I have a Breakout Board for microSD Transflash from SparkFun (SparkFun microSD Transflash Breakout - BOB-00544 - SparkFun Electronics) and I am trying to connect it to the Arduino Due I just bought.
I read this entire forum and countless others and still can not figure out what i am doing incorrectly. I connected the DO (MISO), SCK, and DI (MOSI) to the correct pins on the SPI 6 pin male connector. I used The 21st Century Digital Home: Arduino Due Hardware SPI to configure the pins.
I also attached my chip select (CS) to digital pin 52 to make use of the extended SPI.
5V into Vcc and GND into GND. CD is not connected on my breakout board.
I just used the standard READWRITE example for the SD that comes preloaded in the arduino IDE.
Can someone please explain why I am getting "initialization failed"?? Purely from the print statements that it is because SD.begin(52) does not work. I am confused by this. However, I tried so many more digital pins because lots of people said it doesn't matter, but no luck.
Please help!
/*
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
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;
void setup()
{
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only
}
Serial.print("Initializing SD card...");
// On the Ethernet Shield, CS is pin 4. It's set as an output by default.
// Note that even if it's not used as the CS pin, the hardware SS pin
// (10 on most Arduino boards, 53 on the Mega) must be left as an output
// or the SD library functions will not work.
//pinMode(52, OUTPUT);
if (!SD.begin(52)) {
Serial.println("initialization failed!");
return;
}
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:
if (myFile) {
Serial.print("Writing to test.txt...");
myFile.println("testing 1, 2, 3.");
// close the file:
myFile.close();
Serial.println("done.");
} else {
// if the file didn't open, print an error:
Serial.println("error opening test.txt");
}
// re-open the file for reading:
myFile = SD.open("test.txt");
if (myFile) {
Serial.println("test.txt:");
// read from the file until there's nothing else in it:
while (myFile.available()) {
Serial.write(myFile.read());
}
// close the file:
myFile.close();
} else {
// if the file didn't open, print an error:
Serial.println("error opening test.txt");
}
}
void loop()
{
// nothing happens after setup
}