
return tmp_str;
}
void setup() {
Serial.begin(9600);
Wire.begin();
Wire.beginTransmission(MPU_ADDR); // Begins a transmission to the I2C slave (GY-521 board)
Wire.write(0x6B); // PWR_MGMT_1 register
Wire.write(0); // set to zero (wakes up the MPU-6050)
Wire.endTransmission(true);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
Serial.println(" ");
Serial.println("Initializing SD card...");
// see if the card is present and can be initialized:
if (!SD.begin(pinCS)) {
Serial.println("Card failed, or not present");
// don't do anything more:
while (1);
}
Serial.println("card initialized.");
while (SD.exists(fileName)) {
if (fileName[BASE_NAME_SIZE + 1] != '9') {
fileName[BASE_NAME_SIZE + 1]++;
} else if (fileName[BASE_NAME_SIZE] != '9') {
fileName[BASE_NAME_SIZE + 1] = '0';
fileName[BASE_NAME_SIZE]++;
} else {
Serial.println(F("Can't create file name"));
return;
}
}
file = SD.open(fileName, FILE_WRITE);
if (!file) {
Serial.println(F("open failed"));
return;
}
Serial.print(F("opened: "));
Serial.println(fileName);
file.close();
pinMode(pinCS, OUTPUT);
}
void loop() {
Wire.beginTransmission(MPU_ADDR);
Wire.write(0x3B); // starting with register 0x3B (ACCEL_XOUT_H) [MPU-6000 and MPU-6050 Register Map and Descriptions Revision 4.2, p.40]
Wire.endTransmission(false); // the parameter indicates that the Arduino will send a restart. As a result, the connection is kept active.
Wire.requestFrom(MPU_ADDR, 7 * 2, true); // request a total of 7*2=14 registers
// "Wire.read()<<8 | Wire.read();" means two registers are read and stored in the same variable
accelerometer_x = Wire.read() << 8 | Wire.read(); // reading registers: 0x3B (ACCEL_XOUT_H) and 0x3C (ACCEL_XOUT_L)
accelerometer_y = Wire.read() << 8 | Wire.read(); // reading registers: 0x3D (ACCEL_YOUT_H) and 0x3E (ACCEL_YOUT_L)
accelerometer_z = Wire.read() << 8 | Wire.read(); // reading registers: 0x3F (ACCEL_ZOUT_H) and 0x40 (ACCEL_ZOUT_L)
temperature = Wire.read() << 8 | Wire.read(); // reading registers: 0x41 (TEMP_OUT_H) and 0x42 (TEMP_OUT_L)
// print out data
Serial.print("aX = "); Serial.print(convert_int16_to_str(accelerometer_x));
Serial.print(" | aY = "); Serial.print(convert_int16_to_str(accelerometer_y));
Serial.print(" | aZ = "); Serial.print(convert_int16_to_str(accelerometer_z));
// the following equation was taken from the documentation [MPU-6000/MPU-6050 Register Map and Description, p.30]
Serial.print(" | temp = "); Serial.print(temperature / 340.00 + 36.53);
Serial.println();
file = SD.open(fileName, FILE_WRITE);
if (file) {
file.print (temperature / 340.00 + 36.53);
file.print (",");
file.print(convert_int16_to_str(accelerometer_x));
file.print (",");
file.print(convert_int16_to_str(accelerometer_y));
file.print (",");
file.println (convert_int16_to_str(accelerometer_z));
file.close();
}
else {
Serial.println ("Error opening test.");
}
{
// delay
delay(500);
}
}