Hey guys, this is my first time using the SD card. I have the example code in Arduino IDE itself from the SD library. I tried that so I can see what the options are. But it's not going the way I want it to.
I want to be able to put the sd card in whenever I want. At the moment I have to put the SD card in before I turn the Arduino on.
this is what I have to try out the SD card module. (the module I have is this)
code:
/*
SD card read/write
This example shows how to read and write data to and from an SD card file
The circuit:
SD card attached to SPI bus as follows:
** MOSI - pin 11
** MISO - pin 12
** CLK - pin 13
** CS - pin 4 (for MKRZero SD: SDCARD_SS_PIN)
created Nov 2010
by David A. Mellis
modified 9 Apr 2012
by Tom Igoe
This example code is in the public domain.
*/
#include <SPI.h>
#include <SD.h>
File myFile;
int butt = 5;
int buttstate;
int timers;
void setup() {
// Open serial communications and wait for port to open:
Serial.begin(9600);
pinMode(butt, INPUT);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
Serial.print("Initializing SD card...");
if (!SD.begin(4)) {
Serial.println("initialization failed!");
while (1);
}
Serial.println("initialization done.");
// open the file. note that only one file can be open at a time,
// so you have to close this one before opening another.
myFile = SD.open("test.txt", FILE_WRITE);
// if the file opened okay, write to it:
// read from the file until there's nothing else in it:
while (myFile.available()) {
Serial.write(myFile.read());
}
Serial.print("Writing to test.txt...");
}
void loop() {
buttstate = digitalRead(butt);
timers= millis();
// nothing happens after setup
if (myFile) {
myFile.println(timers);
// close the file:
}
if (buttstate == HIGH)
{
myFile.close();
}
}