Hello everyone, I am new in arduino form.
I wanted to connect an SD card to arduino DUE, However I do not know which pins to use to connect the SPI.
In the examples says to use pins 11-12-13 but I looked at the Arduino DUE schematic and on these pins I have not found the SPI !
The example is wrong or goes well and I really need to use the pins 11-12-13?
Perhaps the example does not use the internal SPI hardware of SAM3X, but it Generates the SPI only via software ?
Thanks to all
David
You must connect SPI to the "SPI header" http://arduino.cc/en/Main/ArduinoBoardDue. This is the only access to SPI on Due.
SPI: SPI header (ICSP header on other Arduino boards)
These pins support SPI communication using the SPI library. The SPI pins are broken out on the central 6-pin header, which is physically compatible with the Uno, Leonardo and Mega2560. The SPI header can be used only to communicate with other SPI devices, not for programming the SAM3X with the In-Circuit-Serial-Programming technique. The SPI of the Due has also advanced features that can be used with the Extended SPI methods for Due.
Hello
The answer is in the topic "SdFat for Due posted " :
On reply #4 you have a link to a page with many explanation
On reply #15 I explain how I connect a Sparkfun SDshield to the Due
Good luck!
Thanks guys for your answers.
I thought it was so, but the examples were referring to the pins 11-12-13, and so I was confused.
Thank you very much
Davide
Good day
I have a Arduino Due and want save data to an SD card. For this I use a 3.2 'display of ITead with integrated SD slot (http://imall.iteadstudio.com/im120419006.html). This I connected to the Arduino. However, the Arduino don’t detect the SD card (I've tried two different and also reformatted both). The three SD ports I wired correctly to the SPI. The CS-output I wired on to pin 4, 10 or 52 (each one once tested), without success. I have the same also tried adding I use ICSP instead of SPI, which the Arduinowebsite propose. Again, without success. The test program I used is a test-program on the Arduino website for SD cards (Program in the end of the mail, changes marked in bold). Is the problem in the program code or is it a hardware problem? If it is a software problem, could send me a test program that is designed for Arduino Due. I have invested several hours and tens of forums read this but found nothing comparable. Also, the proposed solutions never worked.
Thanks in advance, Marques
/*
SD card test
This example shows how use the utility libraries on which the'
SD library is based in order to get info about your SD card.
Very useful for testing a card when you're not sure whether its working or not.
The circuit:
* SD card attached to SPI bus as follows:
** MOSI - pin 11 on Arduino Uno/Duemilanove/Diecimila
** MISO - pin 12 on Arduino Uno/Duemilanove/Diecimila
** CLK - pin 13 on Arduino Uno/Duemilanove/Diecimila
** CS - depends on your SD card shield or module.
Pin 4 used here for consistency with other Arduino examples
created 28 Mar 2011
by Limor Fried
modified 9 Apr 2012
by Tom Igoe
*/
// include the SD library:
#include <SD.h>
#include <SPI.h>
// set up variables using the SD utility library functions:
Sd2Card card;
SdVolume volume;
SdFile root;
// change this to match your SD shield or module;
// Arduino Ethernet shield: pin 4
// Adafruit SD shields and modules: pin 10
// Sparkfun SD shield: pin 8
const int chipSelect = [b]10[/b];
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("\nInitializing 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([b]chipSelect[/b], OUTPUT); // change this to 53 on a mega
[b] SPI.begin(chipSelect); //habe ich eingeführt, da es in einigen Foren erwähnt wird, funktioniert jedoch mit und ohne nicht. //I made this, becaus it’s mentioned in severals forums, but it didn’t workt wiht it and whitout it [/b] // change this to 53 on a mega
// we'll use the initialization code from the utility libraries
// since we're just testing if the card is working!
if (!card.init(SPI_HALF_SPEED, chipSelect)) {
Serial.println("initialization failed. Things to check:");
Serial.println("* is a card is inserted?");
Serial.println("* Is your wiring correct?");
Serial.println("* did you change the chipSelect pin to match your shield or module?");
return;
} else {
Serial.println("Wiring is correct and a card is present.");
}
// print the type of card
Serial.print("\nCard type: ");
switch(card.type()) {
case SD_CARD_TYPE_SD1:
Serial.println("SD1");
break;
case SD_CARD_TYPE_SD2:
Serial.println("SD2");
break;
case SD_CARD_TYPE_SDHC:
Serial.println("SDHC");
break;
default:
Serial.println("Unknown");
}
// Now we will try to open the 'volume'/'partition' - it should be FAT16 or FAT32
if (!volume.init(card)) {
Serial.println("Could not find FAT16/FAT32 partition.\nMake sure you've formatted the card");
return;
}
// print the type and size of the first FAT-type volume
uint32_t volumesize;
Serial.print("\nVolume type is FAT");
Serial.println(volume.fatType(), DEC);
Serial.println();
volumesize = volume.blocksPerCluster(); // clusters are collections of blocks
volumesize *= volume.clusterCount(); // we'll have a lot of clusters
volumesize *= 512; // SD card blocks are always 512 bytes
Serial.print("Volume size (bytes): ");
Serial.println(volumesize);
Serial.print("Volume size (Kbytes): ");
volumesize /= 1024;
Serial.println(volumesize);
Serial.print("Volume size (Mbytes): ");
volumesize /= 1024;
Serial.println(volumesize);
Serial.println("\nFiles found on the card (name, date and size in bytes): ");
root.openRoot(volume);
// list all files in the card with date and size
root.ls(LS_R | LS_DATE | LS_SIZE);
}
void loop(void) {
}
Hi David,
in fact SPI pins are at the middle of the card as 6 pin (3x2) header and it is titled as "SPI" (just at the top of the header).. I prepared my own SDMemory card (with wires and solder) .. if you like I can post photo of the connections.. certainly with sample skecth to read/write sdmemory..
Dear Reha, something tells me many people will find a photo of a working setup quite useful.
Hi,
let me share the pin connections that I used.. We are so lucky, because Due uses 3.3v and we dont have to put level resistors 
Arduino PIN SPI Header SDMemory Connector PIN
MISO pin#1 DO (pin #7)
SS (D4*) n/a CS (pin #2)
MOSI pin#5 DI (pin #3)
SCK pin#2 SCK (pin #5)
Ground pin#4 GND (pin#6)
Ground pin#4 CD (pin#8)
Vcc pin#6 Vcc (pin #4)
n/a n/c (pin#3) n/a
n/a n/a n/c (pin#1)
n/a n/a n/c (pin#8)
*D4 is arbitrary that I choose in my board/app..
Attached the photo of my work.. Denoted jumpers at backside with white arrow and marked SPI header in green.. Finally, I used SPI.h and SD.h (created Nov 2010 by David A. Mellis)
I hope, this give some idea about "do it yourself" SD Memory usage.
